Paper, board and pulp -- Determination of acid-soluble copper

This International Standard specifies the procedure for the determination of acid-soluble copper by atomic absorption spectrometry or by plasma emission spectrometry. It is applicable to all types of paper, board and pulp. It specifies a method to determine the acid-soluble part of the incineration residue, i.e. that part of the ignition residue obtained after incineration which is soluble in hydrochloric acid. If the residue is completely soluble, the result obtained by the procedure specified in this International Standard is taken as the total amount of copper in the sample. The limit of determination is normally 0,1 mg/kg of paper, board or pulp, but it depends on the spectrometer used.

Papier, carton et pâte -- Détermination de la teneur en cuivre soluble dans l'acide

L'ISO 778:2005 spécifie une méthode de détermination de la teneur en cuivre soluble dans l'acide par spectrométrie d'absorption atomique ou par spectrométrie d'émission de plasma.
Elle est applicable à tous les types de papier, de carton et de pâte.
Elle spécifie une méthode de détermination de la partie soluble dans l'acide des résidus d'incinération, à savoir la partie des cendres qui est soluble dans l'acide chlorhydrique. Si le résidu est complètement soluble, le résultat obtenu, en utilisant la procédure spécifiée dans l'ISO 778:2005, correspond à la quantité totale de cuivre dans l'échantillon. La limite de détermination est normalement 0,1 mg/kg de papier, carton ou pâte, mais elle dépend du spectromètre utilisé.

Papir, karton, lepenka in vlaknine - Določevanje bakra, topnega v kislini

a mednarodni standard opredeljuje postopek za določevanje bakra, topnega v kislini, z atomsko absorpcijsko spektrometrijo ali s plazemsko emisijsko spektroskopijo. Velja za vse vrste papirja, kartona, lepenke in vlaknin. Opredeljuje metodo za določevanje dela ostanka po žarjenju, ki je topen v kislini, tj. tisti del ostanka po žarjenju, ki je topen v klorovodikovi kislini. Če je ostanek popolnoma topen, rezultat, ki ga pridobimo s postopkom, opredeljenim v tem mednarodnem standardu, predstavlja celotno količino bakra v vzorcu. Meja določljivosti je običajno 0,1 mg/kg papirja, kartona, lepenke ali vlaknin, a je odvisna od uporabljenega spektrometra.

General Information

Status
Withdrawn
Public Enquiry End Date
29-Mar-2011
Publication Date
13-Apr-2011
Withdrawal Date
17-Feb-2013
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
14-Feb-2013
Due Date
09-Mar-2013
Completion Date
18-Feb-2013

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МЕЖДУНАРОДНЫЙ ISO
СТАНДАРТ 778
Третье издание
2005-05-01


Бумага, картон и целлюлоза.
Определение содержания меди,
растворимой в кислоте
Paper, board and pulp – Determination of acid-soluble copper


Ответственность за подготовку русской версии несёт GOST R
(Российская Федерация) в соответствии со статьёй 18.1 Устава ISO
Ссылочный номер
ISO 778:2005(R)
©
ISO 2005

---------------------- Page: 1 ----------------------
ISO 778:2005(R)
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© ISO 2005
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комитет-член ISO в стране запрашивающей стороны.
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Опубликовано в Швейцарии

ii © ISO 2005 – Все права сохраняются

---------------------- Page: 2 ----------------------
ISO 778:2005(R)
Предисловие
Международная организация по стандартизации (ISO) является всемирной федерацией национальных
организаций по стандартизации (комитетов-членов ISO). Разработка международных стандартов
обычно осуществляется техническими комитетами ISO. Каждый комитет-член, заинтересованный в
деятельности, для которой был создан технический комитет, имеет право быть представленным в этом
комитете. Международные правительственные и неправительственные организации, имеющие связи с
ISO, также принимают участие в работах. Что касается стандартизации в области электротехники, то
ISO работает в тесном сотрудничестве с Международной электротехнической комиссией (IEC).
Проекты международных стандартов разрабатываются в соответствии с правилами Директив ISO/IEC,
Часть 2.
Основная задача технических комитетов заключается в подготовке международных стандартов.
Проекты международных стандартов, принятые техническими комитетами, рассылаются комитетам-
членам на голосование. Их опубликование в качестве международных стандартов требует одобрения
не менее 75 % комитетов-членов, принимающих участие в голосовании.
Следует иметь в виду, что некоторые элементы настоящего международного стандарта могут быть
объектом патентных прав. ISO не может нести ответственность за идентификацию какого-либо одного
или всех патентных прав.
Документ ISO 778 подготовлен Техническим комитетом ISO/TC 6, Бумага, картон и целлюлоза.
Настоящее третье издание отменяет и заменяет второе издание (ISO 778:2001), которое подверглось
незначительному пересмотру. Не считая незначительных редакторских правок, изменен только
заголовок в соответствии ISO 1830:2005 и для отличия от стандарта ISO 17812 (планируемого к
изданию), который задает метод определения общей массовой доли кальция, марганца, железа и
меди.
Первое издание настоящего международного стандарта включает фотометрический метод, а также
процедуру на основе атомно–абсорбционной спектроскопии. Во втором издании фотометрический
метод исключен, так как в настоящее время этот метод используется редко, а область применения
стандарта расширена, чтобы охватить бумагу и картон в дополнение к целлюлозе.
© ISO 2005 – Все права сохраняются iii

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ISO 778:2005(R)
Введение
[1] [2]
Настоящий международный стандарт соответствует ISO 777 и ISO 779 , чтобы сделать возможным
конечное измерение содержания всех трех элементов путем анализа одного и того же раствора.
iv © ISO 2005 – Все права сохраняются

---------------------- Page: 4 ----------------------
МЕЖДУНАРОДНЫЙ СТАНДАРТ ISO 778:2005(R)

Бумага, картон и целлюлоза. Определение содержания
меди, растворимой в кислоте
ПРЕДУПРЕЖДЕНИЕ Метод, заданный в настоящем международном стандарте связан с
использованием опасных химикатов и газов, которые могут составлять с воздухом
взрывчатые смеси. Необходимо позаботиться об обеспечении соблюдения соответствующих
мер предосторожности.
1 Область применения
Настоящий международный стандарт задает метод для определения содержания меди, растворимой в
кислоте, на основе атомной абсорбционной или плазменной эмиссионной спектрометрии.
Он распространяется на все виды бумаги, картона и целлюлозы.
Этот стандарт задает метод определения растворимой в кислоте зольный остаток после сжигания, т.е.
золы, полученной после прокаливания и растворенной в соляной кислоте. Если остаток является
полностью растворимым, то результат, полученный методом, который задан в настоящем
международном стандарте, берется в качестве общего количества меди в образце для анализа.
Предел определения обычно составляет 0,1 мг на кг бумаги, картона или целлюлозы, но зависит от
применяемого спектрометра.
2 Нормативные ссылки
Следующие нормативные документы являются обязательными для применения с настоящим
международным стандартом. Для жестких ссылок применяются только указанное по тексту издание.
Для плавающих ссылок необходимо использовать самое последнее издание нормативного ссылочного
документа (включая любые изменения).
ISO 186, Бумага и картон. Отбор образцов для определения среднего качества
ISO 287, Бумага и картон. Определение содержания влаги. Метод высушивания в печи
ISO 638, Целлюлоза. Определение содержания сухого вещества
ISO 1762, Бумага, картон и целлюлоза. Определение остатка (золы) при прокаливании при 525 °C
ISO 7213, Целлюлоза. Отбор образцов для испытаний
3 Термины и определения
В настоящем документе применяются следующие термины и определения.
3.1
массовая доля меди
mass fraction of copper
доля меди в растворе, полученном после прокаливания образца при 525 °C и обработки зольного
остатка соляной кислотой с концентрацией 6 моль/л, как задано в настоящем международном
стандарте
© ISO 2005 – Все права сохраняются 1

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ISO 778:2005(R)
4 Сущность метода
Часть образца для анализа прокаливается при 525 °C и полученный зольный остаток обрабатывается
соляной кислотой с концентрацией 6 моль/л. Анализируемая проба вводится в пламя ацетилен/закись
азота или ацетилен/воздуха, а массовая доля меди устанавливается одним из следующих методов:
– измерение поглощения по атомному спектру на длине волны 324,7 нм, излучаемой лампой с
полым медным катодом; или
– измерение поглощения на длине волны 324,7 нм, излучаемой при плазменной эмиссионной
спектрометрии.
5 Реактивы и материалы
Используйте химические реактивы признанного аналитического качества и только дистиллированную
или деионизированную воду.
5.1 Соляная кислота, концентрация около 6 моль/л
Разбавьте 500 мл соляной кислоты (плотностью 1,19 г/мл) в 500 мл воды.
5.2 Азотная кислота, плотность 1,4 г/мл.
5.3 Запас раствора меди, 100 мг/л меди.
Растворите 100 мг чистой электролитической меди в возможном наименьшем количестве азотной
кислоты (плотностью 1,4 г/мл). Кипятите для того, чтобы удалить азотистые пары, и оставьте для
охлаждения. Перенесите раствор полностью в мерную колбу на 1 000 мл. Разбавьте водой до отметки
и перемешайте.
1 мл этого основного раствора содержит 0,10 мг Cu.
5.4 Эталонный раствор меди, 10 мг/л Cu.
Перенесит
...

INTERNATIONAL ISO
STANDARD 778
Third edition
2005-05-01


Paper, board and pulp — Determination
of acid-soluble copper
Papier, carton et pâte — Détermination de la teneur en cuivre soluble
dans l'acide




Reference number
ISO 778:2005(E)
©
ISO 2005

---------------------- Page: 1 ----------------------
ISO 778:2005(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO 2005 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 778:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 778 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.
This third edition cancels and replaces the second edition (ISO 778:2001), of which it constitutes a minor
revision. Apart from minor editorial modifications, only the title has been changed, to be consistent with
ISO 1830:2005, and to make a distinction with ISO 17812 (to be published) which specifies the method to
determine the total mass fraction of calcium, manganese, iron and copper.
The first edition of this International Standard included the photometric procedure as well as the procedure
based on atomic absorption spectroscopy. In the second edition, the photometric procedure was deleted, as it
is now seldom used, and the scope was enlarged to include paper and board in addition to pulp.
© ISO 2005 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 778:2005(E)
Introduction
[1] [2]
This International Standard corresponds to ISO 777 and ISO 779 in order to make it possible to perform
the final measurement of all three elements on the same solution.

iv © ISO 2005 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 778:2005(E)

Paper, board and pulp — Determination of acid-soluble copper
WARNING — The method specified in this International Standard involves the use of some hazardous
chemicals and of gases that can form explosive mixtures with air. Care must be taken to ensure that
the relevant precautions are observed.
1 Scope
This International Standard specifies the procedure for the determination of acid-soluble copper by atomic
absorption spectrometry or by plasma emission spectrometry.
It is applicable to all types of paper, board and pulp.
It specifies a method to determine the acid-soluble part of the incineration residue, i.e. that part of the ignition
residue obtained after incineration which is soluble in hydrochloric acid. If the residue is completely soluble,
the result obtained by the procedure specified in this International Standard is taken as the total amount of
copper in the sample. The limit of determination is normally 0,1 mg/kg of paper, board or pulp, but it depends
on the spectrometer used.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies
ISO 186, Paper and board — Sampling to determine average quality
ISO 287, Paper and board — Determination of moisture content — Oven-drying method
ISO 638, Pulps — Determination of dry matter content
ISO 1762, Paper, board and pulps — Determination of residue (ash) on ignition at 525 °C
ISO 7213, Pulps — Sampling for testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
mass fraction of copper
amount of the element copper in the solution obtained after incineration of the specimen at 525 °C and
treating the residue with 6 mol/l hydrochloric acid, as specified in this International Standard
© ISO 2005 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO 778:2005(E)
4 Principle
A test portion is incinerated at 525 °C and the residue is treated with 6 mol/l hydrochloric acid. The test
solution is aspirated into an acetylene/dinitrogen monoxide or acetylene/air flame and the mass fraction of
copper is determined by one of the following procedures:
 measurement of the absorption of the 324,7 nm line emitted by a copper hollow-cathode lamp, or
 measurement of the absorption of the 324,7 nm line emitted by plasma emission spectrometry.
5 Reagents and materials
Use only chemicals of recognized analytical grade and only distilled or deionized water.
5.1 Hydrochloric acid, about 6 mol/l.
Dilute 500 ml of hydrochloric acid (density 1,19 g/ml) in 500 ml of water.
5.2 Nitric acid, density 1,4 g/ml.
5.3 Copper stock solution, 100 mg/l of Cu.
Dissolve 100 mg of pure electrolytic copper in the smallest quantity possible of nitric acid (density 1,4 g/ml).
Boil in order to expel nitrous fumes and allow to cool. Transfer the solution completely to a 1 000 ml volumetric
flask. Dilute with water to the mark and mix.
1 ml of this stock solution contains 0,10 mg of Cu.
5.4 Copper standard solution, 10 mg/l of Cu.
Transfer 100 ml of the copper stock solution (5.3) to a 1 000 ml volumetric flask and add 200 ml of
hydrochloric acid (5.1).
...

SLOVENSKI STANDARD
SIST ISO 778:2011
01-maj-2011
3DSLUNDUWRQOHSHQNDLQYODNQLQH'RORþHYDQMHEDNUDWRSQHJDYNLVOLQL
Paper, board and pulp -- Determination of acid-soluble copper
Papier, carton et pâte -- Détermination de la teneur en cuivre soluble dans l'acide
Ta slovenski standard je istoveten z: ISO 778:2005
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
SIST ISO 778:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 778:2011

---------------------- Page: 2 ----------------------

SIST ISO 778:2011


INTERNATIONAL ISO
STANDARD 778
Third edition
2005-05-01


Paper, board and pulp — Determination
of acid-soluble copper
Papier, carton et pâte — Détermination de la teneur en cuivre soluble
dans l'acide




Reference number
ISO 778:2005(E)
©
ISO 2005

---------------------- Page: 3 ----------------------

SIST ISO 778:2011
ISO 778:2005(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland

ii © ISO 2005 – All rights reserved

---------------------- Page: 4 ----------------------

SIST ISO 778:2011
ISO 778:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 778 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.
This third edition cancels and replaces the second edition (ISO 778:2001), of which it constitutes a minor
revision. Apart from minor editorial modifications, only the title has been changed, to be consistent with
ISO 1830:2005, and to make a distinction with ISO 17812 (to be published) which specifies the method to
determine the total mass fraction of calcium, manganese, iron and copper.
The first edition of this International Standard included the photometric procedure as well as the procedure
based on atomic absorption spectroscopy. In the second edition, the photometric procedure was deleted, as it
is now seldom used, and the scope was enlarged to include paper and board in addition to pulp.
© ISO 2005 – All rights reserved iii

---------------------- Page: 5 ----------------------

SIST ISO 778:2011
ISO 778:2005(E)
Introduction
[1] [2]
This International Standard corresponds to ISO 777 and ISO 779 in order to make it possible to perform
the final measurement of all three elements on the same solution.

iv © ISO 2005 – All rights reserved

---------------------- Page: 6 ----------------------

SIST ISO 778:2011
INTERNATIONAL STANDARD ISO 778:2005(E)

Paper, board and pulp — Determination of acid-soluble copper
WARNING — The method specified in this International Standard involves the use of some hazardous
chemicals and of gases that can form explosive mixtures with air. Care must be taken to ensure that
the relevant precautions are observed.
1 Scope
This International Standard specifies the procedure for the determination of acid-soluble copper by atomic
absorption spectrometry or by plasma emission spectrometry.
It is applicable to all types of paper, board and pulp.
It specifies a method to determine the acid-soluble part of the incineration residue, i.e. that part of the ignition
residue obtained after incineration which is soluble in hydrochloric acid. If the residue is completely soluble,
the result obtained by the procedure specified in this International Standard is taken as the total amount of
copper in the sample. The limit of determination is normally 0,1 mg/kg of paper, board or pulp, but it depends
on the spectrometer used.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies
ISO 186, Paper and board — Sampling to determine average quality
ISO 287, Paper and board — Determination of moisture content — Oven-drying method
ISO 638, Pulps — Determination of dry matter content
ISO 1762, Paper, board and pulps — Determination of residue (ash) on ignition at 525 °C
ISO 7213, Pulps — Sampling for testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
mass fraction of copper
amount of the element copper in the solution obtained after incineration of the specimen at 525 °C and
treating the residue with 6 mol/l hydrochloric acid, as specified in this International Standard
© ISO 2005 – All rights reserved 1

---------------------- Page: 7 ----------------------

SIST ISO 778:2011
ISO 778:2005(E)
4 Principle
A test portion is incinerated at 525 °C and the residue is treated with 6 mol/l hydrochloric acid. The test
solution is aspirated into an acetylene/dinitrogen monoxide or acetylene/air flame and the mass fraction of
copper is determined by one of the following procedures:
 measurement of the absorption of the 324,7 nm line emitted by a copper hollow-cathode lamp, or
 measurement of the absorption of the 324,7 nm line emitted by plasma emission spectrometry.
5 Reagents and materials
Use only chemicals of recognized analytical grade and only distilled or deionized water.
5.1 Hydrochloric acid, about 6 mol/l.
Dilute 500 ml of hydrochloric acid (density 1,19 g/ml) in 500 ml of water.
5.2 Nitric acid, density 1,4 g/ml.
5.3 Copper stock solution, 100 mg/l of Cu.
Dissolve 100 mg of pure electrolytic copper in the smallest quantity poss
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Papier, carton et pâte -- Détermination de la teneur en cuivre soluble dans l'acidePaper, board and pulp -- Determination of acid-soluble copper85.060Papir, karton in lepenkaPaper and board85.040VlakninePulpsICS:Ta slovenski standard je istoveten z:ISO 778:2005oSIST ISO 778:2011en01-marec-2011oSIST ISO 778:2011SLOVENSKI
STANDARD



oSIST ISO 778:2011



Reference numberISO 778:2005(E)© ISO 2005
INTERNATIONAL STANDARD ISO778Third edition2005-05-01Paper, board and pulp — Determination of acid-soluble copper Papier, carton et pâte — Détermination de la teneur en cuivre soluble dans l'acide
oSIST ISO 778:2011



ISO 778:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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ii © ISO 2005 – All rights reserved
oSIST ISO 778:2011



ISO 778:2005(E) © ISO 2005 – All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 778 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps. This third edition cancels and replaces the second edition (ISO 778:2001), of which it constitutes a minor revision. Apart from minor editorial modifications, only the title has been changed, to be consistent with ISO 1830:2005, and to make a distinction with ISO 17812 (to be published) which specifies the method to determine the total mass fraction of calcium, manganese, iron and copper. The first edition of this International Standard included the photometric procedure as well as the procedure based on atomic absorption spectroscopy. In the second edition, the photometric procedure was deleted, as it is now seldom used, and the scope was enlarged to include paper and board in addition to pulp. oSIST ISO 778:2011



ISO 778:2005(E) iv © ISO 2005 – All rights reserved Introduction This International Standard corresponds to ISO 777 [1] and ISO 779 [2] in order to make it possible to perform the final measurement of all three elements on the same solution.
oSIST ISO 778:2011



INTERNATIONAL STANDARD ISO 778:2005(E) © ISO 2005 – All rights reserved 1 Paper, board and pulp — Determination of acid-soluble copper WARNING — The method specified in this International Standard involves the use of some hazardous chemicals and of gases that can form explosive mixtures with air. Care must be taken to ensure that the relevant precautions are observed. 1 Scope This International Standard specifies the procedure for the determination of acid-soluble copper by atomic absorption spectrometry or by plasma emission spectrometry. It is applicable to all types of paper, board and pulp. It specifies a method to determine the acid-soluble part of the incineration residue, i.e. that part of the ignition residue obtained after incineration which is soluble in hydrochloric acid. If the residue is completely soluble, the result obtained by the procedure specified in this International Standard is taken as the total amount of copper in the sample. The limit of determination is normally 0,1 mg/kg of paper, board or pulp, but it depends on the spectrometer used. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies ISO 186, Paper and board — Sampling to determine average quality ISO 287, Paper and board — Determination of moisture content — Oven-drying method ISO 638, Pulps — Determination of dry matter content ISO 1762, Paper, board and pulps — Determination of residue (ash) on ignition at 525 °C ISO 7213, Pulps — Sampling for testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 mass fraction of copper amount of the element copper in the solution obtained after incineration of the specimen at 525 °C and treating the residue with 6 mol/l hydrochloric acid, as specified in this International Standard oSIST ISO 778:2011



ISO 778:2005(E) 2 © ISO 2005 – All rights reserved 4 Principle A test portion is incinerated at 525 °C and the residue is treated with 6 mol/l hydrochloric acid. The test solution is aspirated into an acetylene/dinitrogen monoxide or acetylene/air flame and the mass fraction of copper is determined by one of the following procedures: =measurement of the absorption of the 324,7 nm line emitted by a copper hollow-cathode lamp, or =measurement of the absorption of the 324,7 nm line emitted by plasma emission spectrometry. 5 Reagents and materials Use only chemicals of recognized analytical grade and only distilled or deionized water. 5.1 Hydrochloric acid, about 6 mol/l. Dilute 500 ml of hydrochloric acid (density 1,19 g/ml) in 500 ml of water. 5.2 Nitric acid, density 1,4 g/ml. 5.3 Copper stock solution, 100 mg/l of Cu. Dissolve 100 mg of pure electrolytic copper in the smallest quantity possible of nitric acid (density 1,4 g/ml). Boil in ord
...

NORME ISO
INTERNATIONALE 778
Troisième édition
2005-05-01



Papier, carton et pâte — Détermination de
la teneur en cuivre soluble dans l'acide
Paper, board and pulp — Determination of acid-soluble copper




Numéro de référence
ISO 778:2005(F)
©
ISO 2005

---------------------- Page: 1 ----------------------
ISO 778:2005(F)
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Publié en Suisse

ii © ISO 2005 – Tous droits réservés

---------------------- Page: 2 ----------------------
ISO 778:2005(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée
aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du
comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI,
Partie 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur
publication comme Normes internationales requiert l'approbation de 75 % au moins des comités membres
votants.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de ne
pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO 778 a été élaborée par le comité technique ISO/TC 6, Papiers, cartons et pâtes.
Cette troisième édition annule et remplace la deuxième édition (ISO 778:2001), dont elle constitue une
révision mineure. Outre des modifications d'ordre rédactionnel, seul le titre a été modifié, afin d'assurer une
cohérence avec l'ISO 1830:2005 et une distinction avec l'ISO 17812 (à publier) qui spécifie la méthode pour
déterminer la fraction massique totale en calcium, en manganèse, en fer et en cuivre.
La première édition de la présente Norme internationale décrivait la méthode photométrique et la méthode
basée sur la spectrométrie d'absorption atomique. Dans la deuxième édition, la méthode photométrique avait
été éliminée, car elle est rarement utilisée de nos jours, et le domaine d'application avait été élargi pour
inclure le papier et le carton, en plus de la pâte.
© ISO 2005 – Tous droits réservés iii

---------------------- Page: 3 ----------------------
ISO 778:2005(F)
Introduction
[1] [2]
La présente Norme internationale correspond à l'ISO 777 et à l'ISO 779 ; il est donc possible d'obtenir des
mesures finales des trois éléments pour la même solution.

iv © ISO 2005 – Tous droits réservés

---------------------- Page: 4 ----------------------
NORME INTERNATIONALE ISO 778:2005(F)

Papier, carton et pâte — Détermination de la teneur en cuivre
soluble dans l'acide
AVERTISSEMENT — La méthode spécifiée dans la présente Norme internationale prévoit l'utilisation
de produits chimiques dangereux et de gaz qui peuvent former des mélanges explosifs avec l'air.
S'assurer que les mesures de sécurité nécessaires ont été prises.
1 Domaine d'application
La présente Norme internationale spécifie une méthode de détermination de la teneur en cuivre soluble dans
l'acide par spectrométrie d'absorption atomique ou par spectrométrie d'émission de plasma.
Elle est applicable à tous les types de papier, de carton et de pâte.
Elle spécifie une méthode de détermination de la partie soluble dans l'acide des résidus d'incinération, à
savoir la partie des cendres qui est soluble dans l'acide chlorhydrique. Si le résidu est complètement soluble,
le résultat obtenu, en utilisant la procédure spécifiée dans la présente Norme internationale, correspond à la
quantité totale de cuivre dans l'échantillon. La limite de détermination est normalement 0,1 mg/kg de papier,
carton ou pâte, mais elle dépend du spectromètre utilisé.
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent document. Pour les
références datées, seule l'édition citée s'applique. Pour les références non datées, la dernière édition du
document de référence s'applique (y compris les éventuels amendements).
ISO 186, Papier et carton — Échantillonnage pour déterminer la qualité moyenne
ISO 287, Papier et carton — Détermination de l'humidité — Méthode par séchage à l'étuve
ISO 638, Pâtes — Détermination de la teneur en matières sèches
ISO 1762, Papier, carton et pâtes — Détermination du résidu (cendres) après incinération à 525 °C
ISO 7213, Pâtes — Échantillonnage pour essais
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions suivants s'appliquent.
3.1
fraction massique de cuivre
quantité de cuivre présente dans la solution après incinération de l'éprouvette à 525 °C et traitement du résidu
avec de l'acide chlorhydrique à 6 mol/l, conformément à la présente Norme internationale
© ISO 2005 – Tous droits réservés 1

---------------------- Page: 5 ----------------------
ISO 778:2005(F)
4 Principe
Incinérer une prise d'essai à 525 °C et traiter le résidu avec de l'acide chlorhydrique à 6 mol/l. Aspirer la
solution d'essai dans une flamme d'acétylène/monoxyde de diazote ou une flamme aéro-acétylénique, et
déterminer la fraction massique de cuivre par l'un des deux procédés suivants:
 mesure de l'absorption de la ligne de 324,7 nm émise par une lampe à cathode creuse au cuivre, ou
 mesure de l'absorption de la ligne de 324,7 nm émise par par un spectromètre à émission de plasma.
5 Réactifs et matériaux
Utiliser uniquement des produits chimiques de qualité analytique reconnue et de l'eau distillée ou déionisée.
5.1 Acide chlorhydrique, 6 mol/l environ.
Diluer 500 ml d'acide chlorhydrique (densité de 1,19 g/ml) dans 500 ml d'eau.
5.2 Acide nitrique, de densité 1,4 g/ml.
5.3 Solution mère de cuivre, 100 mg/l de Cu.
Diluer 100 mg de cuivre pur électrolytique dans la plus petite quantité possible d'acide nitrique (densité de
1,4 g/ml). Faire bouillir afin d'extraire les vapeurs de nitrate et laisser refroidir. Transférer la solution entière
dans une fiole jaugée de 1 000 ml. Diluer avec de l'eau jusqu'au trait et mélanger.
1 ml de cette solution mère contient 0,10 mg de Cu.
5.4 Solution étalon de cuivre, 10 mg/l de Cu.
Transférer 100 ml de la solution mère (5.3) dans une fiole jaugée de 1 000 ml et ajouter 200 ml d'acide
chlorhydrique (5.1). Diluer avec de l'eau
...

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