SIST EN ISO 787-19:1997
(Main)General methods of test for pigments - Part 19: Determination of water-soluble nitrates (Salicyclic acid method) (ISO 787-19:1974)
General methods of test for pigments - Part 19: Determination of water-soluble nitrates (Salicyclic acid method) (ISO 787-19:1974)
This document specifies a spectrophotometric method. The principle of the method consists in that the nitrate present in the extract of the sample is used to nitrate salicylic acid in sulphuric acid medium. The nitro-compound formed is of an intense yellow colour in alkaline solution and the colour is measured spectrophotometrically at a wavelength of 410 nm. ISO 787/13 specifies a method using Nessler's reagent. The two methods may not necessarily give the same result; work is being carried out to compare the two methods.
Allgemeine Prüfverfahren für Pigmente - Teil 19: Bestimmung der wasserlöslichen Nitrate (Salicylsäure-Verfahren) (ISO 787-19:1974)
Teil 19 dieser Internationalen Norm legt ein allgemeines Prüfverfahren zur Bestimmung der wasserlöslichen Nitrate in einer Pigmentprobe mit einem photometrischen Verfahren unter Verwendung von Salicylsäure fest. Teil 13 legt ein Verfahren zur Bestimmung der wasserlöslichen Nitrate in einer Pigmentprobe nach dem Neßler-Verfahren fest.
Méthodes générales d'essai des pigments - Partie 19: Détermination des nitrates solubles dans l'eau (Méthode a l'acide salicyclique) (ISO 787-19:1974)
La dix-neuvième partie de la présente Norme Internationale fixe une méthode générale d'essai pour déterminer les nitrates solubles dans l'eau dans un échantillon de pigment, par une méthode spectrophotométrique, en utilisant l'acide salicylique. La treizième partie fixe une méthode pour déterminer les nitrates solubles dans l'eau dans un échantillon de pigment par la méthode de Nessler.
NOTES 1 Chaque fois que cette méthode générale est applicable pour un pigment donné, il devra simplement y être fait référence dans la Norme Internationale relative à ce pigment, et toutes les modifications de détail qui peuvent être nécessaires, en raison des propriétés spéciales du pigment considéré, devront être mentionnées dans une note. Ce n'est que dans le cas où cette méthode générale ne serait pas applicable à un pigment particulier, qu'il deviendrait nécessaire de spécifier une méthode particulière pour la détermination des nitrates. 2 Il doit être noté que les deux méthodes ne
Splošne metode preskušanja pigmentov - 19. del: Ugotavljanje vodotopnih nitratov (metoda s salicilno kislino) (ISO 787-19:1974)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 787-19:1997
01-december-1997
Splošne metode preskušanja pigmentov - 19. del: Ugotavljanje vodotopnih nitratov
(metoda s salicilno kislino) (ISO 787-19:1974)
General methods of test for pigments - Part 19: Determination of water-soluble nitrates
(Salicyclic acid method) (ISO 787-19:1974)
Allgemeine Prüfverfahren für Pigmente - Teil 19: Bestimmung der wasserlöslichen
Nitrate (Salicylsäure-Verfahren) (ISO 787-19:1974)
Méthodes générales d'essai des pigments - Partie 19: Détermination des nitrates
solubles dans l'eau (Méthode a l'acide salicyclique) (ISO 787-19:1974)
Ta slovenski standard je istoveten z: EN ISO 787-19:1995
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
SIST EN ISO 787-19:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 787-19:1997
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SIST EN ISO 787-19:1997
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SIST EN ISO 787-19:1997
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SIST EN ISO 787-19:1997
INTERNATIONAL STANDARD’
787lXlX
I
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MElKflYHAPOAHAII OPTAHW3ALWX n0 CTAHAAPTW3AIUi&i *ORGANISATION INTERNATIONALE DE NORMALISATION
General methods of test for Pigments -
Part XIX
Methodes g&Grales d*essais des pigmen ts - Dix-neuvi6me Partie
First edition - 1974-05-01
UDC 667.622 : 620.1 Ref. No. ISO 787/XlX-1974 (E)
Descriptors : paints, Pigments, tests, Chemical analysis, determination of content, nitrates, spectrophotometry.
Price based on 2 pages
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SIST EN ISO 787-19:1997
FOREWORD
ISO (the International Organization for Standardization) is a worldwide federation
of national Standards institutes (ISO Member Bodies). The work of developing
International Standards is carried out through ISO Technical Committees. Every
Member Body interested in a subject for which a Technical Committee has been set
up 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.
Draft International Standards adopted by the Technical Committees are circulated
to the Member Bodies for approval before their acceptance as International
Standards by the ISO Council.
International Standard ISO 787/XIX (originally ISO/DIS 2807) was drawn up by
Technical Committee ISO/TC 35, Paints and varnishes, and circulated to the
Member Bodies in April 1972.
lt has been approved by the Member Bodies of the following countries :
Austria Israel Sweden
Brazil Italy Switzerland
Czechoslovakia Netherlands Thailand
Egypt, Arab Rep. of New Zealand Turkey
France Poland United Kingdom
Germany Romania U.S.A.
India South Africa, Rep. of U.S.S.R.
Ireland Spain
The Member Body of the following country e xpressed di roval of the do cument
SaPP
on technical grounds :
Canada
0 International Organkation for Standardkation, 1974 l
Printed in Switzerland
ii
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SIST EN ISO 787-19:1997
The purpose of this International Standard is to establish a series of general test
methods for Pigments which are suitable for all or many of the individual Pigments
for which specifications might be required. In such cases, a Cross-reference to the
general method should be included in the International Standard relating to that
Pigment, with a note of any detailed modifications which might be needed in view
of the special properties of the Pigment in question.
Committee lSO/TC 35 decided that all the general methods should be published as
they become available, as Parts of a Single International Standard, in Order to
emphasize the relationship of each to the whole series.
The Committee also decided that, where two or more procedures were widely used
for determining the same or a similar characteristic of a Pigment, there would be no
objection to including more than one of them in the ISO series. In such cases it will,
however, be essential to state clearly in a specification which method is to be used
and, in the test report, which method has been used.
Parts of the series already published are as follows :
Part I : Comparison of colour
Part II : Determination of matter volatile at 105 “C
Part II I : Determination of matter soluble in water (Hot extraction method)
Part IV : Determination of acidity or alkalinity of the aqueous extract
Part V : Determination of oil absorption value
Part VI : Determination of residue on sieve (Oil method)
Part VII : Determination of residue on sieve (Water method)
Part VIII : Determination of matter soluble in water (Cold extraction method)
Part IX : Determination of pH value of an aqueous Suspension
Part X : Determination of density relative to water at 4 “C
Part XI : Determination of tamped volume
Part XII : Visual comparison of hue of powered white Pigment (Hollow cone
method)
Part XI I I : Determination of water-soluble sulphates, chlorides and nitrates
Part XIV : Determination of resistivity of aqueous extract
Part XV : Comparison of resistance of coloured Pigments of similar types to
light from a specif ied light Source
Part XVI : Comparison of relative tinting strength (or equivalent colouring
value) and colour on reduction in Iinseed stand oil using the automatic muller
Part XVI I : Comparison of lightening power of white Pigments
Part XVIII : Determination of residue on sieve by a mechanical flushing
procedure
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SIST EN ISO 787-19:1997
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SIST EN ISO 787-19:1997
ISO 787/XlX-1974 (E)
INTERNATIONAL STANDARD
General methods of test for pigments-
Part XIX : Determination of water-soluble nitrates
(Salicylic acid method)
0 INTRODUCTION 4.3 Et
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