ISO 2817:1974

Tobacco and tobacco products — Determination of silica content

Tabac et produits du tabac — Détermination de la teneur en silice

Tobak in tobačni proizvodi - Določanje vsebnosti silicija

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-1974
• Withdrawal Date: 28-Feb-1974
• ICS: 65.160 - Tobacco, tobacco products and related equipment
• Technical Committee: ISO/TC 126/SC 1 - Physical and dimensional tests
• Drafting Committee: ISO/TC 126/SC 1 - Physical and dimensional tests
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 22-Jul-1999
• Ref Project: SIST ISO 2817:1995 - Tobacco and tobacco products -- Determination of silica content

Relations

• Revised: ISO 2817:1999 - Tobacco and tobacco products — Determination of silicated residues insoluble in hydrochloric acid
• Effective Date: 15-Apr-2008
• Revised: SIST ISO 2817:2000 - Tobacco and tobacco products -- Determination of silicated residues insoluble in hydrochloric acid
• Effective Date: 12-May-2008

Standards Content (Sample)

INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXnYHAPOAHAX OPTAHM3AWX l-Io CTAHAAPTM3ALUiW~ORGANISATION INTERNATIONALE DE NORMALISATION
Tobacco and tobacco products -
Determination of silica content
Tabac et produits du tabac - Determination de Ia teneur en silice
First edition - 1974-03-01
w
- UDC 663.97 : 543.062 : 546.282 Ref. No. ISO 2817-1974 (E)
Descriptors : agricu I tu ral products, tobacco, Chemical analysis, determination of content, Silicon dioxide, combustion.
Price based on 3 pages

---------------------- Page: 1 ----------------------
1SO (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 TechnicaP 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 BS0 Councii.
International Standard ISO 2817 was drawn up by Technical Committee
ISB/TC 126, Tobacco and tobacco products, and circulated to the Member Bedies
in June 1972.
lt has been approved by the Member Bodies of the following countries :
Australia Iran South Africa, Rep. sf
Ireland
Belgium Switzerland
Egypt, Arab Rep. of Netherlands Turkey
France New Zealand United Kingdom
Germany Poland U.S.S. R.
Romania
Hungary
The Member Bodies of the following countries expressed disapproval of the
document on technical grounds :
India
Thailand
0 International Organkation for Standardization, 1974 Q
Printed in Switzerland

---------------------- Page: 2 ----------------------
INTERNATIONAL STANDARD
ISO 28174974 (E)
Tobacco and tobacco products -
Determination of silica content
1 SCOPE AND FIELD OF APPLICATION 4 METHOD 1 : INCINERATION METHOD
This International Standard specifies two methods for the
determination of the silica content of tobacco :
4.1 Principle
- the incineration method (method 1); Incineration of the test Portion in air at a temperature of
550 ‘C, leaching with hydrochloric acid, re-incineration and
- the wet digestion method (method 2).
weighing of the residue.
These methods are suitable for leaf and tut tobacco.
4.2 Reagents
2 DEFINITION
4.2.1 Hydrochlorit acid, 1 N.
By silica is meant the residual material of whole leaf or tut
tobacco obtained after incineration and extraction with
4.2.2 Nitrit acid, concentrated (p2c 1,42 g/ml).
hydrochloric acid (method 1) or by digestion and
incineration (method 2) under the conditions specified.
4.3 Apparatus
3 SAMPLING
Ordinary Iaboratory apparatus not otherwise specified, and
the following items :
3.1 Sampling method
Carry out sampling by the method described in ISO. . . IJ.
4.3.1 Analytical balance.
3.2 Preparation of the Sample
4.3.2 Muffle furnace, weil ventilated, giving an adequate
For whole leaf or tut tobacco, air dry the laboratory zone of uniform temperature at 550 2 25 "C.
Sample to a water content of between 5 and 9 % and mill
it until the whole of the Iaboratory Sample Passes a
4.3.3 Dish, rectangular, approximately 50 to 70 mm by
2 mm mesh Screen. Thoroughly mix the milled Sample,
50 mm and 30 mm deep, of silica, or alternatively a platinum
preferably by mechanical means. If the Sample is not to be
dish of similar dimensions.
examined at once, but is to be kept for 4 days or more, it
in
should be stored at a temperature of between 0 and 5 “C
a wide-mouth airtight Container of such a capacity that the
4.3.4 Hotplate, electrically heated, capable of attaining a
Sample may be adequately mixed by inverting the Container
temperature of 400 “C.
at least twice before taking any Sample for analysis.
1) I n preparation.

---------------------- Page: 3 ----------------------
ISO 2817-1974 (E9
5.2 Reagents
4.4 Procedure
5.2J Nitrit-acid, concentrated (p2c l,42 g/ml).
4.4.1 Testportion
Weigh, to the nearest 0,001 g, the clean dry dish (4.3.3).
5.22 Perchlorit acid, 72 % (m/m).
Take from the Container approximately 10 g of the
prepared Sample and spread it uniformly over the bottom of
WARNING : Evaporations with perchloric acid must be
the dish. Reweigh the dish and test Portion to the nearest
carried out in a weil-ventilated fume cupboard which is
0,001 g. The mass mq of the test Portion tan then be
kept clean and free from combustible materials and is
calculated to the nearest 0,001 g.
suitably constructed to resist exposure to perchloric acid
fumes. In addition adequate shielding against possible
explosion shall be provided for operators.
4.4.2 Determination
Place the dish (4.3.3) containing the test Portion on the
hotplate (4.3.4) and heat slowly at a temperature of 340 to
380 “C in a fume cupboard, until the test Portion is
5.3 Apparatus
completely charred.
Usual laborator apparatus not otherwise specified, and the
Y
Transfer the dish to the muffle furnace (4.3.2), pre-heated
following items
to a temperature of 550 + 25 ‘C, and heat the test Portion
for 2 h at this temperature, leaving the furnace door slightly
5.3.1 Analytical balance.
open to provide adequate Ventilation. Remove the dish
f
...

SLOVENSKI STANDARD
SIST ISO 2817:1995
01-maj-1995
7REDNLQWREDþQLSURL]YRGL'RORþDQMHYVHEQRVWLVLOLFLMD
Tobacco and tobacco products -- Determination of silica content
Tabac et produits du tabac -- Détermination de la teneur en silice
Ta slovenski standard je istoveten z: ISO 2817:1974
ICS:
65.160 7REDNWREDþQLL]GHONLLQ Tobacco, tobacco products
RSUHPD and related equipment
SIST ISO 2817:1995 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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

SIST ISO 2817:1995

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

SIST ISO 2817:1995
INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXnYHAPOAHAX OPTAHM3AWX l-Io CTAHAAPTM3ALUiW~ORGANISATION INTERNATIONALE DE NORMALISATION
Tobacco and tobacco products -
Determination of silica content
Tabac et produits du tabac - Determination de Ia teneur en silice
First edition - 1974-03-01
w
- UDC 663.97 : 543.062 : 546.282 Ref. No. ISO 2817-1974 (E)
Descriptors : agricu I tu ral products, tobacco, Chemical analysis, determination of content, Silicon dioxide, combustion.
Price based on 3 pages

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

SIST ISO 2817:1995
1SO (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 TechnicaP 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 BS0 Councii.
International Standard ISO 2817 was drawn up by Technical Committee
ISB/TC 126, Tobacco and tobacco products, and circulated to the Member Bedies
in June 1972.
lt has been approved by the Member Bodies of the following countries :
Australia Iran South Africa, Rep. sf
Ireland
Belgium Switzerland
Egypt, Arab Rep. of Netherlands Turkey
France New Zealand United Kingdom
Germany Poland U.S.S. R.
Romania
Hungary
The Member Bodies of the following countries expressed disapproval of the
document on technical grounds :
India
Thailand
0 International Organkation for Standardization, 1974 Q
Printed in Switzerland

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

SIST ISO 2817:1995
INTERNATIONAL STANDARD
ISO 28174974 (E)
Tobacco and tobacco products -
Determination of silica content
1 SCOPE AND FIELD OF APPLICATION 4 METHOD 1 : INCINERATION METHOD
This International Standard specifies two methods for the
determination of the silica content of tobacco :
4.1 Principle
- the incineration method (method 1); Incineration of the test Portion in air at a temperature of
550 ‘C, leaching with hydrochloric acid, re-incineration and
- the wet digestion method (method 2).
weighing of the residue.
These methods are suitable for leaf and tut tobacco.
4.2 Reagents
2 DEFINITION
4.2.1 Hydrochlorit acid, 1 N.
By silica is meant the residual material of whole leaf or tut
tobacco obtained after incineration and extraction with
4.2.2 Nitrit acid, concentrated (p2c 1,42 g/ml).
hydrochloric acid (method 1) or by digestion and
incineration (method 2) under the conditions specified.
4.3 Apparatus
3 SAMPLING
Ordinary Iaboratory apparatus not otherwise specified, and
the following items :
3.1 Sampling method
Carry out sampling by the method described in ISO. . . IJ.
4.3.1 Analytical balance.
3.2 Preparation of the Sample
4.3.2 Muffle furnace, weil ventilated, giving an adequate
For whole leaf or tut tobacco, air dry the laboratory zone of uniform temperature at 550 2 25 "C.
Sample to a water content of between 5 and 9 % and mill
it until the whole of the Iaboratory Sample Passes a
4.3.3 Dish, rectangular, approximately 50 to 70 mm by
2 mm mesh Screen. Thoroughly mix the milled Sample,
50 mm and 30 mm deep, of silica, or alternatively a platinum
preferably by mechanical means. If the Sample is not to be
dish of similar dimensions.
examined at once, but is to be kept for 4 days or more, it
in
should be stored at a temperature of between 0 and 5 “C
a wide-mouth airtight Container of such a capacity that the
4.3.4 Hotplate, electrically heated, capable of attaining a
Sample may be adequately mixed by inverting the Container
temperature of 400 “C.
at least twice before taking any Sample for analysis.
1) I n preparation.

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

SIST ISO 2817:1995
ISO 2817-1974 (E9
5.2 Reagents
4.4 Procedure
5.2J Nitrit-acid, concentrated (p2c l,42 g/ml).
4.4.1 Testportion
Weigh, to the nearest 0,001 g, the clean dry dish (4.3.3).
5.22 Perchlorit acid, 72 % (m/m).
Take from the Container approximately 10 g of the
prepared Sample and spread it uniformly over the bottom of
WARNING : Evaporations with perchloric acid must be
the dish. Reweigh the dish and test Portion to the nearest
carried out in a weil-ventilated fume cupboard which is
0,001 g. The mass mq of the test Portion tan then be
kept clean and free from combustible materials and is
calculated to the nearest 0,001 g.
suitably constructed to resist exposure to perchloric acid
fumes. In addition adequate shielding against possible
explosion shall be provided for operators.
4.4.2 Determination
Place the dish (4.3.3) containing the test Portion on the
hot
...

@ 2817
NORME INTERNATIONALE
'*E&
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXAYHAPOAHAX OPïAHM3ALIMR ii0 CTAHflAPTM3AUMM .ORGANISATION INTERNATIONALE DE NORMALISATION
Tabac et produits du tabac -
Détermination de la teneur en silice
Tobacco and tobacco products - Determination of silica content
Première edition - 1974-03-01
CDU 663.97 : 543.062 : 546.282
Réf. No : IS0 2817-1974 (F)
Descripteurs : produit agricole, tabac, analyse chimique, dosage, silice, combustion.
Prix basé sur 3 pages

---------------------- Page: 1 ----------------------
AVANT-PROPOS
IS0 (Organisation Internationale de Normalisation) est une fédération mondiale
d'organismes nationaux de normalisation (Comités Membres ISO). L'élaboration de
Normes Internationales est confiée aux Comités Techniques ISO. Chaque Comité
Membre intéressé par une étude a le droit de faire partie du Comité Technique
correspondant. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I'ISO, participent également aux travaux.
Les Projets de Normes Internationales adoptés par les Comités Techniques sont
soumis aux Comités Membres pour approbation, avant leur acceptation comme
Normes Internationales par le Conseil de I'ISO.
La Norme Internationale IS0 2817 a été établie par le Comité Technique
ISO/TC 126, Tabac et produits du tabac, et soumise aux Comités Membres en juin
1972.
Elle a été approuvée par les Comités Membres des pays suivants :
Afrique du Sud, Rép. do Hongrie Roumanie
Allemagne Iran Royaume-Uni
Australie Irlande Suisse
Belgique Nouvelle-Zélande Turquie
Egypte, Rép. arabe d' Pays-Bas U.R.S.S.
France Pologne
Les Comités Membres des pays suivants ont désapprouvé le document pour des
raisons techniques :
Inde
Thaï I ande
O Organisation Internationale de Normalisation, 1974
Imprimé en Suisse

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NORME INTERNATIONALE IS0 2817-1974 (F)
Tabac et produits du tabac -
Détermination de la teneur en silice
1 OBJET ET DOMAINE D'APPLICATION
4 MÉTHODE I : MÉTHODE PAR INCINÉRATION
e
La présente Norme Internationale spécifie deux méthodes
4.1 Principe
de détermination de la teneur en silice du tabac, à savoir :
Incinération à l'air de la prise d'essai à 550 OC, lavage avec
- la méthode par incinération (méthode 1);
de l'acide chlorhydrique, nouvelle incinération et pesage du
- la méthode par digestion humide (méthode 2). résidu.
Ces méthodes s'appliquent pour le tabac en feuilles et le
4.2 Réactifs
tabac haché.
4.2.1 Acide chlorhydrique, 1 N.
2 DÉFINITION
4.2.2 Acide nitrique, concentré (p20 1.42 g/ml).
On entend par silice la matière résiduelle du tabac en
feuilles entières ou tabac haché, obtenue après incinération
et extraction avec de l'acide chlorydrique (méthode 1) ou
4.3 Appareillage
par digestion et incinération (méthode 2) sous les
conditions spécifiées.
Matériel courant de laboratoire, sauf indication contraire
spécifiée, et appareils suivants :
3 ÉCHANTILLONNAGE
4.3.1 Balance analytique.
3.1 Méthode d'échantillonnage
4.3.2 Four à moufle, bien ventilé, donnant une zone
L'échantillonnage doit être effectué selon la méthode
convenable de température uniforme de 550 f 25 OC.
spécifiée dans I'ISO . . . ').
4.3.3 Capsule, rectangulaire, en silice, ayant approximati-
3.2 Préparation de l'échantillon
wement 50 a 70 mm sur 50 mm et de 30 mm de profondeur,
ou en variante, capsule en platine de dimensions similaires.
Pour le tabac en feuilles entières ou le tabac haché, sécher à
l'air l'échantillon pour laboratoire jusqu'à une teneur en eau
comprise entre 5 et 9 %, et broyer jusqu'à ce que l'ensemble
4.3.4 Plaque chauffante, chauffée électriquement, pouvant
de l'échantillon pour laboratoire passe à travers un tamis de
atteindre une température de 400 OC.
2 mm d'ouverture de maille. Mélanger régulièrement I'échan-
tillon broyé, de préférence mécaniquement. Si l'échantillon
n'est pas examiné immédiatement, mais doit être conservé 4.4 Mode opératoire
durant 4 jours ou plus, il doit être conservé à une tempéra-
ture comprise entre O et 5 OC dans un récipient étanche à
4.4.1 Prise d'essai
large ouverture, d'une capacité telle que l'échantillon puisse
être mélangé d'une manière appropriée en renversant le
Peser la capsule (4.3.3) propre et sèche, à 0.001 9 près.
récipient au moins deux fois avant de prendre l'échantillon
Prendre dans le récipient, approximativement 10 g de
pour l'analyse.
l'échantillon préparé et les répartir uniformément au fond
1 ) En préparation.
1

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IS0 2817-1974 (FI
de la capsule. Peser la capsule avec la prise d'essai à 0,001 g ATTENTION : Les évaporations avec l'acide perchlorique
près. La masse m, de la prise d'essai peut alors être calculée doivent se faire sous une hotte fermée bien ventilée, propre
à 0.001 g près. et dégagée de toute matière combustible et construite
soigneusement afin de résister à l'exposition des vapeurs
d'acide perchlorique. En plus, on doit prévoir une
4.4.2 Détermination
protection adéquate pour l'opérateur contre une explosion
Placer la capsule (4.3.3) contenant la prise d'essai sur la
possible.
plaque chauffante (4.3.4) et chauffer lentement à une
température de 340 à 380°C sous une hotte fermée,
jusqu'à ce que l'échantillon soit complètement carbonisé.
Mettre ensuite la capsule dans le four à moufle (4.3.2)
5.3 Appareillage
préalablement chauffé à 550 f 25 OC et chauffer la prise
Matériel courant de laboratoire, sauf indication contraire
d'essai durant 2 h à cette température, en laissant la porte
spécifiée, et appareils suivants :
du four légèrement ouverte pour éta
...