DIN ISO 16632-2015 Tobacco and tobacco products - Determination of water content - Gas-chromatographic method (ISO 16632 2013)《烟草和烟草制品 水含量的测定 气相色谱法(ISO 16632-2013)》.pdf
《DIN ISO 16632-2015 Tobacco and tobacco products - Determination of water content - Gas-chromatographic method (ISO 16632 2013)《烟草和烟草制品 水含量的测定 气相色谱法(ISO 16632-2013)》.pdf》由会员分享,可在线阅读,更多相关《DIN ISO 16632-2015 Tobacco and tobacco products - Determination of water content - Gas-chromatographic method (ISO 16632 2013)《烟草和烟草制品 水含量的测定 气相色谱法(ISO 16632-2013)》.pdf(14页珍藏版)》请在麦多课文档分享上搜索。
1、December 2015 English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 65.160!%Il“2385973www.din.deDIN
2、 ISO 16632Tobacco and tobacco products Determination of water content Gas-chromatographic method (ISO 16632:2013),English translation of DIN ISO 16632:2015-12Tabak und Tabakerzeugnisse Bestimmung des Wassergehalts Gaschromatographisches Verfahren (ISO 16632:2013),Englische bersetzung von DIN ISO 166
3、32:2015-12Tabac et produits du tabac Dtermination de la teneur en eau Mthode par chromatographie en phase gazeuse (ISO 16632:2013),Traduction anglaise de DIN ISO 16632:2015-12SupersedesDIN ISO 16632:2004-05www.beuth.deDocument comprises pagesDTranslation by DIN-Sprachendienst.In case of doubt, the G
4、erman-language original shall be considered authoritative.1411.15 Contents PageIntroduction 1 Scope .2 Normative references 3 Terms and definitions .4 Principle 5 Reagents 6 Apparatus .7 Sampling 8 Procedure.8.1 Sample handling 8.2 Test portion 8.3 Setting up the apparatus.8.4 Calibration of the gas
5、 chromatograph 9 Expression of results .10 Repeatability and reproducibility .11 Alternative gas-chromatographic procedures and analysis precautions .11.1 General 11.2 Alternative columns .12 Test report Bibliography .DIN ISO 16632:2015-12 2 National foreword . 3 National Annex NA (informative) Bibl
6、iography 4 566666788888910101212121314A comma is used as the decimal marker. National foreword This document (ISO 16632:2013) has been prepared by Technical Committee ISO/TC 126 “Tobacco and tobacco products”. The responsible German body involved in its preparation was DIN-Normenausschuss Lebensmitt
7、el und landwirtschaftliche Produkte (DIN Standards Committee Food and Agricultural Products), Working Committee NA 057-04-01 AA Tabak und Tabakerzeugnisse. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held resp
8、onsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 648 DIN EN ISO 648 ISO 1042 DIN EN ISO 1042 ISO 3534-1 DIN ISO 3534-1 ISO 3534-2 DIN ISO 3534-2 ISO 3696 DIN ISO 3696 ISO 4387 DIN IS
9、O 4387 ISO 6488 DIN ISO 6488 ISO 8243 DIN ISO 8243 ISO 15592-1 DIN ISO 15592-1 ISO/IEC 17025 DIN EN ISO/IEC 17025 Amendments This standard differs from DIN ISO 16632:2004-05 as follows: a) a warning notice has been included to point out that the use of this standard can involve hazardous materials,
10、operations and equipment. b) the definition of the term “high-moisture tobacco” has been revised (3.1). Previous editions DIN ISO 16632: 2004-05 DIN ISO 16632:2015-12 3 National Annex NA (informative) Bibliography DIN EN ISO 648, Laboratory glassware Single-volume pipettes DIN EN ISO 1042, Laborator
11、y glassware One-mark volumetric flasks DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories DIN ISO 3534-1, Statistics Vocabulary and symbols Part 1: General statistical terms and terms used in probability DIN ISO 3534-2, Statistics Vocabulary and sym
12、bols Part 2: Applied statistics DIN ISO 3696, Water for analytical laboratory use Specification and test methods DIN ISO 4387, Cigarettes Determination of total and nicotine-free dry particulate matter using a routine analytical smoking machine DIN ISO 6488, Tobacco and tobacco products Determinatio
13、n of water content Karl Fischer method DIN ISO 8243, Cigarettes Sampling DIN ISO 15592-1, Fine-cut tobacco and smoking articles made from it Methods of sampling, conditioning and analysis Part 1: Sampling DIN ISO 16632:2015-12 4 IntroductionDuring the development of this International Standard, inte
14、rlaboratory tests were carried out using two different principles for the determination of the water content of raw tobacco and tobacco taken from finished products. These were the gas-chromatographic procedure, and the Karl Fischer procedure.These studies show that no differences occur between the
15、results obtained by the two different methods. The Karl Fischer method is described in ISO 6488.DIN ISO 16632:2015-12 5 Tobacco and tobacco products Determination of water content Gas-chromatographic methodWARNING The use of this standard can involve hazardous materials, operations and equipment. Th
16、is International Standard does not purport to address all the safety problems associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1 Sco
17、peThis International Standard specifies a gas-chromatographic (GC) method for the determination of water content. It is applicable to raw tobacco as well as tobacco taken from finished products. The method is suitable for water contents ranging at least from a mass fraction of 2 % to 55 %.2 Normativ
18、e referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appl
19、ies.ISO 3696, Water for analytical laboratory use Specification and test methodsISO 4874, Tobacco Sampling of batches of raw material General principlesISO 8243, Cigarettes SamplingISO 15592-1, Fine-cut tobacco and smoking articles made from it Methods of sampling, conditioning and analysis Part 1:
20、Sampling3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1high-moisture tobaccoany tobacco sample containing volatile matter over 20 % as determined by drying at between 100 C and 105 C4 PrincipleThe water content of a sample of tobacco or a tobac
21、co product is determined by methanolic extraction, followed by capillary GC analysis with thermal conductivity detection, using isopropanol as internal standard. The method is applicable to any type of tobacco sample provided that the particle size reduction is less than 4 mm.NOTE If a size reductio
22、n (grinding or cutting) is applied, it can create a decrease in the original water content. Cryogenic techniques may be used to prevent such moisture losses.5 ReagentsUse only reagents of recognized analytical grade.5.1 Carrier gas: helium.DIN ISO 16632:2015-12 N1)N1)National footnote: In the German
23、 version of this standard, the term “particle size reduction” has, for a better understanding, been translated as “Teilchengre” (see 8.1). 6 5.2 Methanol, with a maximum water content of 1,0 mg/ml.This is hygroscopic so it is recommended to cap the bottle with an automatic delivery pipette equipped
24、with a drying tube.5.3 Internal standard: isopropanol, of at least 99 % purity.5.4 Water, complying with grade 2 of ISO 3696, or better.5.5 Extraction solvent: methanol (5.2) containing 2,0 ml of internal standard (5.3) per litre.5.6 Desiccant: silica gel, freshly activated.5.7 Calibration solutions
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