DIN 51422-2-2004 Testing of mineral products - Determination of grade of purity by gaschromatography - Part 2 Cetane and 1-Methyl-naphthaline《矿产品的检验 用气相色普法测定纯度的等级 第2部分 正十六烷和1-甲萘》.pdf
《DIN 51422-2-2004 Testing of mineral products - Determination of grade of purity by gaschromatography - Part 2 Cetane and 1-Methyl-naphthaline《矿产品的检验 用气相色普法测定纯度的等级 第2部分 正十六烷和1-甲萘》.pdf》由会员分享,可在线阅读,更多相关《DIN 51422-2-2004 Testing of mineral products - Determination of grade of purity by gaschromatography - Part 2 Cetane and 1-Methyl-naphthaline《矿产品的检验 用气相色普法测定纯度的等级 第2部分 正十六烷和1-甲萘》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、DEUTSCHE NORM51422-2Translation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text. No part of this translation may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 B
2、erlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).September 2004Testing of petroleum productsGas chromatographic determination of thepurity of cetane and 1-methylnaphthaleneDocument comprises 4 pages.ICS 75.080Prfung von Minerallerzeugnissen Gaschromatographische Besti
3、mmung des Reinheitsgrades Teil 2: Cetan und 1-MethylnaphthalinEnglish price group 6www.din.dewww.beuth.de03.06 9672914In this standard, % (m/m) is used to mean percentage by mass.ForewordThis standard has been prepared by Technical Committee Chromatographische Analyse of the Fachaus-schuss Minerall-
4、 und Brennstoffnormung of the Normenausschuss Materialprfung (Materials Testing Standards Committee).DIN 51422 Testing of petroleum products Gas chromatographic determination of the purity consists of the following Parts:Part 1: n-heptane, isooctane and toluenePart 2: Cetane and 1-methylnaphthaleneA
5、mendmentsThis standard differs from the January 1975 edition as follows:a) The standard has been editorially revised.b) The normative references have been updated.c) The reagents have been more precisely specifi ed.Previous editionDIN 51422-2: 1975-011 ScopeThis standard specifi es a method of deter
6、mining the purity of more than 95 % (m/m) pure cetane (n-hexade-cane) and 1-methylnaphthalene used as reference fuels for determining the ignition quality (cetane number) of diesel fuels (e.g. as specifi ed in DIN 51773). The purity of these reference fuels affects the accuracy of the determination
7、of the cetane number.2 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These nor-mative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent
8、 amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies (including amendments).DIN 51405 Testing of liquid petroleum products, related liqu
9、ids and solvents for paints and varnishes by gas chromatography GeneralDIN 51750-1 Sampling of petroleum products GeneralSupersedesJanuary 1975 edition.Page 2DIN 51422-2:2004-09DIN 51750-2 Sampling of liquid petroleum productsDIN 51773 Determination of ignition quality (cetane number) of diesel fuel
10、s using the BASF engineDIN EN ISO 4259 Petroleum products Determination and application of precision data in relation to methods of test (ISO 4259:1992 + Corr 1:1993)3 PrincipleA sample is analysed by injecting it in liquid form into a gas chromatographic column containing a suitable liquid as stati
11、onary phase. It is conveyed through the column by an inert gas and separated into its individual components. The signals due to the latter are recorded by a detector as they emerge from the column. The content of the main component is reported as a percentage by mass.4 Apparatus and reagentsThe foll
12、owing equipment and reagents shall be used.4.1 Gas chromatograph, having a liquid sample inlet, a suitable detector (e.g. a fl ame ionisation detector as in DIN 51405) and a suitable recording and evaluation unit.4.2 Separating columns, having a recommended column length of 50 m and an internal diam
13、eter of about 0,25 mm. Any capillary column that meets the requirements specifi ed in subclause 5.2 may be used as sepa-rating column.Apiezon L and polyphenyl ether OS 138 have in practice been found to be satisfactory stationary phases for cetane and 1-methylnaphthalene, respectively. Equally suita
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