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  • SH/T 1784-2015 - 中外标准 - - 2015/7 - 现行
    本标准规定了用气相色谱法测定工业用异戊二烯(聚合级)中的微量抽提剂二甲基甲酰胺和乙腈。 本标准适用于测定工业用异戊二烯(聚合级)中含量不低于0.5mg/kg的二甲基甲酰胺或不低于1.0mg/kg的乙腈。
  • ASTM D4874-1995(2014) - 中外标准 - - 2014/5 - 现行
    column leachleachatewaste leaching technique
  • ASTM D4864-2014 - 中外标准 - - 2014/7 - 现行
    gas chromatographymethanolpropylene
  • ASTM D1240-2014 - 中外标准 - - 2014/7 - 现行
    fatty acidsGlidden methodpine chemicalsrosintall oiltall oil fatty acidtall oil rosinWolfe Method
  • ASTM D1240-2012 - 中外标准 - - - 作废
    脂肪酸格利登方法松脂松香妥尔油妥尔油脂肪酸妥尔油松香沃尔夫方法fatty acidsGlidden methodpine chemicalsrosintall oiltall oil fatty acidtall oil rosinWolfe Method
  • ASTM D1157-1991(2014) - 中外标准 - - 2014/5 - 现行
    light hydrocarbonsoxidation inhibitorp-tertiary butylcatecholphotometer
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    GB/T 30921.1-2014 - 中外标准 - - 2014/7 - 现行
    本部分规定了测定工业用精对苯二甲酸(PTA)中对羧基苯甲醛(4-CBA)和对甲基 苯甲酸(P-TOL)含量的高效液相色谱法和高效毛细管电泳法。 本部分规定的高效液相色谱法适用于4-CBA和p-TOL的含量分别在2 mg/kg和10 mg/kg以上 的精对苯二甲酸试样的测定;高效毛细管电泳法适用于4-CBA和p-TOL的含量分别在1 mg/kg和 5 mg/kg以上的精对苯二甲酸试样的测定。
  • BS 6392-4-1983 - 中外标准 - - - 现行
    This Part of BS 6392 describes a visual colorimetric method for the determination of the aldehydes content of ethanol for industrial use. The method is applicable to products having aldehyde con-tents, expressed as acetaldehyde, in the range 0,000 25 to 0,001 25 % (m/m). NOTE —The title of the publication referred to in this standard is given on page 3.
    安全措施工业的醛(脂族)乙醇染色试验含量测定比较试验化学分析和试验ColorimetryDetermination of contentEthanolEthyl alcoholIndustrial productsTestingTests
  • NF T20-592-1966 - 中外标准 - - - 废止
  • ASTM D4737-2010 - 中外标准 - - - 现行

    The Calculated Cetane Index by Four Variable Equation is useful for estimating ASTM cetane number when a test engine is not available for determining this property directly and when cetane improver is not used. It may be conveniently employed for estimating cetane number when the quantity of sample available is too small for an engine rating. In cases where the ASTM cetane number of a fuel has been previously established, the Calculated Cetane Index by Four Variable Equation is useful as a cetane number check on subsequent batches of that fuel, provided the fuel''s source and mode of manufacture remain unchanged.

    Note 28212;Test Methods D6890 and D7170 may be used to obtain a Derived Cetane Number (DCN) when the quantity of sample is too small for an engine test. These methods do measure the effect of cetane improver.

    Within the range from 32.5 to 56.5 cetane number, the expected error of prediction of Procedure A of the Calculated Cetane Index by Four Variable Equation will be less than x00B1;2 cetane numbers for 65 % of the distillate fuels evaluated. Errors may be greater for fuels whose properties fall outside the recommended range of application.

    1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery temperature measurements. The value computed from the equation is termed the Calculated Cetane Index by Four Variable Equation.

    1.2 The Calculated Cetane Index by Four Variable Equation is not an optional method for expressing ASTM cetane number. It is a supplementary tool for estimating cetane number when a result by Test Method D613 is not available and if cetane improver is not used. As a supplementary tool, the Calculated Cetane Index by Four Variable equation must be used with due regard for its limitations.

    1.3 Procedure A is to be used for Specification D975, Grades No. 1x2013;D S15, No. 1x2013;D S500, No. 1x2013;D S5000, No. 2x2013;D S15, No. 2x2013;D S5000, and No. 4x2013;D. This method for estimating cetane number was developed by Chevron Research Co. Procedure A is based on a data set including a relatively small number of No. 1x2013;D fuels. Test Method D4737 Procedure A may be less applicable to No. 1x2013;D S15, No. 1x2013;D S500, and No. 1x2013;D S5000 than to No. 2x2013;D grade S5000 or to No. 4x2013;D fuels.

    1.3.1 Procedure A has been verified as applicable to Grade No. 2x2013;D S15 diesel fuels.

    1.4 Procedure B is to be used for Specification D975, Grade No. 2x2013;D S500.

    1.5 The test method x201C;Calculated Cetane Index by Four Variable Equationx201D; is particula......

    cetanecetane indexdiesel fuelCalculated Cetane Index (CCI)Density--petroleum productsDistillate fuelsDistillation--petroleum productsFour variable equationFuel oilsNonpetroleum derivatives (of fuel)ShaleTar sands
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