ASTM E611-2008(2015)e1
采用气相色谱法测定乙二醇中低浓度二甘醇的标准试验方法

Standard Test Methods for Low Concentrations of Diethlyene Glycol in Ethylene Glycol by Gas Chromatography

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 ASTM E611-2008(2015)e1 前三页，或者稍后再访问。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

ASTM E611-2008(2015)e1

发布日期

2008年

实施日期

废止日期

无

发布单位

US-ASTM

适用范围

3.1x00a0;Either test method may be used to determine the concentrations of diethylene glycol in ethylene glycol. The concentrations of the components are obtained by a normalization technique, based on the assumption that all components are eluted under the conditions used. If all components should not be eluted, the calculated concentrations will be erroneously high, with the major component showing the most significant absolute error. Since water is not detected by these procedures, the results are on a water-free basis. Water may be determined in accordance with the applicable sections of Test Methods E202 and the gas chromatographic results corrected for the water concentration.

3.2x00a0;Both test methods are currently in industrial use. Test Method A is the simpler of the two test methods because it does not require the preparation of derivatives prior to gas chromatographic analysis. The results obtained by Test Method A are slightly more accurate than those obtained by Test Method B. With respect to precision there is no significant difference between the two test methods. Test Method B has been reported to be suitable also for the analysis of a wide variety of glycol ethers, but this use is beyond the scope of this standard.

1.1x00a0;These test methods are intended primarily for the analysis of mixtures of ethylene and diethylene glycols in which the diethylene glycol concentration is 0.18201;% or less. Both test methods should be applicable to higher concentrations of diethylene glycol, but precision and bias estimates have been obtained only for 0.05 to 0.18201;% diethylene glycol.

Note 1:x00a0;Test Methods E202 describe another gas chromatographic test method applicable to mixtures of ethylene, diethylene, and triethylene glycols and mixtures of propylene, dipropylene, and tripropylene glycols in which one of the glycols is the principal component and the other two are present in concentrations of 0.1 to 18201;% each.

Note 2:x00a0;Test Method E2409 describes another gas chromatographic test method for the determination of glycol impurities in mono-, di-, tri- and tetraethylene glycol (MEG, DEG, TEG and TeEG) in the range of 5 to 3000 x03bc;g/g.

1.2x00a0;The two test methods are given as follows:

x00a0;	Sections
Test Method Ax2014;Nonderivative Method	5 to 13
Test Method Bx2014;Derivative Met...... ASTM E611-2008(2015)e1 中可能用到的仪器设备 气相色谱仪GC Copyright ©2007-2022 ANTPEDIA, All Rights Reserved 京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证：京ICP证110310号