ASTM D2959-1995(2017)
聚氧乙烯类非离子表面活性剂中环氧乙烷含量的标准试验方法
Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic Surfactants
- 适用范围
1.1x00a0;This test method covers the determination of ethylene oxide in polyethoxylated nonionic surfactants. It can also be used for compounds containing propylene oxide or any compounds (glycols and glycol and polyglycol ethers and esters) which form unstable 1,2-diiodides on reaction with hydriodic acid.
Note 1:x00a0;Compounds in which the oxyalkylene group is connected to a nitrogen cannot be entirely decomposed. This can be used to determine the percent of an ethoxylated surfactant in a mixture, if the ethylene oxide content of the ethoxylated surfactant is known.
Note 2:x00a0;This method reports results as percent ethylene oxide. If this method is applied to unknown compounds or compositions, the analyst should be aware of the possible presence of material other than ethylene oxide.
Note 3:x00a0;For use on built syndet compositions the organic active ingredient must be isolated in accordance with Test Method D2358.
1.2x00a0;The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3x00a0;This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.