化学
乙醚
色谱法
二氯乙烷
钠
离子键合
萃取(化学)
气相色谱法
有机化学
离子
溶剂
出处
期刊:Analyst
[The Royal Society of Chemistry]
日期:1976-01-01
卷期号:101 (1200): 198-198
被引量:36
摘要
A method is proposed for the determination of polyoxyethylene alkylphenyl ethers, RO(CH2CH2O)nH (where R is an alkylphenyl group), at the 1–0.1 mg l–1 level in waters. The method is based on the spectrophotometric determination of the complexes of the polyethers with the sodium cation after extraction as picrates into 1,2-dichloroethane. The number-average degree of polymerisation (n) is evaluated by thin-layer chromatography or by gas chromatography.
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