期刊论文

Determination of triethylamine,diethylamine,ethylamine and ammonia in water by fixed dissociation-gas chromatography

Yang, Haijun(1227677453@qq.com)

中文

分析试验室

1000-0720

2021

40

08

932-936

10.13595/j.cnki.issn1000-0720.2020.113003

湖南省自然科学基金项目（2020JJ6057）资助；

本校为第一机构

建立了同时测定水中三乙胺、二乙胺、乙胺和氨4种物质的固定解离-气相色谱法。水样用H2SO4酸化,对三乙胺、二乙胺、乙胺及氨固定成盐,酸化后旋转蒸发掉水分,冰水浴下以甲醇为溶剂加入固体NaOH解离,以无水Na2SO4干燥,0.45μm滤膜过滤后进气相色谱测定。该方法峰面积和浓度的线性相关系数达到0.9992以上,检出限为0.03～0.10 mg/L、定量限为0.10～0.28 mg/L,在10,50和100 mg/L3个水平下添加回收率为89.9%～104.8%、相对标准偏差为0.70%～2.1%。该方法适用于乙胺类物质的生产废水及降解废水中三乙胺、二乙胺、乙胺和氨的同时检测。

A simultaneous determination method based on fixed dissociation-gas chromatography was established for triethylamine, diethylamine, ethylamine and ammonia in water. The water sample was acidified with 1 mol / L sulfuric acid to convert triethylamine, diethylamine, ethylamine and ammonia into salt forms. After that, the water was evaporated off by rotary evaporation. The residues were dissociated by solid sodium hydroxide using methanol as solvent on an ice water bath. After dried by an hydrous sodium sulfate, the obtained solution was filtrated...