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摘 要:建立了小量水样痕量苯酚的液-液微萃取气相色谱分析法。考查了乙酸乙酯在酸和盐的作用下对苯酚的萃取性能,优化了萃取过程。采用FID检测器、WBI-17直接进样口和DB-1宽口径弹性石英毛细管柱,通过快速进样和汽化室内填装适当的玻璃棉可以得到满意的定量精密度。8mL水样、160μL乙酸乙酯、3.5g硫酸铵可获得1μg/L的检测下限,加标回收率为95.0%~98.5%,RSD为2.8%~3.3%。
Abstract:A
method for the liquid-liquid micro-extraction and gas chromatographic
analysis of trace phenol in small amount of aqueous sample has been
developed. The
influences of acid and salts on recovery rate of phenol were examined.
And, the influences of
injection speeds and the conditions of silica wool in injection port on
the quantitation precision were tested. With
a direct injection port, an FID and a DB-1 capillary column of wide
bore, a detection limit of 1 μg.L-1
can be obtained employing 8 mL water sample, 160 μL
ethyl acetate and 3.5
g ammonium sulfate. The
added recoveries were in the range of 95.0%-98.5%.
The relative standard
deviations were in the range of 2.8%-3.3%.
This method is simple,
convenient, rapid, accurate and practical. |
基金项目:国家自然科学基金资助项目(59479020) 作者简介:张爱丽(1958-),女,工程师,大连理工大学环境科学与工程学院,电话:(0411)3631333-3266。 作者单位:张爱丽(大连理工大学环境科学与工程学院,辽宁大连 116012) 周集体(大连理工大学环境科学与工程学院,辽宁大连 116012) 韩梅(大连理工大学环境科学与工程学院,辽宁大连 116012) 滕丽曼(大连理工大学环境科学与工程学院,辽宁大连 116012) 黄丽萍(大连理工大学环境科学与工程学院,辽宁大连 116012) 王栋(大连理工大学环境科学与工程学院,辽宁大连 116012) 王竞(大连理工大学环境科学与工程学院,辽宁大连 116012) 参考文献: [1]Chinese Environment Protection Agency.
Analysis meth-od for monitoring water and waste water.Third
edition.Beijing:Environmental Science Press in China,1989.411-412国家环保局.水和废水监测分析方法.第3版.
北京:中国环境科学出版社,1989.411-412 |
原载于《色谱》2001 Vol.19 No.2
P.144-146
http://periodical.wanfangdata.com.cn/periodical/sp/sp2001/0101/0101ml.htm