DETERMINATION OF HYDROPHILIC THIOLS IN SEDIMENT POREWATER USING ION-PAIR LIQUID-CHROMATOGRAPHY COUPLED TO ELECTROCHEMICAL DETECTION

被引：51
|
作者：
SHEA, D [1 ]
MACCREHAN, WA [1 ]
机构：
[1] NBS, CTR ANALYT CHEM, GAITHERSBURG, MD 20899 USA
来源：
ANALYTICAL CHEMISTRY | 1988年 / 60卷 / 14期
关键词：
D O I：
10.1021/ac00165a020
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Twelve hydrophilic thiols in sediment porewater samples from the Chesapeake Bay were determined by reversed-phase high-performance liquid chromatography using trihaloacetate ion-pairing agents with amperometric detection at a mercury-film/gold electrode. The detection limit is about 2 pmol, and the precision is better than 3% at the 100-pmol level. Glassy carbon and bare gold electrodes were also examined but were found to have higher residual currents and were subject to more interferences than the mercury-film/gold electrode. The stability of thiols with respect to oxidation, in both standard solutions and samples, was also investigated under various conditions.
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页码：1449 / 1454
页数：6
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