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A sweeping‐micellar electrokinetic chromatography method for direct detection of some aromatic amines in water samples
Author(s) -
Zhang Jianhua,
Wu Xiaoping,
Zhang Wei,
Xu Liangjun,
Chen Guonan
Publication year - 2008
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200700478
Subject(s) - detection limit , micellar electrokinetic chromatography , chromatography , chemistry , correlation coefficient , electrokinetic phenomena , linear range , linear correlation , analytical chemistry (journal) , mathematics , statistics
A simple and rapid sweeping method for the online improvement of detection limit of some aromatic amines has been developed in this work. The optimum sweeping and separation conditions for 4‐methylaniline, 3,4‐dichloroaniline, 4‐chloroaniline, and 4‐aminophenyl were investigated in detail. Under the optimum conditions, the detection limits of these four aromatic amines ranged from 5.4×10 −10 to 4.6×10 −8 mol/L (S/N = 3), which was about 80–1090‐folds lower than those of conventional sample injections. Linear response range were in the range of 2.5×10 −8 –2.0×10 −6 mol/L with the correlation coefficient between 0.9965 and 0.9994. Baseline separation was achieved within 10 min. After validation, the developed method was applied to determine 4‐methylaniline, 3,4‐dichloroaniline, 4‐chloroaniline, and 4‐aminophenyl in river water sample with average recoveries of 79.6–88.7%.