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Immobilized Chloroxine as a Preconcentration Reagent for Atomic Absorption Spectrometry

✍ Scribed by H.A.M. Elmahadi; G.M. Greenway

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
71 KB
Volume
53
Category
Article
ISSN
0026-265X

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✦ Synopsis

A flow injection system combining on-line preconcentration with immobilized chloroxine and spectrophotometric detection was developed for trace metal determination. The chloroxine was immobilized onto a silanized control pore glass substrate which showed excellent stability. The reagent was packed into a minicolumn and used to preconcentrate Cu 2+ , Zn 2+ , Cd 2+ , Co 2+ , and Pb 2+ . The enhancement in sensitivity was on the order of 49-136 times better than that for direct injection, using a 5-ml sample with a sampling rate of 20 h -1 .

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