✦ LIBER ✦

Automatic on-line preconcentration system for graphite furnace atomic absorption spectrometry for the determination of trace metals in sea water

✍ Scribed by Zhen-Shan Liu; Shang-Da Huang

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 444 KB
Volume: 281
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(93)85353-l

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✦ Synopsis

An automatic on-line preconcentration system for graphite furnace atomic absorption spectrometty (GFAAS) for the determination of trace metals in sea water was developed. This system was modified from a Perkin-Elmer AS-40 autosampler by mounting a silica gel Crs microcolumn near the tip of the automsampler capillary. The preconcentration procedure was performed by using the pumps of the AS-40 autosampler and a four-way valve and controlled by a programmable controller. The chelating agent ammonium tetramethylenedithiocarbamate [ammonium pyrrolidinedithiocarbamate (APDCI] was added to the sample solution and only 0.2-2 ml of sample was required to determine cadmium and copper in sea water. The calibration graph method was used and the detection limits of cadmium and copper were 1.26 and 6.5 ng l-t, respectively.

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