✦ LIBER ✦

Flow-injection on-line fibre column separation and preconcentration system for efficient determination of trace gold in ores and metallurgical samples by flame atomic absorption spectrometry

✍ Scribed by Weiji Qi; Xing Wu; Chun Zhou; Haizhou Wu; Yingqi Gao

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 507 KB
Volume: 270
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)80108-j

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✦ Synopsis

A flow-injection on-line 8531 fibre column separation and preconcentration system is proposed for the efficient flame atomic absorption spectrometric determination of trace gold in ores and metallurgical samples. A flow manifold with a pump and two valves was assembled to conduct the operating cycle of equilibration-preconcentration-washing-elution automatically in sequence. It was found that 8531 fibre is selective for gold and possesses good flow properties. A 40 mm long column is recommended. The detection limit (3o-) of the proposed method was 0.2 ng ml I gold and the relative standard deviation was 6% (n = 11) for 1 ng ml 1 and 2.2% (n = 7) for 80 ng m1-1 gold. About 40-60 injections can be performed per hour. The method was proved to be suitable for the routine determination of trace gold above 0.01 g t-1 in ores and metallurgical samples with satisfactory accuracy and precision.

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