The design of an on-line flow injection system with a gravitational phase separator for flame atomic absorption spectrometry and its analytical performance.
A liquid-liquid flow extraction system associated with a specifically designed phase separator has been developed. A common trisectional confluence connector was used for segmentation. The system was connected on-line with a flame atomic absorption spectrometer. The performance of the system was studied with respect to determining copper and gold. The detection limits were 1 mug/l. for copper and 1.8 mu/1. for gold, and the precision was 1.8 and 2.5%, respectively, with medium signal enhancement factor 70 for gold, and 78 for copper. Analytical results of real sample analysis were in good agreement with certified values.
Lin
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Department of Applied Chemistry, China University of Geosciences, Wuhan 430074, People's Republic of China.
Hwang
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