An Improvement of Slotted Quartz Tube Flame Atomiation Technique

Abstract

Abstract: The slotted quartz tube atom-trapping technique with a high sensitivity is reported in the paper.The effects of various conditions (flame status,air flow,collection time,medium of solution and slotted tube height etc.) on the sensitivity of cadmium was investigated in detail.The results shew that the best sensitivity is obtained when fuel-lean and fuel-rich flames are respectively used for collection and release.The characteristic concentration of 3.7×10^-5μg/mLwas obtained for 0.4 ng/mLof cadmium solution being trapped for 1 min.The sensitivity of cadmium may be increased 270-fold in comparison with the convention flame atomic absorption spectrometry.The coefficient of variation is 4.1 % for 0.4 ng/mLcadmium solution after trapping for 1 min (n=11).The cadmium in taxodium ascenders has been determined directly.

Key words: Cadmium, Atom-trapping, Slotted tube atomization, Atomic absorption spectrometry

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HUANG Gan-Quan, LI Yun-Qing . An Improvement of Slotted Quartz Tube Flame Atomiation Technique[J]. Chem. J. Chinese Universities, 1992, 13(8): 1057.

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An Improvement of Slotted Quartz Tube Flame Atomiation Technique

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