期刊
ULTRASONICS SONOCHEMISTRY
卷 12, 期 3, 页码 225-232出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2003.10.010
关键词
ultrasonic extraction; probe and bath systems; elemental analysis; ETAAS
Ultrasonic solid-liquid extraction (USLE) of trace metals from biological and environmental samples and its subsequent quantification by electrothermal atomic absorption spectrometry (ET-AAS) is nowadays an emerging methodology in the analytical laboratory. However, this methodology is far from maturity as can be readily demonstrated from the controversial data reported by different workers. In the light of our own experience and a survey of published data, a general approach for USLE-ET-AAS is discussed, taking into account the different variables which affect ultrasonic solid-liquid extraction, namely, the ultrasonic device chosen for ultrasonic extraction (e.g. ultrasonic bath or ultrasonic probe), particle size, acid concentration, sonication time and sonication amplitude, sample mass and analyte-matrix binding. (C) 2003 Elsevier B.V. All rights reserved.
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