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Online sample pretreatment systems for determination of cadmium by the ETAAS method

机译：ETAAS方法在线测定镉的在线样品预处理系统

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Trace and ultratrace determinations of cadmium in environmental and biological samples have become of increasing interest due to the high toxicity of this metal and because electrothermal atomic absorption spectrometry is probably the method of choice for its determination. The measured signals are, however, inherently very susceptible to the composition of the sample matrix and notably to variation within it. The most effective way to avoid these problems is to perform appropriate sample pretreatment such as preconcentration and separation. Such procedures are most advantageously performed in flow systems where all unit operations can be executed online. This paper reviews selected systems, such as solid-phase extraction, liquid-liquid extraction, coprecipitation and chemical vapor generation using to improve sample pretreatment for cadmium determination.
机译：由于该金属的高毒性以及电热原子吸收光谱法可能是测定其的选择方法，因此环境和生物样品中痕量和超痕量镉的测定已引起越来越多的关注。然而，所测量的信号固有地非常容易受到样品基质的成分的影响，尤其是其内部的变化。避免这些问题的最有效方法是执行适当的样品预处理，例如预浓缩和分离。在所有单元操作都可以在线执行的流程系统中，最有利地执行这样的过程。本文回顾了一些用于改进镉测定样品预处理的系统，例如固相萃取，液-液萃取，共沉淀和化学蒸气生成。

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