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Determination of Trace Cadmium in Rock and Soil Samples by Graphite Furnace Atomic Absorption Spectrometry

Jingjing Liu

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Abstract

A method for the determination of trace cadmium in rock and soil samples by graphite furnace atomic absorption spectrometry(GFAAS) was developed.The samples were decomposed by aqua regia-perchloric acid,and trace cadmium in perchloric acid medium was then directly determined by GFAAS without any separation,pre-concentration and without any matrix modifier.The conditions for sample decomposition,temperature of ashing and atomization in GFAAS determination were optimized.The detection limit of the method for cadmium is 0.0066 μg/g with precision of less than 8.0%RSD(n=12).The method provides the advantages of simple operation,high efficiency,accuracy,and suitable for the determination of trace cadmium in bulk rock and soil samples.

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What this paper is about

A method for the determination of trace cadmium in rock and soil samples by graphite furnace atomic absorption spectrometry(GFAAS) was developed.The samples were decomposed by aqua regia-perchloric acid,and trace cadmium in perchloric acid medium was then directly determined by GFAAS without any separation,pre-concentration and without any matrix modifier.The conditions for sample decomposition,temperature of ashing and atomization in GFAAS determination were optimized.The detection limit of the method for cadmium is 0.0066 μg/g with precision of less than 8.0%RSD(n=12).The method provides the advantages of simple operation,high efficiency,accuracy,and suitable for the determination of trace cadmium in bulk rock and soil samples.

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Available abstract

A method for the determination of trace cadmium in rock and soil samples by graphite furnace atomic absorption spectrometry(GFAAS) was developed.The samples were decomposed by aqua regia-perchloric acid,and trace cadmium in perchloric acid medium was then directly determined by GFAAS without any separation,pre-concentration and without any matrix modifier.The conditions for sample decomposition,temperature of ashing and atomization in GFAAS determination were optimized.The detection limit of the method for cadmium is 0.0066 μg/g with precision of less than 8.0%RSD(n=12).The method provides the advantages of simple operation,high efficiency,accuracy,and suitable for the determination of trace cadmium in bulk rock and soil samples.

Key concepts: Graphite furnace atomic absorption, Aqua regia, Cadmium, Ashing, Chemistry, Detection limit, Analytical Chemistry (journal), Atomic absorption spectroscopy

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Determination of Trace Cadmium in Rock and Soil Samples by Graphite Furnace Atomic Absorption Spectrometry — Research Paper | ScholarLens