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Determination of Trace Cadmium in Surface Water by Graphite Furnace Atomic Absorption Spectrometry with Multiple Injections for Concentration

Chenyi Wang

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Abstract

A method for the determination of trace cadmium in surface water by graphite furnace atomic absorption spectrometry with multiple injections for concentration was developed.The matrix modification of four matrix modifiers was studied,and it was found that by the addition of NH4NO3-PdCl2 as matrix modifier the ash temperature and determination sensitivity were improved.The detection limit of cadmium was 0.06 ng·mL-1(3σ).The recovery was in the range of 96.0%~103% with relative standard deviations ranging from 3.4% to 7.1%(n=6).The concentration of cadmium in Tiaoxi river water was measured to be 0.2 μg·L-1.

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What this paper is about

A method for the determination of trace cadmium in surface water by graphite furnace atomic absorption spectrometry with multiple injections for concentration was developed.The matrix modification of four matrix modifiers was studied,and it was found that by the addition of NH4NO3-PdCl2 as matrix modifier the ash temperature and determination sensitivity were improved.The detection limit of cadmium was 0.06 ng·mL-1(3σ).The recovery was in the range of 96.0%~103% with relative standard deviations ranging from 3.4% to 7.1%(n=6).The concentration of cadmium in Tiaoxi river water was measured to be 0.2 μg·L-1.

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Available abstract

A method for the determination of trace cadmium in surface water by graphite furnace atomic absorption spectrometry with multiple injections for concentration was developed.The matrix modification of four matrix modifiers was studied,and it was found that by the addition of NH4NO3-PdCl2 as matrix modifier the ash temperature and determination sensitivity were improved.The detection limit of cadmium was 0.06 ng·mL-1(3σ).The recovery was in the range of 96.0%~103% with relative standard deviations ranging from 3.4% to 7.1%(n=6).The concentration of cadmium in Tiaoxi river water was measured to be 0.2 μg·L-1.

Key concepts: Chemistry, Graphite furnace atomic absorption, Cadmium, Detection limit, Matrix (chemical analysis), Atomic absorption spectroscopy, Graphite, Mass spectrometry

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