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Determination of Trace Cadmium in Water by Atomic Absorption Spectrometry after Cloud Point Extraction

Wenjun Le

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Abstract

A new atomic absorption spectrometry after cloud point extraction method for the determination of trace cadmium was developed.The method was based on the fact of cloud-point extracted chelate engendered by 5-Br-PADAP and cadmium.The linear range for the determination of Cd2+ was cCd(Ⅱ)=0.25～4.00 μg/L and the detection limit found was LCd(Ⅱ)=6.7 μg/L and RSD(n=11) was 2.7%.The values of recovery of Cd in natural water samples were 98.5%～102.3%.

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What this paper is about

A new atomic absorption spectrometry after cloud point extraction method for the determination of trace cadmium was developed.The method was based on the fact of cloud-point extracted chelate engendered by 5-Br-PADAP and cadmium.The linear range for the determination of Cd2+ was cCd(Ⅱ)=0.25～4.00 μg/L and the detection limit found was LCd(Ⅱ)=6.7 μg/L and RSD(n=11) was 2.7%.The values of recovery of Cd in natural water samples were 98.5%～102.3%.

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Available abstract

A new atomic absorption spectrometry after cloud point extraction method for the determination of trace cadmium was developed.The method was based on the fact of cloud-point extracted chelate engendered by 5-Br-PADAP and cadmium.The linear range for the determination of Cd2+ was cCd(Ⅱ)=0.25～4.00 μg/L and the detection limit found was LCd(Ⅱ)=6.7 μg/L and RSD(n=11) was 2.7%.The values of recovery of Cd in natural water samples were 98.5%～102.3%.

Key concepts: Cloud point, Cadmium, Detection limit, Extraction (chemistry), Chemistry, Atomic absorption spectroscopy, Analytical Chemistry (journal), Trace Amounts

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