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Application of Internal Standard to Rapid Co-precipitation Technique for Preconcentration and FAAS Determination of Cadmium in Salts

Longwu Chen

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Abstract

A method was proposed for the determination of trace cadmium in salts by flame atomic absorption spectrometry after rapid co-precipitation with PAN-Ni(Ⅱ) at pH=9.0. Mn(Ⅱ) was added as an internal standard. When the sample volume was 100 mL, the standard addition recoveries of cadmium were 96%~101%. The detection limit was 5.7 μg/L with precision of less than 5% RSD (n=6). The matrix effect can be eliminated by the method. The results were satisfactory.

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What this paper is about

A method was proposed for the determination of trace cadmium in salts by flame atomic absorption spectrometry after rapid co-precipitation with PAN-Ni(Ⅱ) at pH=9.0. Mn(Ⅱ) was added as an internal standard. When the sample volume was 100 mL, the standard addition recoveries of cadmium were 96%~101%. The detection limit was 5.7 μg/L with precision of less than 5% RSD (n=6). The matrix effect can be eliminated by the method. The results were satisfactory.

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Available abstract

A method was proposed for the determination of trace cadmium in salts by flame atomic absorption spectrometry after rapid co-precipitation with PAN-Ni(Ⅱ) at pH=9.0. Mn(Ⅱ) was added as an internal standard. When the sample volume was 100 mL, the standard addition recoveries of cadmium were 96%~101%. The detection limit was 5.7 μg/L with precision of less than 5% RSD (n=6). The matrix effect can be eliminated by the method. The results were satisfactory.

Key concepts: Cadmium, Detection limit, Chemistry, Precipitation, Atomic absorption spectroscopy, Standard addition, Matrix (chemical analysis), Internal standard

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Application of Internal Standard to Rapid Co-precipitation Technique for Preconcentration and FAAS Determination of Cadmium in Salts — Research Paper | ScholarLens