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2004•Chinese Journal of Spectroscopy LaboratoryRequires access

Solid Phase Extraction and Spectrophotometric Determination of Cadmium with 2-(2-Quinolinylazo)-Resorcin

Xie Qi

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Abstract

In the presence of pH=8.0 buffer solution and Triton X-100 medium,2-(2-quinolinylazo)-resorcin(QAR) reacts with cadmium(Ⅱ) and forms a 2∶1 complex(QAR∶Cd(Ⅱ)) with the molar absorptivity of 6.88×10 4L·mol -1·cm -1 at 545nm.Beer's law is obeyed in range of 0—1.0μg/mL.The cadmium ion in samples was enriched and separated by solid phase extraction with anion exchange resin cartridge before determination.This method was applied to the determination of cadmium in water and food with good results.

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What this paper is about

In the presence of pH=8.0 buffer solution and Triton X-100 medium,2-(2-quinolinylazo)-resorcin(QAR) reacts with cadmium(Ⅱ) and forms a 2∶1 complex(QAR∶Cd(Ⅱ)) with the molar absorptivity of 6.88×10 4L·mol -1·cm -1 at 545nm.Beer's law is obeyed in range of 0—1.0μg/mL.The cadmium ion in samples was enriched and separated by solid phase extraction with anion exchange resin cartridge before determination.This method was applied to the determination of cadmium in water and food with good results.

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Available abstract

In the presence of pH=8.0 buffer solution and Triton X-100 medium,2-(2-quinolinylazo)-resorcin(QAR) reacts with cadmium(Ⅱ) and forms a 2∶1 complex(QAR∶Cd(Ⅱ)) with the molar absorptivity of 6.88×10 4L·mol -1·cm -1 at 545nm.Beer's law is obeyed in range of 0—1.0μg/mL.The cadmium ion in samples was enriched and separated by solid phase extraction with anion exchange resin cartridge before determination.This method was applied to the determination of cadmium in water and food with good results.

Key concepts: Cadmium, Molar absorptivity, Chemistry, Extraction (chemistry), Solid phase extraction, Ion-exchange resin, Buffer solution, Cartridge

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