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Determination of trace amouts of zinc in water samples by cloud point extraction-flame atomic absorption spectrometry

MU Hai-yan

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Abstract

Using 1-(2-pyridylazo)-2-naphthol(PAN)as chelating agent,Triton X-114 as nonionic surfactant,and HNO3-methnol as regulator of viscosity,the determination conditions of zinc by cloud point extraction-flame atomic absorption spectrometry(CPE-FAAS) method were optimized.Under the optimal conditions,the detection limit of zinc was 0.687 μg/L.The enrichment factor was 66-fold for zinc.The proposed method was successfully applied to the determination of trace quantities of zinc in water samples,with the satisfactory recoveries ranging from 95 % to 102%.

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What this paper is about

Using 1-(2-pyridylazo)-2-naphthol(PAN)as chelating agent,Triton X-114 as nonionic surfactant,and HNO3-methnol as regulator of viscosity,the determination conditions of zinc by cloud point extraction-flame atomic absorption spectrometry(CPE-FAAS) method were optimized.Under the optimal conditions,the detection limit of zinc was 0.687 μg/L.The enrichment factor was 66-fold for zinc.The proposed method was successfully applied to the determination of trace quantities of zinc in water samples,with the satisfactory recoveries ranging from 95 % to 102%.

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Available abstract

Using 1-(2-pyridylazo)-2-naphthol(PAN)as chelating agent,Triton X-114 as nonionic surfactant,and HNO3-methnol as regulator of viscosity,the determination conditions of zinc by cloud point extraction-flame atomic absorption spectrometry(CPE-FAAS) method were optimized.Under the optimal conditions,the detection limit of zinc was 0.687 μg/L.The enrichment factor was 66-fold for zinc.The proposed method was successfully applied to the determination of trace quantities of zinc in water samples,with the satisfactory recoveries ranging from 95 % to 102%.

Key concepts: Cloud point, Zinc, Detection limit, Extraction (chemistry), Chemistry, Atomic absorption spectroscopy, Trace Amounts, Enrichment factor

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