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<p>A novel method for the simple and selective separation and trace detection of arsenic is described. Arsenic is efficiently extracted at pH 5.5 using 7-hydroxy-4-methylcoumarin hydroxyl amine (HMCHA) in dichloromethane, showing maximum absorbance at 395&#xa0;nm with a molar absorptivity (ε) of 1.21 × 10<sup>4</sup>&#xa0;L mol⁻<sup>1</sup>&#xa0;cm⁻<sup>1</sup>. The method follows Beer's law for concentrations between 0.99 and 8.916&#xa0;µg L⁻<sup>1</sup>. Sensitivity is enhanced 60-fold by directly injecting the extract into the plasma for ICP-MS analysis, allowing accurate estimation of trivalent arsenic. The extraction is unaffected by the presence of other ions, with no interference observed. The method's effectiveness is confirmed through the analysis of arsenic in alloys, water, biological, and environmental samples.</p>

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Solvent extraction and trace analysis of as (III) in alloys, biological, and environmental samples by spectrophotometry and ICP-MS

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月8日

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  • Chandramauly Sharma,
  • Kuldeep Sharma,
  • Pranav Trivedi,
  • Sujal Sharma,
  • Neha Yadav

摘要

A novel method for the simple and selective separation and trace detection of arsenic is described. Arsenic is efficiently extracted at pH 5.5 using 7-hydroxy-4-methylcoumarin hydroxyl amine (HMCHA) in dichloromethane, showing maximum absorbance at 395 nm with a molar absorptivity (ε) of 1.21 × 104 L mol⁻1 cm⁻1. The method follows Beer's law for concentrations between 0.99 and 8.916 µg L⁻1. Sensitivity is enhanced 60-fold by directly injecting the extract into the plasma for ICP-MS analysis, allowing accurate estimation of trivalent arsenic. The extraction is unaffected by the presence of other ions, with no interference observed. The method's effectiveness is confirmed through the analysis of arsenic in alloys, water, biological, and environmental samples.