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1 引 言 钼是人体必需微量元素,有着重要的生理作用.关于钼的电化学分析测定,早有报道,而生物样品中钼的电化学分析测定,报道较少.经反复实验摸索,发现降低 H2SO4的酸度,Mo(Ⅵ)之峰电位负移;加入 Na2SO4,使工作曲线与实际样品测定之峰电位与峰形完全一致.故将 0.25 mol/L H2SO4-1.5％苦杏仁酸-15％ Na-ClO3体系改进为:pH=1.5(H2SO4)-0.11 mol/L Na2SO4-0.048 mol/L 苯羟乙酸-0.63 mol/L NaClO3体系,用于测定天然椰子汁、茉莉花、黛黛花、茶叶、人发等生物样品中痕量钼的测定,取得了令人满意的结果.
1 Introduction Molybdenum is an essential trace element of the human body, has an important physiological role.As for the electrochemical determination of molybdenum has long been reported, and the electrochemical determination of molybdenum in biological samples, less reported.After repeated experiments to explore and found to reduce H2SO4 , The peak potential of Mo (Ⅵ) shifted negatively; adding Na2SO4, the peak potential and peak shape of the working curve and the actual sample were exactly the same, so 0.25 mol / L H2SO4-1.5% mandelic acid-15% Na- ClO3 system is improved to: pH = 1.5 (H2SO4) -0.11 mol / L Na2SO4-0.048 mol / L phenylacetic acid -0.63 mol / L NaClO3 system for the determination of natural coconut milk, jasmine, daisy, tea, human hair And other biological samples of trace molybdenum determination, and achieved satisfactory results.