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首页> 外文期刊>Electroanalysis >Sensitive differential pulse polarographic determination of molybdenum using the new catalytic system Mo(VI)-phenantroline-chlorate
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Sensitive differential pulse polarographic determination of molybdenum using the new catalytic system Mo(VI)-phenantroline-chlorate

机译：新的催化体系Mo（VI）-菲咯啉-氯酸盐灵敏微分脉冲极谱法测定钼

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摘要

It was found that in acidic chloride media the complex of Mo(VI) with 1,10-phenantroline induces catalytic reduction of KClO3. This catalytic effect can be utilized for sensitive differential pulse polarographic determination of Mo(VI) with a low detection limit of 2.9 x 10(-11) M (2.8 ng/L). The optimal Mo(Vl) response was obtained at pH 2.8, in the presence of (6-12) X 10(-5) M 1,10-phenantroline and 2 x 10(-2) M KClO3. ne sensitivity was 1.73 nAM and the catalytic response was linear up to 7.5 x 10(-7) M Mo (VI). The interferences from inorganic ions and surface-active substances were investigated. The results of the determination of Mo(Vl) in CRM water sample showed good reproducibility (R.S.D. for standard solution is below 1.2% and for water samples is 8.9%) and accuracy of the elaborated catalytic polarographic method.
机译：发现在酸性氯化物介质中，Mo（VI）与1,10-菲咯啉的络合物可诱导KClO3催化还原。这种催化作用可用于检测限为2.9 x 10（-11）M（2.8 ng / L）的Mo（VI）的灵敏差分脉冲极谱法测定。在（6-12）X 10（-5）M 1,10-菲咯啉和2 x 10（-2）M KClO3存在下，在pH 2.8时获得了最佳的Mo（VI）反应。 ne灵敏度为1.73 nA / nM，催化反应在7.5 x 10（-7）M Mo（VI）下呈线性关系。研究了无机离子和表面活性物质的干扰。 CRM水样品中Mo（VI）的测定结果显示出良好的重现性（标准溶液的R.S.D.低于1.2％，水样品的R.S.D.）和精密催化极谱法的准确性。

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