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首页> 外文期刊>Analytica chimica acta >DETERMINATION OF COPPER, LEAD AND CADMIUM IN WHOLE BLOOD BY STRIPPING VOLTAMMETRY WITH THE USE OF GRAPHITE ELECTRODES
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DETERMINATION OF COPPER, LEAD AND CADMIUM IN WHOLE BLOOD BY STRIPPING VOLTAMMETRY WITH THE USE OF GRAPHITE ELECTRODES

机译：石墨电极溶出伏安法测定血液中铜，铅，镉和镉。

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The problem with toxic metal ion determination in blood is the adsorption of organic compounds on the electrode surface and the formation of complexes between metal ions and organic constituents of blood. This is the reason why usually preliminary acid digestion or other sample pretreatment is used. Two kinds of electrodes have been used: ''Ultra-Trace Electrode'', made from impregnated graphite (I), and thick film graphite disposable electrodes (II). The analysis of whole blood with different sample preparation methods shows, that chemical digestion is not necessary for the analysis. Electrochemical two-stage sample preparation provides the possibility for analysing whole blood with the mentioned electrodes. Thick film disposable electrodes are less sensitive to the interference of organic constituents of blood. These electrodes give the possibility to determine total cadmium, lead and copper concentration in whole blood without special sample pretreatment. The application of ''Ultra-Trace Electrode'' for blood analysis is possible only after preliminary pretreatment of blood by chemical digestion or electrochemical sample preparation. [References: 15]
机译：血液中有毒金属离子测定的问题是电极表面上有机化合物的吸附以及金属离子和血液有机成分之间形成络合物。这就是为什么通常使用初步酸消解或其他样品预处理的原因。已使用两种电极：由浸渍石墨（I）制成的“超痕量电极”和厚膜石墨一次性电极（II）。用不同的样品制备方法对全血进行分析表明，化学消化不是分析所必需的。电化学两阶段样品制备为使用上述电极分析全血提供了可能性。厚膜一次性电极对血液中有机成分的干扰较不敏感。这些电极使无需特殊样品预处理即可测定全血中总镉，铅和铜的浓度。只有在通过化学消化或电化学样品制备对血液进行初步预处理之后，才能将“超痕量电极”用于血液分析。 [参考：15]

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