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首页> 外文期刊>Analytical Letters >Simultaneous Determination of Cadmium, Copper,Lead and Zinc in Amino Acid Parenteral Nutrition Solutions by Anodic Stripping Voltammetry and Sample Digestion by UV Irradiation
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Simultaneous Determination of Cadmium, Copper,Lead and Zinc in Amino Acid Parenteral Nutrition Solutions by Anodic Stripping Voltammetry and Sample Digestion by UV Irradiation

机译：阳极溶出伏安法和紫外光消解样品同时测定氨基酸肠胃外营养液中的镉，铜，铅和锌

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摘要

Irradiation with ultraviolet(UV)energy was investigated to assay cadmium,copper,lead,and zinc by anodic stripping voltammetry(ASV)in amino acid parenteral nutrition(PN)solutions.Sample digestion by UV irradiation showed the best performances to liberate the metals from the samples(metal recoveries between 90% and 102%)in com-parison with classical oxidative wet digestion methods.The best UV digestion condition was obtained with 1:10 diluted PN samples irradiated during 10 h at 90 +- 3deg C with the addition of one aliquot of 50 mu L concentrated H_2SO_4 and repeated additions of 50 mu L 30%(v/v)H_2O_2 at each 60min irradiation interval.By using the UV digestion procedure cadmium,copper,lead,and zinc were simultaneously assayed in commercial amino acid PN solutions by ASV.The metal concentrations ranged between 1.3 to 4.4 for cadmium,2.9 to 40.8 for copper,4.4 to 16.8 for lead,and 1.4 to 208.5 for zinc.The ASV method correlated well with atomic absorption spectrometry measurements to assay the investigated analytes in amino acid PN samples after the UV digestion.
机译：研究了用紫外线（UV）能量进行阳极肠溶伏安法（ASV）在氨基酸肠胃外营养（PN）溶液中进行阳极溶出伏安法（ASV）的测定。镉，铜，铅和锌的含量最高。与经典的氧化湿消解法比较，样品（金属回收率在90％到102％之间）。最佳的UV消解条件是在90±3℃下10h辐照1:10稀释的PN样品并添加在60分钟的辐照间隔中每50μL浓H_2SO_4的等分试样并重复添加50μL30％（v / v）H_2O_2。通过紫外消解方法，同时在商品氨基中测定镉，铜，铅和锌ASV酸性PN溶液。镉的金属浓度范围为1.3至4.4，铜的范围为2.9至40.8，铅的范围为4.4至16.8，锌的范围为1.4至208.5.ASV方法与原子吸收光谱法的测量结果具有很好的相关性说在紫外线消化后氨基酸PN样品中被调查的分析物。

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