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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Evaluation of Perrhenate Spectrophotometric Methods in Bicarbonate and Nitrate Media
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Evaluation of Perrhenate Spectrophotometric Methods in Bicarbonate and Nitrate Media

机译：重碳酸盐和硝酸盐介质中高Per酸盐分光光度法的评价

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摘要

2-pyridyl thiourea and methyl-2-pyridyl ketoxime based perrhenate, Re(VII), UV-vis spectrophotometric methods were evaluated in nitrate and bicarbonate solutions ranging from 0.001 M to 0.5 M. Standard curves at [Re]=2.5-50 mg L-1 for the Re(IV)-thiourea and the Re ketoxime complexes were constructed at 405 nm and 490 nm, respectively. Detection of limits for N-(2-pyridyl) thiourea and methyl-2-pyridyl ketoxime methods in ultrapure water are 3.06 mg/L and 4.03 mg/L, respectively. Influences of NaHCO3 and NaNO3 concentration on absorbance spectra, absorptivity, and linearity were documented. For both methods, samples in ultrapure water and NaHCO3 have an R-2 value > 0.99, indicating strong linear relationships. Statistical analysis supports that NaHCO3 does not affect linearity between standards for either method. NaNO3 causes major interference with the ketoxime method above 0.001 M NaNO3. Data provides information for practical use of Re spectrophotometric methods in environmental media that is high in bicarbonate and nitrate. (C) 2015 Elsevier B.V. All rights reserved.
机译：在0.001 M至0.5 M的硝酸盐和碳酸氢盐溶液中评估了2-吡啶基硫脲和甲基-2-吡啶基酮肟的高hen酸盐，Re（VII），紫外可见分光光度法。[Re] = 2.5-50 mg的标准曲线Re（IV）-硫脲和Re ketoxime复合物的L-1分别在405 nm和490 nm处构建。在超纯水中，N-（2-吡啶基）硫脲和甲基-2-吡啶基酮肟的检测限分别为3.06 mg / L和4.03 mg / L。记录了NaHCO3和NaNO3浓度对吸收光谱，吸收率和线性的影响。对于这两种方法，超纯水和NaHCO3中的样品的R-2值均大于0.99，表明存在强线性关系。统计分析支持NaHCO3不会影响两种方法中标准品之间的线性。在0.001 M NaNO3以上时，NaNO3对酮肟法产生重大干扰。数据为Re分光光度法在碳酸氢盐和硝酸盐含量高的环境介质中的实际使用提供了信息。 （C）2015 Elsevier B.V.保留所有权利。

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