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首页> 外文期刊>Journal of AOAC International >Utilization of Picolinaldehyde-4-phenyl-3-thiosemicarbazone in Sodium Dodecylsulfate Micelles for the Spectrophotometric Determination of Iron, Vanadium, and Cobalt Following Partial Least-Squares Regression Analysis
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Utilization of Picolinaldehyde-4-phenyl-3-thiosemicarbazone in Sodium Dodecylsulfate Micelles for the Spectrophotometric Determination of Iron, Vanadium, and Cobalt Following Partial Least-Squares Regression Analysis

机译：偏最小二乘回归分析光度法测定十二烷基硫酸钠胶束中的吡啶啉-4-苯基-3-硫代半碳霉酮用于分光光度法测定铁，钒和钴

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摘要

Partial least-squares regression was applied for the simultaneous determination of iron, vanadium, and cobalt after complexation with picolinaldehyde-4-phenyl-3-thiosemicarbazone (PAPT) in the presence of anionic sodium dodecylsulfate (SDS) micelles. These 3 complexed metal ions exhibited overlapping spectra in the 390-510 nm region with a maximum absorbance at 415 nm at pH 3.0 and enhanced absorbance in the presence of SDS. The data for the simultaneous determination of these metal ions were analyzed using a simple partial least-squares (SIMPLS) algorithm. Formation constants (log K-f) were found to be 4.65, 3.29, and 4.85 for PAPT complexes of Fe, V, and Co, respectively, and the detection limits for Fe, V, and Co were 0.013, 0.002, and 0.010 mu g/mL, respectively. Common anions and cations did not interfere with the proposed method. The method was validated by calculating root mean square error of cross-validation, root mean square error of calibration, and root mean square error of prediction and was applied to determine these 3 metal ions in real crude oil samples.
机译：在阴离子十二烷基硫酸钠（SDS）胶束存在下，与吡啶甲醛-4-苯基-3-硫代半碳酰胺（PAPT）络合后，应用偏最小二乘回归法同时测定铁，钒和钴。这三种络合的金属离子在390-510 nm区域表现出重叠的光谱，在pH 3.0下在415 nm处具有最大吸收，在SDS存在下吸收增强。使用简单的偏最小二乘（SIMPLS）算法分析了同时测定这些金属离子的数据。 Fe，V和Co的PAPT配合物的形成常数（log Kf）分别为4.65、3.29和4.85，Fe，V和Co的检出限为0.013、0.002和0.010μg / mL，分别。常见的阴离子和阳离子不会干扰该方法。该方法通过计算交叉验证的均方根误差，校准的均方根误差和预测的均方根误差进行验证，并用于确定真实原油样品中的这三种金属离子。

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