State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Jun 5;216:283-289. doi: 10.1016/j.saa.2019.03.039. Epub 2019 Mar 18.
A new strategy for the determination of bisphenol A (BPA) and diphenyl carbonate (DPC) in polycarbonate plastics has been proposed, combing excitation-emission matrix fluorescence and second-order chemometrics methods. The studied compounds are two of the most frequently used chemical raw materials and intermediates, which is mainly used for bio-chemical products. The method is fast and sensitive as it can avoid tedious pretreatment steps and large amounts of organic solvents consumption. Chemometrics allowed accurate and precise quantification of two target analytes even in the presence of severe spectral overlap, unknown and background interferences, which benefit from "second-order advantages" provided by chemometrics multivariate calibration. Reasonable quantification results were obtained in real plastics samples, with limits of detection for two analytes were 0.04 and 1.18 × 10 ng mL and limits of quantitation were 0.11 and 3.58 × 10 ng mL. In addition, the average recoveries for BPA and DPC were 99.35% and 83.50% with relative standard deviation <2.30%. It was proved that the proposed method can be a useful and sensitive tool to the determination of BPA and DPC in different polycarbonate plastics with a simple sample pretreatment at low cost.
一种新的策略，用于结合激发-发射矩阵荧光和二阶化学计量学方法来测定聚碳酸酯塑料中的双酚 A（BPA）和碳酸二苯酯（DPC）。研究的化合物是两种最常用的化学原料和中间体，主要用于生化产品。该方法快速灵敏，可避免繁琐的预处理步骤和大量有机溶剂的消耗。化学计量学允许对两个目标分析物进行准确和精确的定量，即使在严重的光谱重叠、未知和背景干扰存在的情况下，这得益于化学计量学多元校准提供的“二阶优势”。在实际塑料样品中得到了合理的定量结果，两种分析物的检出限分别为 0.04 和 1.18×10ngmL，定量限分别为 0.11 和 3.58×10ngmL。此外，BPA 和 DPC 的平均回收率分别为 99.35%和 83.50%，相对标准偏差<2.30%。结果证明，该方法可以作为一种有用的、灵敏的工具，用于不同聚碳酸酯塑料中 BPA 和 DPC 的测定，具有低成本、简单的样品预处理的特点。
