Selective and Sensitive Simultaneous Determination of Mercury and Cadmium based on the Aggregation of PHCA Modified- AuNPs in West Azerbaijan Regional Waters

Sakineh Alizadeh, T. Madrakian, M. Bahram
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引用次数: 4

Abstract

The present study aims to present a new convenient sensor for heavy metals, based on aggregation of citrate-capped- N, N' biphenyl hydrazine 1, 2 dicarbothioamide (PHCA) - modified- (AuNPs). This paper reports a procedure for sensitive and selective spectrophotometric methods for simultaneous determination of mercury (Hg22+) and cadmium (Cd2+). For this aim multivariate data including kinetic spectra of AuNPs were collected during aggregation process. The characterization of AuNPs was performed by transmission electron microscopy (TEM) and Infra-Red (IR) spectroscopy. Partial least square (PLS) regression as an efficient multivariate calibration method was employed to make a connection between the surface plasmon resonance (SPR) spectra of the generated AuNPs. The number of PLS latent variables was optimized by leave-one-out cross-validation utilizing prediction residual error sum of square (PRESS). The linear range was in the range of 3.33 × 10-5 - 3.33 × 10-6 mol L-1 and 2.0 × 10-5 - 1.0 × 10-6 mol L-1, the detection limit was 1.21×10-7 and 0.5 ×10-7 mol L-1 (n=5) for Hg22+and Cd2+, respectively. This method used successfully for simultaneous determination of Hg22+ and Cd2+ in West Azerbaijan regional waters namely Zarineh / Simineh rivers and Urmia Lake.
基于PHCA修饰- AuNPs聚集的西阿塞拜疆地区水域中汞和镉的选择性灵敏同时测定
本研究旨在提出一种基于柠檬酸盐包封的- N, N'联苯肼1,2二碳硫酰胺(PHCA) -修饰- (AuNPs)聚集的新型重金属传感器。本文报道了同时测定汞(Hg22+)和镉(Cd2+)的灵敏选择性分光光度法。为此,我们收集了AuNPs在聚合过程中的多变量数据,包括动力学谱。通过透射电镜(TEM)和红外光谱(IR)对AuNPs进行了表征。采用偏最小二乘(PLS)回归作为一种有效的多变量校准方法,建立了生成的aunp表面等离子体共振(SPR)光谱之间的联系。利用预测残差平方和(PRESS)进行留一交叉验证,优化PLS潜在变量的数量。在3.33 × 10-5 ~ 3.33 × 10-6 mol -1和2.0 × 10-5 ~ 1.0 × 10-6 mol -1的线性范围内,Hg22+和Cd2+的检出限分别为1.21×10-7和0.5 ×10-7 mol -1 (n=5)。该方法成功地同时测定了西阿塞拜疆地区水域,即Zarineh / Simineh河和Urmia湖中的Hg22+和Cd2+。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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