Preparation and characterization of a novel Co(II) optode based on polymer inclusion membrane

Analytical Chemistry Research Pub Date : 2017-06-01 DOI:10.1016/j.ancr.2017.02.001

Faiz Bukhari Mohd Suah

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引用次数: 22

Abstract

A greener analytical procedure based on automated flow through system with an optical sensor is proposed for determination of Co(II). The flow through system consisted of polymer inclusion membrane (PIM) containing potassium thiocyanate (KSCN) that was placed between the measuring cell and fixed with optical sensor probe as an optical sensor for monitoring of Co(II) at 625 nm. In the presence of Co(II) ions, the colourless membrane changes to blue. The sensing membrane was prepared by incorporating SCN into a non plasticized PIM. The prepared PIM were found to be homogenous, transparent and mechanically stable. The optode shows reversible optical response in the range of 1.00 × 10⁻⁶ – 1.00 × 10⁻³ mol L⁻¹ with detection limit of 6.10 × 10⁻⁷ mol L⁻¹. The optode can be regenerated by using 0.1 mol L⁻¹ of ethylenediaminetetraacetic acid (EDTA). The main parameters of the computer controlled flow system incorporating the flow-through optode, a multi-port selection valve and peristaltic pump were optimized too. The calculated Relative Standard Deviation (R.S.D) of the repeatability and reproducibility of the method are 0.76% and 4.73%, respectively. This green system has been applied to the determination of Co(II) in wastewater samples with reduced reagents and samples consumption and minimum waste generation.

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基于聚合物包合膜的新型Co(II)光电器件的制备与表征

提出了一种基于光学传感器的自动流动系统的绿色分析方法，用于测定Co(II)。流动系统由含有硫氰酸钾(KSCN)的聚合物包合膜(PIM)组成，该包合膜放置在测量池之间，并固定有光学传感器探头作为光学传感器，用于监测625 nm处的Co(II)。在Co(II)离子存在下，无色膜变成蓝色。将SCN掺入未增塑的PIM中制备传感膜。制备的PIM均匀、透明、机械稳定。该光电器件在1.00 × 10−6 ~ 1.00 × 10−3 mol L−1范围内表现出可逆的光响应，检出限为6.10 × 10−7 mol L−1。用0.1 mol L−1的乙二胺四乙酸(EDTA)再生光刻片。对由通流二极管、多通道选择阀和蠕动泵组成的微机控制流量系统的主要参数进行了优化。方法重复性和重现性的相对标准偏差(rsd)分别为0.76%和4.73%。该绿色系统已应用于废水样品中Co(II)的测定，试剂和样品消耗减少，废物产生最少。

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Analytical Chemistry Research

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