A simple method for colourimetric determination of silver using a home-made double beam photometer

IF 0.8 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY South African Journal of Chemistry-Suid-Afrikaanse Tydskrif Vir Chemie Pub Date : 2023-01-01 DOI:10.17159/0379-4350/2023/v77a03

M. Saadati

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Abstract

The present study proposes a simple and inexpensive photometric method for the selective determination of Ag(I). This method employed a home-made double beam photometer for the determination of silver ions based on an optode sensor prepared by immobilization of 5-(P-Dimethylaminobenzylidene)-rhodanine (PDR) on triacetyl cellulose (TAC) membrane. Two green LEDs as sources of light and light-dependent resistors (LDRs) as detectors were used in the proposed device. The LEDs are turned on by a programmable microcontroller that receives signals from light passed through the sensor, and the absorbance is calculated and displayed on a Liquid-crystal display (LCD) screen. With the optimum conditions, the calibration plot was linear in the concentration range of 0.5-6 μg mL-1. For five replicate determinations of 2 μg mL-1 Ag(I) and the related detection limits, the relative standard deviations were 2.29% and 0.25 μg mL-1, respectively. The method was applied successfully for determining silver in a silver sulphadiazine cream, a radiology effluent, and radiology film samples and the results obtained were in good agreement with those of the standard flame atomic absorption spectroscopy (FAAS) method.

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用自制双光束光度计测定银的简单比色法

本研究提出了一种简单、廉价的选择性测定银(I)的光度法。本方法采用自制的双光束光度计，将5-(p -二甲氨基对苯二胺)-罗丹宁(PDR)固定在三乙酰纤维素(TAC)膜上制成光电传感器，用于银离子的测定。两个绿色led作为光源，光相关电阻(ldr)作为检测器被用于所提出的器件。led由一个可编程微控制器打开，该控制器接收通过传感器的光的信号，并计算吸光度并显示在液晶显示屏上。在最佳条件下，在0.5 ~ 6 μ mL-1的浓度范围内，标定曲线呈线性关系。对于2 μg mL-1 Ag(I)的5次重复测定及其检出限，相对标准偏差分别为2.29%和0.25 μg mL-1。该方法成功地应用于磺胺嘧啶银乳膏、放射学出水和放射学膜样品中的银的测定，所得结果与标准火焰原子吸收光谱法(FAAS)的测定结果吻合较好。

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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来源期刊

South African Journal of Chemistry-Suid-Afrikaanse Tydskrif Vir Chemie 化学-化学综合

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Original work in all branches of chemistry is published in the South African Journal of Chemistry. Contributions in English may take the form of papers, short communications, or critical reviews.