Portable low-cost spectrophotometer for trace detection of cadmium ions in cocoa crops

2022 IEEE International Conference on Engineering Veracruz (ICEV) Pub Date : 2022-10-24 DOI:10.1109/ICEV56253.2022.9959639

Rafael A. Núñez R., Carlos I. Nova P., Cristhiam J. Gutierrez L., Daniel A. Velasco C., Jhonny M. Ceron Cifuentes, Daniel A. Amaya, M. Y. Combariza, C. B. Tirado

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Abstract

This work presents the design of a portable and compact low-cost electronic prototype for detecting Cd2+ in matrices associated with cocoa crops. It is based on a C12882AM solid-state detector and an 8-bit MCU. Acquired data can be visualized through a computer interface, allowing users to collect and visualize data on the fly or to set up a continuous analysis experiment. It can analyze absorbance spectra in the range of 450 to 750 nm. The RhB1 chemosensor was used to detect Cd2+ concentrations from the absorbance peaks. Different metrics were determined in terms of the repeatability test, coefficient of determination R2 , limit of detection (LoD), limit of quantification (LoQ), precision of Y/X response factors, and relative standard deviation (RSD). The results show the adequate performance of the prototype, since it can analyze Cd2+ samples with a performance comparable even to that of commercial laboratory equipment in the range of 0.1 ppm to 0.7 ppm Cd2+.

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便携式低成本分光光度计测定可可作物中痕量镉离子

这项工作提出了一种便携式和紧凑的低成本电子原型的设计，用于检测与可可作物相关的基质中的Cd2+。它基于C12882AM固态探测器和8位MCU。获取的数据可以通过计算机界面可视化，允许用户在飞行中收集和可视化数据或设置连续分析实验。它可以分析450 ~ 750nm范围内的吸光度光谱。利用RhB1化学传感器从吸光度峰检测Cd2+浓度。通过重复性试验、决定系数R2、检出限(LoD)、定量限(LoQ)、Y/X响应因子精密度、相对标准偏差(RSD)等指标确定不同指标。结果表明原型机具有足够的性能，因为它可以在0.1 ppm至0.7 ppm的Cd2+范围内分析Cd2+样品，其性能甚至可以与商业实验室设备相媲美。

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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2022 IEEE International Conference on Engineering Veracruz (ICEV)

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