Portable infrared lightbox for improving the detection limits of paper-based phosphate devices
Portable infrared lightbox for improving the detection limits of paper-based phosphate devices
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DOI：
10.1016/j.measurement.2020.108607
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发表时间：
2021-02-11
期刊：
影响因子：
5.6
通讯作者：
Faghri, Mohammad
中科院分区：
文献类型：
--
作者：
Heidari-Bafroui, Hojat;Ribeiro, Brenno;Faghri, Mohammad
在此，我们报告了一种便携式、iPhone 控制且廉价的红外灯箱的开发，用于提高纸基磷酸盐设备的检测限。商业设备利用钼蓝方案进行磷酸盐检测。尽管这些设备用户友好且保质期长，但其标准操作模式的灵敏度较低，因为它通过与比色图表进行比较来提供半定量结果。为了改善结果，我们构建了一个紧凑的红外灯箱，可以与配备开发的比色分析仪的智能手机进行无线通信。该系统测量光谱红外区域中钼蓝反应的辐射吸光度。通过使用红外灯箱，两种流行的纸质商业设备的检测限（Quantofix 设备）提高了 4 倍，Indigo 设备提高了 6 倍（重复性小于或等于 1.2% RSD）。
Herein, we report the development of a portable, iPhone controlled, and inexpensive infrared lightbox for improving the detection limits of paper-based phosphate devices. Commercial devices utilize the molybdenum blue protocol for phosphate detection. Although these devices are user-friendly and have a long shelf life, their standard mode of operation suffers from low sensitivity since it gives semi-quantitative results by comparing to a color chart. To improve the results, we constructed a compact infrared lightbox that communicates wirelessly with a smartphone equipped with a developed colorimetric analyzer. This system measures the absorbance of radiation for the molybdenum blue reaction in the infrared region of the spectrum. By using the infrared lightbox, the detection limits for two popular paper-based commercial devices were improved by a factor of 4 for the Quantofix devices and a factor of 6 for the Indigo units with repeatability of less than or equal to 1.2% RSD.