Digital colorimetric sensor for assessment of iodate in food-grade salt based on paper-based analytical device

被引：8

作者：

Galiga, Henley F. ^{[1
,3
,4
]}

Sevilla, Fortunato B., III ^{[1
,2
,4
]}

机构：

[1] Univ St Tomas, Grad Sch, Manila 1015, Philippines

[2] Univ St Tomas, Res Ctr Nat & Appl Sci, Manila 1015, Philippines

[3] Romblon State Univ, Coll Arts & Sci, Romblon 5505, Philippines

[4] Univ Santo Tomas, Grad Sch, Manila 1015, Philippines

来源：

FOOD CHEMISTRY | 2023年 / 414卷

关键词：

Digital colorimetric sensor; Iodate in food grade salt; Paper-based analytical device; Smartphone detection; SPECTROPHOTOMETRIC DETERMINATION; SAMPLES; IODIDE;

D O I：

10.1016/j.foodchem.2023.135741

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A digital colorimetric sensor was developed for the on-site measurement of iodate in food-grade salt. It involved a paper-based analytical device (PAD) containing an immobilized iodide/starch reagent and a smartphone as the detection system. Iodate ions produce a blue-black coloration on the PAD, the smartphone captures a digital image of the PAD, and an installed mobile app performs an analysis to generate color values related to the intensity of the color in the PAD. Parameters in the image acquisition and PAD preparation were optimized, and a matrix-matched calibration plot was employed for quantification. The plot exhibited a linear response in the concentration range of 10 to 100 mg iodate kg(-1) of salt, and a detection limit of 2.20 mg kg(-1) was determined. The present method was applied to analyze real samples, and the results agreed well with those obtained using the reference method at the 95% confidence level.

引用

页数：7

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