Abstract
For most of the fast screening test papers for detecting Hg2+, the obtained results are qualitative. This study developed an operation for the μPAD and combined it with the chemical colorimetric method. Silver nanoparticle (AgNP) colloids were adopted as the reactive color reagent to combine and react with the Hg standards on the paper-based chip. Then, the RGB values for the color change were used to establish the standard curve (R2 > 0.99). Subsequently, this detection system was employed for the detection tests of actual samples, and the detected RGB values of the samples were substituted back to the formula to calculate the Hg2+ contents in the food. In this study, the Hg2+ content and recovery rate in commercially available packaged water and edible salts were measured. The research results indicate that a swift, economical, and simple detection method for Hg2+ content in food has been successfully developed.
Highlights
The basic requirement and prerequisite for maintaining physical and mental health is to consume safe and nutritious food [1]
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It was determined that the resolution gap value close to the plateau is not necessarily the best
Summary
The basic requirement and prerequisite for maintaining physical and mental health is to consume safe and nutritious food [1]. Because minute amounts of Hg can cause damage to the nervous, urinary, reproductive, immune, cardiovascular, and endocrine systems, mercury pollution of natural water bodies exposes human health and ecosystems to severe risks [2,3]. Techniques for highly sensitive and selective detection of Hg2+ include cold vapor atomic absorption spectrometry (CVAAS), cold vapor atomic fluorescence spectrometry (CVAFS), and inductively coupled plasma mass spectrometry (ICP-MS). These high-performance techniques often require expensive equipment and technical expertise for sample preparations [7,8,9,10]
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