Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7586015 | Food Chemistry | 2018 | 8 Pages |
Abstract
A biodegradable colorimetric film was fabricated on the lid of portable tube for in-tube formaldehyde detection. Based on the entrapment of colorimetric reagents within a thin film of tapioca starch, the yellow reaction product was observed with formaldehyde. Intensity of the blue channel from the digital image of yellow product showed a linear relationship in the range of 0-25â¯mgâ¯Lâ1 with low detection limit of 0.7â¯Â±â¯0.1â¯mgâ¯Lâ1. Inter-day precision of 0.61-3.10%RSD were obtained with less than 4.2% relative error from control samples. The developed method was applied for various food samples in Phuket and formaldehyde concentration range was non-detectable to 1.413â¯mgâ¯kgâ1. The quantified concentrations of formaldehyde in fish and squid samples provided relative errors of â7.7% and +10.8% compared to spectrophotometry. This low cost sensor (â¼0.04â¯USD/test) with digital image colorimetry was thus an effective alternative for formaldehyde detection in food sample.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Worawit Wongniramaikul, Wadcharawadee Limsakul, Aree Choodum,