کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1246546 | 969758 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Development of a novel colorimetric indicator label for monitoring freshness of intermediate-moisture dessert spoilage Development of a novel colorimetric indicator label for monitoring freshness of intermediate-moisture dessert spoilage](/preview/png/1246546.png)
A colorimetric mixed pH dye-based indicator with potential for the development of intelligent packaging, as a “chemical barcode” for real-time monitoring of intermediate-moisture dessert spoilage, is described. This on-package indicator contains mixed pH-sensitive dyes, bromothymol blue and methyl red, that respond through visible color change to carbon dioxide (CO2) as a spoilage metabolite. Both indicator solution and indicator label characteristics were studied, as well as their response to CO2. A kinetic approach was used to correlate the response of the indicator label to the changes in intermediate-moisture dessert spoilage. Color changes, in terms of total color difference of a mixed pH dye-based indicator, correlated well with CO2 levels of intermediate-moisture dessert. Trials on golden drop have verified that the indicator response correlates with microbial growth patterns in dessert samples, thus enabling the real-time monitoring of spoilage either at various constant temperatures or with temperature fluctuation.
Journal: Talanta - Volume 81, Issue 3, 15 May 2010, Pages 1126–1132