Study of pH Changes of Rice and Suitable Condition of Mixed Indicator Solution for Developing a Simple Rice Age Test Kit

Simple item page
dc.contributor.authorKittisak Wasantiwong
dc.contributor.authorRungtiwa Wongsagonsup
dc.contributor.authorDusit Angthararuk
dc.contributor.authorJeerun Kingkaew
dc.date.accessioned2025-02-06T05:22:44Z
dc.date.available2025-02-06T05:22:44Z
dc.date.issued2023
dc.description.abstractRice grains encounter the changes of physicochemical properties along the storage periods, thus affecting the cooking and eating properties. This research aims to study the pH changes of stored rice cultivars during different storage times and to find the suitable condition of mixed indicator solution between Methyl red and Bromothymol blue for developing a simple test kit for age estimation of stored rice. The rice cultivars used were RD 6, Khao Dawk Mali 105, and Phitsanulok 2, which were stored for 0–12 months at room temperature. The results showed that for rice with increasing storage time, pH value of rice decreased. The pH of RD 6, Khao Dawk Mali 105, and Phitsanulok 2 rice cultivars decreased from 6.82–6.45, from 7.09 to 6.45 and from 7.03–6.49, respectively. The color of the mixed indicator solution changed according to the pH value of phosphate buffer (pH 5.8–7.2). The suitable condition giving the most obvious color differences in pH 5.8-7.2 of mixed indicator solution between Methyl red and Bromothymol blue was at ratio of 60 : 40 and volume of 0.30 ml. When the stored rice samples of varying ages were tested with the optimum mixed indicator solution, the solution color changed from green to yellow and orange with the increasing storage times of rice. This can be used for developing a simple test kit for age estimation of stored rice and would also solve the problem of adulteration of fresh and aged rice.
dc.identifier.urihttps://repository.dusit.ac.th//handle/123456789/2829
dc.publisherThe Journal of KMUTNB
dc.subjectFresh Rice
dc.subjectAged Rice
dc.subjectStorage Age of Rice
dc.subjectpH Value
dc.subjectMixed Indicator Solution
dc.titleStudy of pH Changes of Rice and Suitable Condition of Mixed Indicator Solution for Developing a Simple Rice Age Test Kit
mods.location.urlhttps://ojs.kmutnb.ac.th/index.php/kjournal/article/view/5114
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
SCA_ART_2566_001.pdf
Size:
1.12 MB
Format:
Adobe Portable Document Format
Download
Thumbnail Image
Name:
SCA_ART_2566_001.pdf
Size:
1.12 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
Default Image
Name:
license.txt
Size:
371 B
Format:
Item-specific license agreed to upon submission
Description:
Download
Collections
SCA-Article