Chandrajith, Vidana Gayan Gamage
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Development of an On-Site Protocol to Identify the Adulterations in Palmyrah Jaggery through Comparative Evaluation of Fresh Market Samples and Control Sample Thangavel, Kirushanthi; Thavaputhalvan, Thavapiraja; Chandrajith, Vidana Gayan Gamage; Sivaji, Maathumai; Srivijeindran, Srithayalan
International Journal on Food, Agriculture and Natural Resources Vol 6, No 2 (2025): IJ-FANRES
Publisher : Food, Agriculture and Natural Resources - NETWORKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46676/ij-fanres.v6i2.495

Abstract

Palmyrah jaggery, a traditional sweetener valued for its nutritional properties, is vulnerable to adulteration, compromising its authenticity and safety. This study aimed to develop a simple, cost-effective on-site protocol by examining the relationships between sensory attributes, physico-chemical properties, and adulterant test results in market samples compared to a control (QC) sample. Twenty freshly prepared jaggery samples from local producers and a laboratory-prepared QC sample were analyzed. Sensory evaluation assessed the attributes of jaggery, such as taste and aroma, by the Difference from Control (DFC) method. Simultaneously, physico-chemical parameters, including conductivity, total ash content, moisture content, Brix, pH, and color, were measured using standard methods. Adulterant-specific tests, such as sedimentation, iodine, and saccharin detection, were used to identify impurities like rice bran, starch, and CaCO3. The sensory evaluation revealed significant differences (p < 0.05) in taste and aroma in 12 samples compared to QC, and 9 tested positive for adulterants like starch and CaCO3. Conductivity and total ash content proved to be reliable indicators of adulteration, as adulterated samples displayed lower values, reflecting a reduction in mineral content compared to the QC. Moisture content, Brix, pH, and color parameters were less reliable indicators of adulteration due to variations in manufacturing practices, such as processing temperature and filtration methods. Additionally, all market samples exceeded the SLS 521:1981 limit for insoluble matter, indicating inadequate processing. This study demonstrates the effectiveness of a stepwise detection method combining sensory, physico-chemical, and adulterant-specific tests. The findings provide a foundation for ensuring the authenticity of palmyrah jaggery, promoting sustainable production, consumer safety, and market confidence.