Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Faculty Publications Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource Nagpal, Simran; P, Chaithra K.; S, Sreelekha; P, Vinod T. Title A name given to the resource Colorimetric Indicator Solution from Sappan Heartwood (Caesalpinia sappan L.) Extract for Milk Quality Monitoring Date A point or period of time associated with an event in the lifecycle of the resource 01-01-2025 Source A related resource from which the described resource is derived Food Analytical Methods;Volume;18;Issue;12;pp.2774-2789 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1007/s12161-025-02908-6" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/s12161-025-02908-6</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105018347520?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105018347520?origin=resultslist</a> Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Nagpal S., Department of Chemistry, Christ University, Hosur Road, Bengaluru, 560029, India; P C.K., Department of Chemistry, Christ University, Hosur Road, Bengaluru, 560029, India; S S., Tagore Memorial Higher Secondary School, Kerala, Vellora, Kannur, 670306, India; P V.T., Department of Chemistry, Christ University, Hosur Road, Bengaluru, 560029, India, Centre for Renewable Energy and Environmental Sustainability, Christ University, Bengaluru, 560029, India Description An account of the resource This study utilizes Caesalpinia sappan L., traditionally valued for its culinary and medicinal uses, to develop a colorimetric indicator solution for monitoring milk spoilage. The indicator provides real-time updates on milk freshness through color changes induced by biochemical alterations during spoilage. The color of the indicator solution transitions distinctly from orange-red to orange to yellow as the pH shifts from 7.00 to 5.50 to 3.50, correlating with progressive stages of spoilage. An orange-red color was observed for the fresh stage, orange color for about to be spoilt, and yellow color for the spoilt stage of milk samples. The colorimetric changes are attributed to the presence of Brazelin in Caesalpinia sappan L. Digital images of the indicator solution treated with milk samples were analyzed using RGB (red, green, and blue) indices, with the green chromatic shift serving as a reliable parameter for quantifying color changes, providing reliable assessment of milk spoilage. Findings of this study highlight a simple, accessible, and accurate method for milk quality monitoring that requires no specialized equipment or trained personnel, making it suitable for food safety practices in resource-limited settings. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025. Subject The topic of the resource Caesalpinia sappanL; Colorimetric indicator; Food safety; Milk spoilage; RGB analysis Publisher An entity responsible for making the resource available Springer Relation A related resource ISSN: 19369751; Language A language of the resource English Type The nature or genre of the resource Article Rights Information about rights held in and over the resource Restricted Access; Hardcopy may be available in the library Format The file format, physical medium, or dimensions of the resource online