Kertas Label Kolorimetrik Dengan Ekstrak Ubi Ungu Sebagai Indikator Pada Kemasan Pintar Untuk Mendeteksi Kesegaran Susu

Cuk Imawan, Rizka Fitriana, Arie Listyarini, Wafa Sholihah, Wiwik Pudjiastuti

Abstract


Produk susu sangat rentan terhadap penurunan kualitas yang dapat disebabkan karena faktor penyimpanan, padahal kualitas susu sangat penting untuk diperhatikan sebelum dikonsumsi. Pada penelitian ini dikembangkan label kolorimetrik sebagai indikator pada kemasan pintar yang dapat mendeteksi kualitas susu secara sederhana dan murah. Label kolorimetrik dibuat dari kertas selulosa dan ekstrak Ipomoea batatas sebagai zat warna alami untuk mendeteksi kualitas susu. Label dibuat dengan variasi pH ekstrak pH 2, pH 7, dan pH 11. Pengujian label dilakukan untuk kondisi penyimpanan suhu pada temperatur 4 oC, 23 oC dan 40 oC selama waktu 48 jam. Perubahan warna label difoto digital dan kemudian dihitung dengan analisis warna RGB. Hasil eksperimen menunjukkan label kolorimetrik dengan ekstrak zat warna pH 2 mengalami perubahan warna dari merah muda ke merah keunguan, pH 7 berubah warna dari ungu ke ungu terang agak kemerahan, dan pH 11 berubah warna dari biru keabuan menjadi terang kekuningan setelah 48 jam. Dengan demikian label kolorimetrik dengan ekstrak zat warna pH 11 paling baik untuk mendeteksi kesegaran susu, karena mengalami perubahan warna yang paling kontras. Penelitian ini menunjukkan bahwa label kolorimerik berbahan dasar ekstrak Ipomoea batatas baik untuk digunakan sebagai indikator pada kemasan pintar untuk mendeteksi kesegaran susu secara visual dan sederhana.


Keywords


label kolorimetrik; kemasan pintar; kesegaran susu

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References


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DOI: http://dx.doi.org/10.24817/jkk.v40i1.3525

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