PENGARUH PENAMBAHAN RICE BRAN WAX PADA COATING FILM BERBASIS KITOSAN JAMUR TIRAM TERHADAP PENYUSUTAN BERAT DAN pH BUAH TOMAT

Nufus Kanani, Muhammad Triyogo Adiwibowo, Indar Kustiningsih, Heri Heriyanto, Rusdi Rusdi, Harly Demustila, Wardalia Wardalia, Endarto Yudo Wardhono, Widya Ernayati Kosimaningrum, Meri Yulvianti, Muhammad Gofar, Ila Maghfirotul Fahira

Abstract


Tomat (Solanum lycopersium L) merupakan buah yang memiliki kandungan air yang tinggi, sehingga mudah mengalami kerusakan dan mengurangi masa simpan tomat. Coating film pada tomat dapat berfungsi untuk melindungi tomat dari kerusakan fisik dan kimia. Kitosan jamur tiram sebagai bahan dasar pembentukan coating film memiliki kelebihan yaitu bersifat kuat dan fleksibel, namun kitosan memiliki kelemahan, yaitu bersifat hidrofilik sehingga perlu penambahan bahan lain untuk memperbaiki karakteristiknya, yaitu dengan penambahan rice bran wax. Penelitian ini dilakukan melalui tahapan pelarutan kitosan dalam asam asetat, penambahan rice brand wax 20-50% (w/v), pembentukan coating film menggunakan metode grafting dengan bantuan gelombang ultrasonik pada temperatur 90°C selama 10-60 menit, dan pengaplikasian coating film pada tomat. Dari penelitian yang dilakukan diperoleh hasil tomat tanpa coating yang dianalisis selama 7 hari menunjukkan tanda pembusukan, sedangkan tomat dengan coating film tetap segar. Penambahan rice brand wax berpengaruh pada penurunan susut bobot tomat. Pada konsentrasi rice bran wax 1-5% menunjukkan bahwa coating film mampu mengurangi penyusutan berat tomat dibandingkan tanpa coating. Penurunan susut bobot tertinggi berturut-turut sebesar 7,88%; 7,71%; 5,8%; 4,57% dan 4,33%. Penambahan rice brand wax juga berpengaruh pada banyaknya gas etilen yang dihasilkan. Kadar gas etilen yang dihasilkan pada hari ke 7 dengan dan tanpa adanya pelapisan berturut-turut sebesar 7,89 dan 1,95 ppm.  


Keywords


Buah tomat, Grafting, Jamur tiram, Kitosan, Sonikasi

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DOI: http://dx.doi.org/10.62870/jip.v13i1.25753

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