FORMULASI PENAMBAHAN TEPUNG GLUKOMANAN DARI PORANG (Amorphophallus muelleri Blume) DAN GULA AREN (Arenga pinnata) PADA PEMBUATAN SUSU KEDELAI MENGGUNAKAN RANCANGAN METODE MIXTURE OPTIMAL CUSTOM DESIGN
DOI:
https://doi.org/10.21776/ub.jtp.2024.025.01.7Keywords:
Glukomanan Porang, Gula Aren, MOCD, Stabilitas, Susu KedelaiAbstract
Susu kedelai merupakan minuman sumber protein nabati. Permasalahan susu kedelai ada 2, yakni stabilitas rendah dan tinggi kalori, karena memakai pemanis gula tebu. Tujuan penelitian ini membuat minuman susu kedelai yang menunjukkan stabilitas tinggi dan rendah kalori, dengan membuat formula yang terdiri atas: susu kedelai, menambahkan tepung glukomanan porang dan mengganti gula pasir dengan gula aren. 16 total perlakuan dirancang dengan metode Mixture Optimal Custom Design (MOCD) memakai Design Expert Versi 13, dengan 3 variabel bebas: proporsi susu kedelai, tepung glukomanan porang dan gula aren. Respon percobaan: total gula dan stabilitas susu kedelai. Hasil verifikasi dibandingkan dengan susu kedelai komersil merk: “Soybaru”. Hasil penelitian menunjukkan perlakuan formula optimum (prediksi DX) adalah: susu kedelai 88,5 g, proporsi glukomanan (GM) porang 1,5 g dan gula aren 10 g, dimana kandungan total gula sebesar 4,41% dan stabilitas 97,51% dengan nilai desirability 91,8%. Uji verifikasi menunjukkan hasil yang tidak berbeda nyata (p<0,05) dengan prediksi DX formula susu kedelai. Susu kedelai hasil verifikasi menunjukkan data kadar total gula 4,72% dan stabilitas 97,67%. Mutu susu kedelai hasil verifikasi dengan susu kedelai komersial merk ”Soybaru” berbeda sangat nyata (p-value<0,001) untuk respon total gula dan stabilitas, namun tidak berbeda nyata (p-value >0,05), untuk kadar protein, total lemak, pH, bau, rasa, warna dan penerimaan secara keseluruhan.
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