ABSTRAKLuasnya penggunaan selai pada produk makanan, menyebabkan permintaan produk selai terus meningkat. Eksplorasi bahan baku selai harus dilakukan untuk memenuhi permintaan konsumen. Penggunaan bunga mawar sebagai bahan baku selai dirasa tepat karena kandungan bunga mawar yang bermanfaat serta warna bunga mawar yang menarik. Masalah pada selai dengan bahan baku bunga mawar, yaitu selai tidak bisa mengental sehingga perlu penambahan tepung maizena sebagai agen pengental. Masalah lainnya, warna merah pada bunga mawar hilang seiring dengan proses pengolahan sehingga perlu penambahan asam sitrat agar pigmen antosianin pada mawar dapat stabil. Penelitian ini bertujuan untuk mengetahui penambahan konsentrasi asam sitrat dan tepung maizena yang optimal agar menghasilkan selai mawar yang berkualitas baik. Metode yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) dengan 2 faktor. Faktor I yaitu penambahan maizena (5%, 6%, 7%). Faktor II yaitu penambahan asam sitrat (0.30%; 0.50%; 0.70%). Kombinasi yang diperoleh sebanyak 9 dengan 3 kali ulangan sehingga diperoleh 27 satuan percobaan. Hasil penelitian dianalisis dengan Analysis of Variance (ANOVA) dan dilakukan uji lanjut dengan uji BNT atau uji DMRT dengan selang kepercayaan 95% dan uji non parametrik kruskal-wallis. Hasil perlakuan terbaik selai mawar diperoleh berdasarkan metode metode Zeleny. Perlakuan terbaik selai mawar dengan penambahan asam sitrat sebanyak 0.70% dan tepung maizena sebesar 5%. ABSTRACTThe widespread use of jam products, causing the demand for jam continuous to increase. Exploration of raw materials of jam should be done to meet consumer demand. The use of roses as a raw material considered appropriate because of useful content of roses and the attractive color. One of the problems in the roses as the raw material is rose jam can not be thickened thus it needs addition of corn starch as thickening agent. Another problem is losing red color of roses during the process thus it needs addition of citric acid to stabilize the anthocyanin pigment. This research aims to determine the addition of corn starch and citric acid concentration to produce good quality of rose jam. The method that being used was Randomized Block Design with 2 factors. Factor I is the addition of corn starch (5%, 6%, 7%). Factor II is the addition of citric acid (0.30%; 0.50%; 0.70%). The combination obtained by 9 and with 3 replication, so the total of combination is 27 of units of experiements. The result were analyzed by Analysis of Variance (ANOVA) and tested with BNT test or DMRT test with 95% interval confidence and Kruskall-wallis as non parametric test. The best treatment of rose jam was obtained based on Zeleny method.
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