Stabilitas Warna Ekstrak Selama Penyimpanan

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Antioxidant activity and phenolic compounds in selected herbal. J. Agric. Food Chem. 4911:5165:5170 Zheng Y, Wang CY, Wang SY, Zheng W. 2007. Changes in strawberry phenolics, anthocyanins, and antioxidant capacity in respose to high oxygen treatment.LWT- Food Sci. Tech. 40:49. LAMPIRAN 66 Lampiran 1 Data hasil panen kelopak bunga teleng Untuk keperluan penelitian ini bunga teleng diperoleh dari tanaman yang ditanam pada lahan seluas 4 m 2 . Tanaman ini ditanam pada tanggal 11 Maret 2011 dan digunakan untuk penelitian yang berlangsung antara Desember 2011 hingga Maret 2012. Selain karakteristik berat kelopak, dihitung pula hasil panen bunga teleng. Jumlah sampel untuk pengukuran berat adalah 40 helai kelopak bunga teleng, sedangkan hasil panen dihitung sebagai rata-rata dari 8 kali pemanenan. Data hasil pengukuran adalah sebagai berikut. Berat kelopak, g Dengan pangkal 0,36 ± 0,01 Tanpa pangkal 0,22 ± 0,01 Rendemen, 59,51 ± 1,33 Kadar air, 89,24 ± 0,54 Hasil panen, gm 2 Dengan pangkal 26,39 Tanpa pangkal 16,08 67 Lampiran 2 Kurva baku asam galat Kurva baku asam galat diperlukan untuk menghitungan kandungan total fenol pada sampel. Untuk membuat kurva baku ini disiapkan 4 larutan asam galat yang berbeda-beda, kemudian serapan cahayanya diukur pada panjang gelombang 765 nm. Kemudian dihitung persamaan regresi yang menghubungkan konsentrasi asam galat dengan absorbansinya. Tabel dan grafik pengukuran absorbansi asam galat serta persamaan liniernya adalah sebagai berikut : Konsentrasi mgl Absorbansi A 68 0,405 102 0,629 136 0,966 272 2,222 y = 0.009x - 0.254 R² = 0.998 0.0 0.5 1.0 1.5 2.0 2.5 50 100 150 200 250 300 Konsentrasi Asam Galat mgL A b s o rb a n s i A