The objective of this research was to determine a stable formula and determine the influence of carbopol enhancing in the preparation of lime extract (Citrus aurantifolia S.) transparent liquid shampoo (TLS). Shampoo made from TLS formulation lime extract in three different concentration of carbopol (0.5% : 0.6% : 0.7%). Shampoo were then characterized for stability test before and after accelerated storage include organoleptic test, the foam test, test the pH stability, viscosity measurements, and rheological. The result of organoleptic observation before and after accelerated storage, either formula with concentration of carbopol 0.5%, 0.6%, or 0.7%, did not show a change for the color, smell and consistency. There are no differences in foam test from TLS with shampoo preparations comparison. There are no change of PH test in TLS with concentration of carbopol 0.5%, 0.6%, or 0.7% before and after accelerated storage. There are no change of viscosity test in TLS with concentration of carbopol 0.5%, 0.6%, or 0.7% before and after accelerated storage. Third shampoo formula has plastic flow. Formulation of TLS with concentration of carbopol 0.5% have the most optimal stability than TLS with concentration of carbopol 0.6% and 0.7%.
Senyawa antioksidan alami dapat ditemukan dalam buah-buahan. Salah satu contoh limbah tanaman yang merupakan sumber antioksidan alami yaitu kulit buah naga (Dragon fruit) yang merupakan limbah buah naga (Hylocereus polyrhizus) yang pemanfaatan dan penelitiannya masih terbatas. Pada Penelitian ini dilakukan Isolasi Senyawa antioskidan yang terdapat pada kulit buah naga merah (KBNM). simplisia KBNM segar diekstraksi dengan metode maserasi dengan menggunakan pelarut methanol. Proses selanjutnya dilakukan pemisahan kepolaran kandungan kimia dengan metode cair-cair, esktrak disuspensikan menggunakan air dan di partisi dengan hexan dan etil asetat. Fraksi n-heksan direkristalisasi selanjutnya dilakukan isolasi menggunakan kromatografi lapis tipis (KLTP). Berdasarkan hasil KLTP fraksi n-heksan diperoleh 8 pita tetapi hanya pita 6 (isolat I) dan 8 (isolat II) yang aktif sebagai antioksidan setelah penyemprotan DPPH. Hasil spektroskopi UV-Vis isolat II diduga merupakan senyawa flavonoid. Hasil pengujian aktivitas antioksidan diketahui bahwa ekstrak methanol, fraksi n-heksan dan etil asetat dari kulit KBNM (Hylocereus polyrhizus) memiliki aktivitas antioksidan yang kurang aktif, sedangkan fraksi air tidak aktif sebagai antioksidan.
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