ABSTRAKPenelitian ini adalah penelitian eksplorasi yang bertujuan untuk mengisolasi dan mengidentifikasi senyawa metabolit sekunder ekstrak n-heksana dari tumbuhan Meniran. Penelitian ini dilakukan melalui beberapa tahap, diantaranya preparasi, ektraksi dengan metode maserasi, partisi, fraksinasi, pemurnian, dan identifikasi. Hasil penelitian berupa dua senyawa kristal putih berbentuk jarum. Senyawa A positif terhadap pereaksi FeCl3 dan senyawa B positif terhadap pereakasi Lieburmann-Buchard. Berdasarkan hasil uji pereaksi dan data FTIR dan UV-Vis, menunjukkan bahwa senyawa A adalah Flavonoid dan senyawa B adalah terpenoid. Kata kunci: Isolasi, P. niruri Linn., Flavonoid dan Terpenoid ABSTRACTThis study is exploratory research that aim to isolate and identify the secondary metabolite compound of n-hexane extract of Meniran plant. This research was carried out in several steps; they were preparation, extraction of sample with maceration, partition, fractionation, purification and identification. The result were two needle white crystal. Compound A positive to FeCl3 reagent, while compound B positive to Liebermann-Burchard reagent. Base on the reagent test and FTIR and UV-Vis data, showed that the compound A is flavonoid and compound B is terpenoid. Keyword: Isolation, P. niruri Linn., Flavonoid and Terpenoid
ABSTRAK Penelitian ini bertujuan untuk mensintesis nanopartikel kitosan menggunakan metode gelasi ionik. Tahapan sintesis meliputi: pembuatan larutan kitosan 0,2% menggunakan asam sitrat 5%, sintesis Nanopartikel Kitosan dengan Na-TPP sebagai pengikat silang, dilanjutkan dengan uji kestabilan nanopartikel menggunakan spektrofotometer UV-Vis. Hasil sintesis nanopatikel dikarakterisasi menggunakan FT-IR, PSA dan uji kadar air. Hasil penelitian menunjukkan bahwa suspensi nanopartikel kitosan-TPP tetap stabil selama penyimpanan 1 hari dan setelah freeze drying diperoleh serbuk berwarna putih dengan kadar air sebesar 7,25%. Hasil Karakterisasi FT-IR mengindikasikan bahwa sintesis nanopatikel telah terbentuk, hal ini dapat dilihat terjadinya pergeseran puncak serapan gugus fungsi sebelum dan setelah terbentuk nanopartikel kitosan. Hasil analisis PSA diperoleh ukuran partikel sebesar 7270,9 nm. Berdasarkan hal tersebut disimpulkan bahwa sintesis nanopartikel kitosan dapat dilakukan dengan metode gelasi ionik dengan kestabilan selama satu hari. Kata kunci: Gelasi ionik, Kitosan-TPP, Nanopartikel ABSTRACT This experiment aimed to synthesize of chitosan nanoparticles using ionic gelation method. Synthesis stages include: preparation of 0.2% chitosan solution using 5% citric acid, synthesis chitosan nanoparticles with Na-TPP as crosslinker, followed by a test of the stability of the nanoparticles using UV-Vis spectrophotometer. The results of synthesis nanopaticles were characterized using FT-IR, PSA and test water content. The results showed that the nanoparticles of chitosan-TPP suspension remained stable for 1 day storage time and after freeze drying obtained in the form white powder with a water content of 7.25%. Characterization of FT-IR results indicate that the synthesis nanopaticles been formed, it can be seen a shift of the absorption peak of functional groups before and after the formation of chitosan nanoparticles. PSA analysis results obtained that particle size at 7270.9 nm. Based on this it was concluded that synthesis of chitosan nanoparticle can be performed with ionic gelation method with stability during one day. Keywords: Gelasi ionic, Chitosan-TPP, Nanoparticles
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