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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences JURNAL GIZI INDONESIA Teknologi Indonesia Makara Journal of Science Jurnal Kefarmasian Indonesia
Galuh Widiyarti
Research Center for Chemistry (RCC-Chem), Indonesian Institute of Sciences (LIPI), Kawasan PUSPIPTEK Serpong, Tangerang Selatan, Banten 15314
Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Environmental Science Health Professions Medicine & Pharmacology

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Journal : Makara Journal of Science

 1 
PREPARATION OF 2-AMINOETHYLSULFONIC ACID Widiyarti, Galuh; Hanafi, Muhammad; Isnijah, Siti; Kardono, Broto Sugeng; Ermawan, Ermawan; Ngadiman, Ngadiman; Sundowo, Andini
Makara Journal of Science Vol. 13, No. 1
Publisher : UI Scholars Hub

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Preparation process of 2-aminoethylsulfonic acid (taurine) from ethanolamine, sulfuric acid and sodium sulfite has been studied. The process involves two steps of reactions, the first was esterification of ethanolamine (H2N-CH2-CH2-OH) with sulfuric acid to produce the intermediate product of 2-aminoethyl ester (H2N-CH2-CH2-OSO3H) which then was extended to the second step by sulfonation with sodium sulfite to produce 2-aminoethylsulfonic acid (H2N-CH2-CH2- SO3H). These two process conditions were observed by varying mole ratio of reactants, temperature and time period of reactions. Taurine product was qualitatively analyzed using 1 H-NMR and LC-MS. Physical-chemical analysis were done by observing its melting point and determining its water, chloride and sulfate contents. Its melting point, water content, and sulfate content were 290o C, 0.303%, and 3 ppm, respectively, while its chloride content was undetected. After purification, the yield of process was 25.57%.
THE FREE RADICAL SCAVENGING AND ANTI-HYPERGLYCEMIC ACTIVITIES OF VARIOUS GAMBIERS AVAILABLE IN INDONESIAN MARKET Widiyarti, Galuh; Sundowo, Andini; Hanafi, Muhammad
Makara Journal of Science Vol. 15, No. 2
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Co-Authors AA Sudharmawan, AA Agustine Susilowati Akhmad Darmawan Andini Sundowo Aspiyanto, - Dewijanti, Indah Dwiatmi Ermawan Ermawan Hani Mulyani, Hani Heri Syahrian, Heri Kardono, Broto Sugeng Lia Meilawati Lotulung, Puspa Dewi N. Megawati - Minarti Minarti Muhammad Hanafi Ngadiman Ngadiman Nina Artanti Rizna Triana Dewi Siti Isnijah Sofa Fajriah Supriadi, Edi Teni Ernawati Tiara, Yova