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All Journal Jurnal Kimia Mulawarman
Erwin Erwin
Jurusan Kimia FMIPA Universitas Mulawarman
Chemistry

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IDENTIFIKASI SENYAWA METABOLIT SEKUNDER EKSTRAK n-HEKSANA DAUN BERWARNA MERAH DARI Syzygium myrtifolium Walp. Tri Novianti; Chairul Saleh; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 17 No 1 (2019)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v17i1.432

Abstract

Pucuk Merah (Syzygium myrtifolium Walp.) is one of the plants belonging to the genus Syzygium family Myrtaceae. This study has been carried out to isolate and identify secondary metabolite from red leaf of Syzygium myrtifolium Walp. This research was conducted by extracting Syzygium myrtifolium Walp. leaf with Etanol followed by partition using n-Hexane, n-Hexane extact was separated by Coloum Chromatography with system isokratik. The separation of produce a compounds isolated as white powder. The result of GC-MS analysis was suggested 3 major compounds that 1-Octadecene; bis (2-ethylhexyl) hexanedioic; and bis (2-ethylhexyl) phthalate with a molecules weight in a row 252; 370 and 390.
Analisis Kadar Ion Pb2+ Pada Kangkung Darat (Ipomea Reptans Poir) Yang Diberi Air Lindi Dari Tpa Sampah Bukit Pinang Samarinda Hamsina Hamsina; Bohari Yusuf; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i1.545

Abstract

The Research to determine the levels of Pb ion on swamp cabbage (Ipomoea reptans Poir) where each of media cropping given variation of leachate volume from TPA Bukit Pinang Samarinda for every 10 kg of soil has been carried out. Swamp cabbage was analyzed in the roots, stems and leaves at the age of 2 weeks to 4 weeks. The levels of Pb2+ ion was determined by dry destruction method, then measured by atomic absorption spectrophotometry. Pb2+ ion was accumulated on the ground kale plants. The highest levels of Pb2+ ion was contained in the roots of ground kale plants on media cropping which added 1.5 L of leachate at the age of 3 weeks of 2.0642 mg / kg wet weight. The lowest level of Pb2+ ion was contained in the leaves of control plants at the age of 2 weeks that was 0.0177 mg / kg wet weight.
KAJIAN PERUBAHAN UKURAN RONGGA ZEOLIT RHO BERDASARKAN VARIASI RASIO Si/Al DAN VARIASI KATION ALKALI MENGGUNAKAN METODE MEKANIKA MOLEKULER Wahdana Kusuma Sari; Rahmat Gunawan; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 14 No 1 (2016)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The structure modeling of zeolite RHO with variation of Si/Al ratio (5; 4.33; 3.8; 3.36; 3; 2.69; 2.43; 2.2; 2) and variation of alkaline cations (Li+, Na+, K+, Rb+, Cs+, Fr+) calculated by the molecular mechanics method has been investigated. The result shows that the structure of zeolite RHO with Si/Al ratio 3.36 has the most stable structure with a minimum energy 2652.0308 kcal/mol. The most stable structures of zeolite RHO impregnated with cation is that impregnated with Fr+ (alkaline) with a minimum energy 3006.6587 kcal/mol. The result shows that the zeolite RHO structure with cations Fr+ (alkaline) has the largest pore diameter which potentially has the best adsorption capacity.
Co-Authors Bohari Yusuf Chairul Saleh Hamsina Hamsina Rahmat GUnawan Tri Novianti Wahdana Kusuma Sari