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All Journal Jurnal Periodic Jurusan Kimia UNP
Iryani Ahmad
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Analisis Kandungan Besi (Fe) dan Magnesium (Mg) dalam Bijih Besi di Daerah Abai Sangir Kabupaten Solok Selatan Secara Spektrofotometri Serapan Atom Elvira Julita; Zul Afkar; Iryani Ahmad
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.986 KB) | DOI: 10.24036/p.v1i1.549

Abstract

Has done research on the determination of iron content (Fe) and magnesium (Mg) in the iron ore Atomic Absorption Spectrophotometric. This study aims to determine the best type of solvent and solvent volume best with ≤ 63μm particle size in determining the content of iron (Fe) and magnesium (Mg) by Atomic Absorption Spectrophotometric and to determine the content of iron (Fe) and magnesium (Mg) in the ore ore. Iron and magnesium content analysis performed by using the method of destruction of wet and conducted some of the variation of solvent variation: concentrated HCl, concentrated HNO3 and HCl - HNO3 concentrated (3:1) or aquaregia as well as the best solvent volume variation is 15 mL, 25 mL, 35 mL , 45 mL and 60 mL. The results showed that the highest iron content obtained by using 25 ml of HCl solvent that is 48.551% at particle size ≤ 63μm and high magnesium levels obtained using 35 mL of solvent aquaregia is 0027% at a particle size ≤ 63 μm.
Sintesis dan Karakterisasi Plastik Ramah Lingkungan dari Nata de manihot Mia Oktarina; Iryani Ahmad; Iswendi Thabrani
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.956 KB) | DOI: 10.24036/p.v1i1.559

Abstract

Plastic is a materials which required in everyday. But its use generate various problem, especially if the plastic used as packer of food. Usage of plastic directly  can give negative impact to health. To overcome the negative impact done by effort one of them making of environment friendly plastic  from natural materials like nata de manihot. The aim of this research are syntesis  plastic sheet  from nata de manihot, knowing the  physical and morphology, and time relation with power of biodegradation. This research early with making of nata de manihot and nata de coco used as comparator.  Measured nata’s thickness, then in press so that form sheet of nata flimsy which still wet. After that, immersion during 14 day in gliserol with concentration variation of 1%, 2%, 3%, and pa. This sheet is dried in the oven at temperature ± 70,  so that yielded sheet of nata which in form of plastic sheet. Its Morphology is analysed by SEM ( Scanning Electron Microscope), its power of biodegradation  tested with burying in ground during 8 days, and each every 2 days measured by weight of  rest of plastic sheet. Pursuant to result of research obtained plastic sheet of nata which is soaked in gliserol at concentration 3% yielding more flexible and  more transparent compared to other concentration. Total biodegradation of plastic nata de manihot is over in 8 days.
Co-Authors Elvira Julita Iswendi Thabrani Mia Oktarina Zul Afkar