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Akkas, Erwin
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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PHYTOCHEMICAL AND TOXICITY TEST OF MERUNG EXTRACTS (Coptosapelta tomentosa (Blume) Karolina, Anita; Pratiwi, Djihan Ryn; Akkas, Erwin
JURNAL ATOMIK Vol 3 No 2 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This study was conducted to determine the content of secondary metabolites and the toxicity of extracts of Merung various parts (Coptosapelta tomentosa (Blume). The research methods included maceration, phytochemical tests and toxicity tests using the BSLT method. Based on the results of the phytochemical test showed all extracts of Merung parts contained steroids, flavonoids, and phenolics. Saponin is only found in leaf extract. Toxicity tests using the BSLT method showed that stem and root extracts were toxic with LC50 values of 2004.06 and 173.09 ppm, respectively.
PENURUNAN BOD dan TSS PADA LIMBAH INDUSTRI SAUS SECARA ELEKTROKOAGULASI MENGGUNAKAN ELEKTRODA Fe, Cu dan STAINLESS Yuliani, Ika; alimuddin, Alimuddin; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Research about decreasing of BOD and TSS from waste in ketchup industry with Electrocoagulation method using Fe, Cu and Stainless electrode for decreasing BOD and TSS have been done. Time optimization based by color transformation from Electrocoagulation process have been done. The result of this research from the effect of time contact on Electrocoagulation process are showed the optimized time are 120 minutes whereas the transformation color into transparent color in 12 Volt using Fe-Cu electrode to the decreasing of BOD and TSS are 1800,6 mg/L ; 190 mg/L with the result of percent of elimination are 38,45% ; 68,85% whereas the value of starter of BOD and TSS are 2925,4 mg/L ; 190 mg/L.
Pembuatan dan Karakterisasi Membran Selektif Ion Timbal (II) dengan Menggunakan Etilen Diamin Tetra Asetat (EDTA) sebagai Ionofor Waqifah, Ummul; Panggabean, Aman S.; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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A research about preparation and characterization of Plumbum (II) ion selective membrane using a PVC based on ethylene diamine tetraacetate as ionophores have been done. Ethylene diamine tetra acetate (EDTA) was able to coordinate with Pb2+ and increase the conductivity of the membrane. Ethylene diamine tetra acetate (EDTA) as the main ingredient mixed with polyvinylchloride (PVC) as a matrix whose first dissolved using tetrahydrofuran (THF), added dioctyl phat alate (DOP) as a plasticizer. The membrane was soaked with Pb2+ for 2 days and membrane absorption ability of EDTA to the metal dopant Pb2+, and measured using atomic absorption spectrophotometer (AAS). Membrane absorption ability of the dopant metal Pb2+ retrieved the percent absorption was 76.01 % at the optimum composition of the membrane with a ratio of EDTA: PVC: DOP is 60: 30: 10. EDTA membrane characterization results with Fourier transform infrared spectroscopy (FT-IR) showed specific functional groups on the membrane EDTA.
PENGEMBANGAN METODE RAPID TEST DALAM PENENTUAN ASH CONTENT DAN CALORIFIC VALUE BATUBARA DI LABORATORIUM PT JASA MUTU MINERAL INDONESIA Kumalasari, Anisa; Panggabean, Aman Sentosa; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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A research on development of rapid test methods for two parameters, calorific value and ash content, based on the needs of minimum time analysis has been conducted. This study aims to determine whether the analytical performance of rapid test methods is comparable with the standard methods. The results showed that the standard and the rapid test method have good analytical performance. Accuracy results which is expressed as recovery percentage show that the calorific values of both methods were in the range of 99.75 % - 100.40 % and the ash content values ​​with both methods were in the range of 93.33 % - 103.70 %. Precision results by CV percentage showed that the calorific value were 0.21 % and 0.23 %, and the value of ash content were 4.03% and 4.28%. For the ruggedness parameter test, the success rate was almost for the entire parameter, excepts for precision test where the ash content value obtained has CV percentage ≥ 5 %. Nevertheless, the overall parameters of the test and the analytical performance analysis are extremely good and acceptable according to the references and a rapid test method can be used as an alternative method.
Penentuan Derajat Esterifikasi Dengan Metode Base Line Pada Sintesis Aldimin Kitosan Asetat Melalui Reaksi Esterifikasi Dari Aldimin Kitosan Dengan Asetat Anhidrida Churohma, Mifta; Tarigan, Daniel; Akkas, Erwin
JURNAL ATOMIK Vol 2 No 1 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Determination degree of esterification with the baseline on the synthesis method aldimine chitosan acetate by esterification of aldimine chitosan with acetic anhydride has done. In this research, chitosan modified by chemical being aldimine chitosan acetate. Synthesis aldimine chitosan acetate produced by the esterification reaction between aldimine chitosan with acetic anhydride. The result of FT-IR analysis of aldimine chitosan acetate showed in wavenumbers 3448.72 cm-1, which indicated stretching vibration hydroxyl group -OH. Vibration absorption wave numbers 1735.93 cm-1 indicated carbonyl group C = O, ester and backed group C-O-C with wavenumbers 1033.85 cm-1. vibration absorption in wavenumbers 1651.07 cm-1 indicated the presence of C = N. Degree of esterification or degree of acetylation (DA) in aldimine chitosan acetate assign value 82.85%.
Co-Authors Aman S. Panggabean Aman Sentosa Panggabean Anita Karolina, Anita Churohma, Mifta Daniel Tarigan Djihan Ryn Pratiwi, Djihan Ryn Kumalasari, Anisa Waqifah, Ummul Yuliani, Ika