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All Journal Jurnal Kimia Mulawarman JURNAL ATOMIK
Rita Hairani
Jurusan Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Mulawarman
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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validasi Rika anggraini; Rita Hairani; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 16 No 1 (2018)
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.v16i1.667

Abstract

The research about validation of the method of Hg determination on the sample from wastewater treatment plant (WWTP) PT. Badak NGL Bontang, Kalimantan Timur using cold vapour-atomic absorption spectrophotometer (CV-AAS) techniques has been conducted. To obtain a valid measurement result, determinations of the important several parameters that influence the method validation are used. The results of research showed that 20% SnCl2 solution could be used as a reducing agent. The analytic performance of measurement obtain is good, showed with the linearity (r) value ≥ 0.995, LOD was 0.2530 ppb, LOQ was 0.8432 ppb, MDL was 0.6427 ppb and repeatability and reproducibility are shown as % RSD < 2/3 CV Horwitz values. The accuracy of this method is very good with a percentage of recovery value of 114.88%. Based on the results of this research, CV-AAS method can be used in the determination of Hg in WWTP samples with the valid results.
ISOLATION OF LIPASE PRODUCING BACTERIA FROM HOT SPRINGS OF LONG KALI Dessy Noor Alawiyah; Winni Astuti; Rita Hairani
JURNAL ATOMIK Vol 6 No 1 (2021)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Isolasi bakteri penghasil lipase dari sumber air panas Long Kali dilakukan dengan menyeleksi koloni bakteri pada media Nutrient Agar (NA) yang mengandung Rhodamin B dan minyak zaitun. Hasil isolasi menunjukkan 5 dari 14 isolat bakteri mampu menghasilkan lipase. lima isolat tersebut diuji aktivitas lipase dengan metode titrimetri, isolat dengan kode 14 memiliki aktivitas tertinggi dengan aktivitas 2,20 Unit/mL.
Co-Authors Aman Sentosa Panggabean Dessy Noor Alawiyah Rika anggraini Winni Astuti