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All Journal Jurnal Natur Indonesia Teknologi Indonesia Jurnal Riset Fisika Indonesia
Oman Zuas
Research Centre for Chemistry, Indonesian Institute of Science (RCChem-LIPI), Kawasan PUSPIPTEK Serpong, 15314 Tangerang, Banten
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Materials Science & Nanotechnology Physics

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FLOW RATE OF CARRIER GAS AFFECTING THE KEY PARAMETERS OF GC-TCD FOR CO2, C3H8, AND CO ANALYSIS: AN EXPERIMENTAL INVESTIGATION Zuas, Oman; Budiman, Harry
Teknologi Indonesia Vol 39, No 2 (2016)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v39i2.240

Abstract

This paper reports on the effect of flow rate of helium (He) carrier gas on the key parameters of gas chromatography equipped with thermal conductivity detector (GC-TCD) for the measurement of carbon dioxide (CO2 ), propane (C3H8) and carbon monoxide (CO) in gravimetric standard gas mixture (Grav-SGM). The carrier gas has a function to transport vaporized molecules through the column during the GC separation process. The study provides opportunity to experimentally investigate the effect of gas flow rate on the several key parameters of the GC-TCD including retention time, peak area, peak height, response factor, resolution and selectivity. The results show that all key parameters were found to be carrier gas flow rate dependent. The increase of the gas flow rate could significantly decrease the retention time, peak area and response factor of the gas components. While both resolution and selectivity factor were observed to have a substantial decrease with increasing the flow rate of carrier gas. Therefore, proper selection of flow rate level of carrier gas is suggested before a GC measurement is carried out for obtaining an optimum condition.
Extraction of Chemical Warfare Agents from Soils: Case Study on O-ethyl S-2-(diisopropylamino)ethyl methylphosphonothiolate (VX) Zuas, Oman
Jurnal Natur Indonesia Vol 11, No 1 (2008)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (109.556 KB) | DOI: 10.31258/jnat.11.1.1-7

Abstract

Extraction of chemical warfare agents, O-ethyl S-2-(diisopropylamino)ethyl methylphosphonothiolate (VX) in soilsample has been carried out. The extraction was performed using six different solvents including 1% TEA/MeOH,1% NH4OH/MeOH, water pH 2 at the ambient temperature , water pH 2 at temperature 4 0C, water pH 7 at ambienttemperature, and water pH 7 at temperature 4 0C. Percent recovery of VX in soil samples was quantitativelydetermined by mean LC-MS using selected reaction monitoring (SRM). Among the solvents used, water pH 2 attemperature 40C gave the best extraction capability that was indicated by the highest percent recovery of VXobtained. Storing effect of spiked samples was also investigated by extracting the samples containing VX usingwater at pH 2/40C and the degradation product was then identified using multiple reaction monitoring (MRM). Fromthe study, two degradation products were identified as Bis[2-(diisopropylamino)ethyl]disulphide and ethylmethylphosphonate.
Analisis Bibliometrik Penelitian Bio-Sintesis Nanopartikel Perak (NP-Ag) di Indonesia Zuas, Oman; Nazarudin, Nazarudin; Yudha, Salprima; Yaumidin, Umi K; Yuwono, Suripto D; Aritonang, Anthoni B
Jurnal Riset Fisika Indonesia Vol 1 No 2 (2021): Juni 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v1i2.2380

Abstract

Tulisan ini menyajikan analisis bibliometrik terhadap artikel ilmiah yang terbit dalam kurun waktu 2011-2020 terkait penelitian bio-sintesis nanopartikel perak (NP-Ag) di Indonesia. Analisi bibliometric dilakukan terhadap 55 artikel ilmiah yang diperoleh melalui pencarian di database Scopus. Hasil analisis menunjukkan bahwa penelitian dan pengembangan bio-sintesis NP-Ag di Indonesia cukup mendapat banyak perhatian yang dibuktikan oleh adanya temuan berikut. Trend pertumbuhan artikel ilmiah terkait NP-Ag diperkirakan masih akan terus mengalami kenaikan untuk beberapa tahun ke depan. Posisi pertama untuk peneliti dan institusi yang paling produktif dalam memublikasikan artikel ilmiah adalah masing-masing ditempati oleh Handayani, W., dan Universitas Indonesia (UI). Handayani, W. juga diketahui merupakan peneliti yang mempunyai jaringan kolaborasi yang terbanyak, dan untuk kolaborasi tingkat insitusi, di tempati oleh Institut Teknologi Sepuluh November (ITS). Untuk jurnal sebagai sumber artikel ilmiah yang paling menonjol ditempati oleh “Biointerface Research in Applied Chemistry”. Lebih lanjut, hasil analisis konten terhadap 55 jurnal ilmiah yang terbagi menjadi tiga klaster menunjukkan bahwa penelitian bio-sintesis dimasa yang akan datang hendaknya melibatkan peneliti dari multidisiplin ilmu dengan hasil yang lebih inovatif, dengan arah dan skala pengembangan NP-Ag yang bersifat aplikatif, serta menuju arah industrilisasi.
Co-Authors Aritonang, Anthoni Batahan Harry Budiman Mulyana, Muhammad Rizky Nazarudin Nino Rinaldi Sabar Simanungkalit, Sabar SALPRIMA YUDHA S Yaumidin, Umi K Yuwono, Suripto D