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DETERMINATION OF RETENTION INDICES OF ISOPROPYL OLEATE, ISOBUTYL OLEATE, AND DIETHYL-HEXYL PHTHALATE BY USING GAS CHROMATOGRAPHY/MASS SPECTROMETRY Pusfitasari, Eka Dian; Andreas, -
Teknologi Indonesia Vol 36, No 2 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i2.205

Abstract

Diethyl-hexyl phthalate (DEHP) is the most commonly use of phthalate in plastic packed. There were several cases which subtituted the composition of DEHP in the plastic packed with vegetable oil derivative, such asIsopropyl oleate and Isobutyl oleate from palm oil, because DEHP have negative effect for health. Although it has been substituted with the Isopropyl oleate (IPO) and Isobutyl oleate (IBO), to a certain degree, the DEHP could be evaporated from the foil to its surrounding. Therefore, the analysis of both IPO and IBO is very important to be done. Analysis of IPO, IBO, and DEHP were done using GC equipment with DB-5 column and MS detector. Identifi cation by using Kovats Retention Indices (RI) values is believed to provide optimal results in qualitative analysis, since each compound has a different RI value. Determination of RI value of IPO, IBO and DEHP in various parameters using GC-MS instrument at several ramp temperature conditions of GCs column was done. Meanwhile, the variation of temperature and fl ow rate of carrier gas also became parameter to reach different RT to calculate RI. Determination of the retention indices of IPO, IBO, and DEHP showed that RI laid in the near value range. The RIvalues of those three compounds are 2194, 2317, and 2534, respectively. The different retention time of a certain compounds as a result of a shift or changes of testing parameters will not infl uence the value of its retention indices.
THE INFLUENCE OF SOLVENT TYPES ON THE DERIVATIZATION PROCESS USING BIS-TRIMETHYLSILYL TRIFLUOROACETAMIDE (BSTFA) ON COMPOUNDS ANALYSIS OF ACID, BASE, AND ALCOHOL AS A CHEMICAL WEAPONS DERIVATES Pusfitasari, Eka Dian; Andreas, -
Teknologi Indonesia Vol 36, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v36i1.196

Abstract

The existence of chemical weapon compounds is forbidden, but its use is still possible by illegal activities such as terrorism. If the compounds were used, they will soon unravel. Therefore, we have to go through to thedegradation product to detect those compounds. Almost all degradation products of chemical weapons are polar and non-volatile because they have some functional group called -OH and -NH2. Consequently, the analysis of these compounds cannot be directly determined by using gas chromatography without derivatization step process. The aim of this study was to determine the effect of the solvent used as the medium during the process of derivatization using BSTFA. The solvent themselves consist of fi ve types, namely acetonitrile, n-hexane, dichloromethane, chloroform, and carbon tetrachloride. The using of acetonitrile and hexane as the derivatization process media did not yield consistent results on the ratio of the area of the chromatograms. Meanwhile, dichloromethane, chloroform,and carbon tetrachloride generated good results; although for very low analyte concentrations, carbon tetrachloride provided more consistent and higher intensity than the chromatograms of DCM and CHCl3 solvent media. The optimum condition we met from the derivatization process was heat up to 70 C for 30 minutes with the addition of 50 ?l BSTFA, and the solvent used as the derivatization process medium was CCl4.
Co-Authors Pusfitasari, Eka Dian