Open AccessSolid Phase Microextraction–Gas Chromatography For The Analysis Of Explosives In Post Blast Water Samples
Author(s) -
Umi Kalthom Ahmad,
Kee Heng Kiu
Publication year - 2012
Publication title -
jurnal teknologi/jurnal teknologi
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.191
H-Index - 22
eISSN - 2180-3722
pISSN - 0127-9696
DOI - 10.11113/jt.v46.289
Subject(s) - solid phase microextraction , chromatography , chemistry , gas chromatography , extraction (chemistry) , analytical chemistry (journal) , gas chromatography–mass spectrometry , mass spectrometry
Dalam kajian ini, teknik pengekstrakan mikro fasa pepejal (SPME) diikuti dengan kromatografi gas (GC) telah digunakan untuk menentukan sisa letupan. Beberapa parameter termasuk masa penjerapan, masa dan suhu nyahjerapan, jenis gentian SPME, kesan pengadukan dan kesan garam telah dioptimumkan untuk mendapat data yang tepat. Penambahan 10% w/v NaCl dalam medium akues dan penggunaan gentian Carboxen/Polidimetilsiloksana (CAR/PDMS) menghasilkan pengekstrakan yang paling cekap. SPME/GC–ECD yang telah dioptimumkan digunakan untuk menganalisis sisa letupan 2,6–dinitrotoluena (2,6–DNT), trinitrotoluena (TNT) dan pentaeritritol tetranitrat (PETN) berjaya dikesan daripada sampel air. SPME/GC–ECD secara rendaman langsung didapati kaedah yang menarik digunakan untuk menganalisis bahan letupan dalam sampel air pasca letupan secara kualitatif dan kuantitatif.Kata kunci: Bahan letupan, SPME rendaman langsung, GC–ECD, sampel air pasca letupan In this study, a solid–phase microextraction (SPME) technique followed by gas chromatography (GC) was used to determine explosive residues. Several parameters including adsorption time, desorption time and temperature, SPME fiber types, stirring effect and salting out effect were optimized to obtain reproducible data with good accuracy. Addition of 10% w/v of NaCl in the aqueous medium and the use of a Carboxen/Polydimethylsiloxane (CAR/PDMS) fiber coating led to optimal extraction efficiencies. The optimized SPME/GC–ECD method was applied to the trace analysis of explosive residues in water samples. 2,6–dinitrotoluene (2,6–DNT), trinitrotoluene (TNT) and pentaerythritol tetranitrate (PETN) were successfully detected from water samples. Direct Immersion SPME/GC–ECD was found to be an attractive technique for qualitative and quantitative analysis of explosives in post blast water samples. Key words: Explosives, direct immersion SPME, GC–ECD, post blast water samples