A novel ultrasound-assisted back ex

A novel ultrasound-assisted back extraction reverse micelles coupled with gas chromatography-flame ionization detection has been developed for the extraction and determination of some short chain aldehydes in different heated edible oil samples. After the homogenization of the oil samples with Triton X-100, 200 mu L of methanol was added to facilitate the phase separation. The aqueous micelle phase has been separated by centrifugation, then it was treated with a mixture of H2O: CHCl3 and ultrasonic vibration, were used to effectively back-extraction of the analytes into the chloroform phase. The sedimented organic phase was obtained after centrifugation, withdrawn into the microsyringe and directly injected into the GC-FID system. The calibration graphs were linear in the range 0.05-20 mg L-1. The limits of detection were in the range of 0.02-0.15 mg L-1. This procedure was successfully applied for determination of propanal, butanal, hexanal and heptanal in real heated oil samples. (C) 2015 Elsevier Ltd. All rights reserved.

ผลลัพธ์ (แอฟริกา) 1:

A Novel-ultraklank bygestaan ​​terug onttrekking omgekeerde miselle tesame met gaschromatografie-vlam ionisasie opsporing is ontwikkel vir die ontginning en vasberadenheid van 'n paar kort ketting aldehiede in verskillende verhitte eetbare olie monsters. Na afloop van die homogenisering van die olie monsters met Triton X-100, 200 mu L van metanol is bygevoeg om die fase skeiding te fasiliteer. Die waterige fase miselle is geskei deur sentrifugering, dan was dit behandel word met 'n mengsel van H2O: CHCl3 en ultrasoniese vibrasies, is gebruik om effektief te back-onttrekking van die analiete in die chloroform-fase. Die sedimented organiese fase is verkry na sentrifugering, teruggetrek in die microsyringe en direk ingespuit in die GC-FID stelsel. Die kalibrasie grafieke is lineêr in die reeks 0,05-20 mg L-1. Die grense van die opsporing was in die reeks van 0,02-0,15 mg L-1. Hierdie proses is suksesvol toegepas vir die bepaling van propanal, butanal, hexanal en heptanal in real verhitte olie monsters. (C) 2015 Elsevier Ltd Alle regte voorbehou.