Liquid-gas-liquid technique for microextraction and preconcentration of short chain fatty acids from aqueous samples.
In this study, an organic solvent-free microextraction technique termed liquid-gas-liquid microextraction (LGLME) was applied for cleanup and preconcentration of volatile short chain fatty acids in beverages and dairy products. Various parameters affecting the extraction efficiency such as extraction time, stirring speed, sodium chloride content, concentration and volume of donor and acceptor phases, and extraction temperature were studied. Repeatability (RSD, 4.2-8.5%), correlation coefficients (0.998-0.999), LODs (10-20 microg/L) and enrichment factors (152-249) were also investigated. Recoveries were achieved in the range of 90-102% in different matrices. The presented method was applied for the analysis of target analytes in some samples such as grape juice, vinegar and dairy products.
Farajzadeh
Mir Ali
MA
Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran. mafarajzadeh@yahoo.com
Assadi
Arsalan
A
D001628:Beverages; D002849:Chromatography, Gas / Q000379:methods*; D002853:Chromatography, Liquid / Q000379:methods*; D003611:Dairy Products; D005232:Fatty Acids, Volatile / Q000302:isolation & purification*; D005504:Food Analysis; D006863:Hydrogen-Ion Concentration; D012965:Sodium Chloride; D013696:Temperature; D013997:Time Factors
D005232:Fatty Acids, Volatile; D012965:Sodium Chloride