A highly automated method for simultaneous determination of sterols, erythrodiol and uvaol in olive oils

2016 ◽  
Vol 8 (20) ◽  
pp. 4022-4027 ◽  
Author(s):  
Qiang Gu ◽  
Xiaojuan Yi ◽  
Jinling Shen ◽  
Jing Shi ◽  
Yijun Liu ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Gel Permeation Chromatography ◽  
Simultaneous Analysis ◽  
Olive Oils ◽  
Automated Method ◽  
Gel Permeation ◽  
Erythrodiol And Uvaol

In this work, we presented a highly automated method for the simultaneous analysis of sterols, erythrodiol and uvaol in olive oils with the use of gel permeation chromatography (GPC), an automatic solvent evaporator and LC-MS.

Determination of iV-Methylcarbamate Pesticides in Liver by Liquid Chromatography

1989 ◽  
Vol 72 (4) ◽  
pp. 586-592 ◽  
Author(s):  
Sher M Ali
Keyword(s):  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
Fluorescence Detection ◽  
Methylene Chloride ◽  
Gel Permeation Chromatography ◽  
Purification Technique ◽  
Coefficients Of Variation ◽  
Gel Permeation ◽  
Liquid Chromatographic

Abstract A liquid chromatographic (LC) method using a 2-step purification technique for the simultaneous determination of 10 carbamates in bovine, swine, and duck livers has been developed. Carbamates are extracted from liver samples with methylene chloride. After evaporation, the residues from the extract are dissolved in methylene chloride- cyclohexane (1 + 1) and cleaned up by gel permeation chromatography. The eluate containing carbamate residues is evaporated to dryness, reconstituted in methylene chloride, further purified by passing it through an aminopropyl Bond Elut extraction cartridge, and analyzed by liquid chromatography using post-column derivatization with orthophthalaldehyde and fluorescence detection. Excitation and emission are set at 340 and 418 nm, respectively. Liver samples for beef, pork, and duck were fortified with 5, 10, and 20 ppb of mixed carbamate standards. The average of 10 recoveries of 10 carbamates at all 3 levels of fortification was greater than 80% with coefficients of variation less than 17%.

Determination of immunoglobulin G in mare colostrum by high-performance gel permeation chromatography

2011 ◽  
Vol 29 (3) ◽  
pp. 265-268
Author(s):  
Yuewen LU ◽  
Hongjuan WANG ◽  
Jie YANG
Keyword(s):  
Immunoglobulin G ◽  
High Performance ◽  
Gel Permeation Chromatography ◽  
Gel Permeation
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