Food analysis. Determination of pesticide residues by GC-MS. Retention times, mass spectrometric parameters and detector response information

2013 ◽  
Keyword(s):  
Food Analysis ◽  
Pesticide Residues ◽  
Mass Spectrometric ◽  
Detector Response ◽  
Response Information ◽  
Analysis Determination

Wide-Bore Capillary Gas Chromatographic Determination of Organophosphorus Pesticide Residues in Foods: Interlaboratory Trial

1994 ◽  
Vol 77 (1) ◽  
pp. 92-101
Author(s):  
Charles H Parfitt
Keyword(s):  
Pesticide Residues ◽  
Stationary Phases ◽  
Packed Column ◽  
Capillary Columns ◽  
Packed Columns ◽  
Detector Response ◽  
Official Method ◽  
Methyl Silicone ◽  
Interlaboratory Trial

Abstract Wide-Bore capillary columns are often used as alternatives to traditionally packed columns for gas chromatographic (GC) determination of pesticide residues in foods. Fused silica columns with cross-linked, bonded stationary phases are reproducible, rugged, and easy to use and are substantially more inert than their packed column equivalents. An interlaboratory trial was conducted in 5 U.S. Food and Drug Administration laboratories to determine the practicability of using isothermal wide-bore capillary GC as an alternative to the packed column GC systems used in AOAC Official Methods for determining pesticide residues in foods. Two wide-bore capillary columns with flame photometric detection were evaluated with respect to the following: linearity of detector response; repeatability of response for equal and unequal injection volumes of standard solutions; accuracy of quantitating pesticides in food extracts when the injection volumes or analyte concentrations of the standard solution and the food extract are different; recoveries of 23 pesticides from 5 fortified food extracts, calculated from both duplicate and single injections; and relative retention times. Before shipment, food extracts supplied to participants were fortified with pesticides after preparation and extraction of the foods by Official Method 985.22. The performance of wide-bore capillary columns with cross-linked bonded methyl silicone and methyl phenyl silicone stationary phases was equal or superior to that of the packed columns specified in the Official Method.

Enzymatic methods in food analysis: determination of ascorbic acid

2006 ◽  
Vol 573-574 ◽  
pp. 125-132 ◽  
Author(s):  
Tatyana N. Shekhovtsova ◽  
Svetlana V. Muginova ◽  
Julia A. Luchinina ◽  
Anna Z. Galimova
Keyword(s):  
Ascorbic Acid ◽  
Food Analysis ◽  
Analysis Determination ◽  
Enzymatic Methods
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