Separation and Determination of Diesel Contaminants in Various Fish Products by Capillary Gas Chromatography

1991 ◽  
Vol 74 (6) ◽  
pp. 986-990
Author(s):  
J M Newton ◽  
Barry S Rothman ◽  
F Ann Walker
Keyword(s):  
Diesel Fuel ◽  
Capillary Column ◽  
Fused Silica ◽  
Fish Products ◽  
Seafood Products ◽  
Fused Silica Capillary ◽  
Carry Over ◽  
Gas Chromatographic Method ◽  
Silica Capillary Column

Abstract A semiquantitative capillary column gas chromatographic method Is described for the determination of diesel fuel contamination in various canned seafood products. The diesel contaminants are separated from the fish sample by steam distillation, with little carry-over of interfering intrinsic materials such as fish oils. The diesel fuel is extracted from the condensate with n-hexane, and the extract is analyzed on an SPB-1 fused silica capillary column. The efficiency of recovery of diesel fuel added to canned seafood at levels of 40-400 ppt ranged from 72 to 102%. With the additional step of concentrating the hexane extract, the sensitivity of this procedure may be increased at least 10-fold. This procedure can detect the differences among diesel fuel grades No. 1,2, and 5, and variations within diesel grade No. 2, and thus may be useful in determining the type of petroleum contaminants present in various canned fish products.

Bonded Fused Silica Capillary Column GLC Determination of BHA and BHT in Chewing Gums

1984 ◽  
Vol 49 (6) ◽  
pp. 1622-1623 ◽  
Author(s):  
MICHAEL J. GREENBERG ◽  
JOSEPH HOHOLICK ◽  
RICHARD ROBINSON ◽  
KATHRYN KUBIS ◽  
JAMES GRACE ◽  
...  
Keyword(s):  
Capillary Column ◽  
Fused Silica ◽  
Chewing Gums ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Silica Capillary

Gas Chromatographic Determination of Formaldehyde in Coffee Via Thiazolidine Derivative

1986 ◽  
Vol 69 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Tateki Hayashi ◽  
Clayton A Reece ◽  
Takayuki Shibamoto
Keyword(s):  
Capillary Column ◽  
Chromatographic Determination ◽  
Fused Silica ◽  
Gas Chromatograph ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Nitrogen Phosphorus ◽  
Specific Detector ◽  
Silica Capillary

Abstract Thiazolidine formed from trace quantities of formaldehyde in an aqueous solution containing cysteamine at pH 8 was extracted with chloroform and subsequently analyzed by a gas chromatograph equipped with a fused silica capillary column and a thermionic nitrogen-phosphorus specific detector. Recoveries of formaldehyde from the aqueous solutions at levels lower than 1 ppm were slightly over 100%. Quantitative analysis of formaldehyde in commercial brewed and instant coffees showed 3.4-4.5 ppm in the brewed and 10-16.3 ppm in the instant coffee.

Chemical Derivatization Analysis of Pesticide Residues. X. Analysis of Ten Acid Herbicides in Natural Waters

1986 ◽  
Vol 69 (3) ◽  
pp. 557-560
Author(s):  
Hing-Biu Lee ◽  
Yvonne D Stokker ◽  
Alfred S Y Chau
Keyword(s):  
Natural Waters ◽  
Capillary Column ◽  
Methylene Chloride ◽  
Fused Silica ◽  
Fused Silica Capillary ◽  
Pentafluorobenzyl Bromide ◽  
Acid Herbicides ◽  
Silica Capillary Column ◽  
Silica Capillary

Abstract An improved and augmented gas chromatographic (GC) method using a capillary column and electron capture detector was developed for determination of 10 common acid herbicides in natural water. The herbicides were extracted with methylene chloride after the water sample was acidified to pH < 1. Concentrated extracts in acetone were derivatized with pentafluorobenzyl bromide (PFBBr) to form the corresponding PFB esters. Derivatives were cleaned up on a deactivated silica gel column. A SE-54 fused silica capillary column was used to separate and identify the products. Using this procedure, the method was successfully validated for herbicide concentrations as low as 0.05 μg/L in natural waters. Recoveries of water samples fortified with the 10 herbicides ranging from 1.0 to 0.05 μg/L were 73 to 108% with the exception of picloram which was only 59% recovered at 0.1 μg/L.

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