Simultaneous determination of propoxyphene and norpropoxyphene in biological samples by gas chromatography using an on-column injection technique with a fused-silica capillary column

1989 ◽  
Vol 491 ◽  
pp. 448-454 ◽  
Author(s):  
Hosang Shin ◽  
Dongseok Lho ◽  
Jongsei Park
Keyword(s):  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Biological Samples ◽  
Capillary Column ◽  
Fused Silica ◽  
Injection Technique ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Silica Capillary

Simultaneous Determination of D- and L-Malic Acids in Apple Juice by Gas Chromatography

1988 ◽  
Vol 71 (3) ◽  
pp. 466-468 ◽  
Author(s):  
Vipin K Agarwal
Keyword(s):  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Apple Juice ◽  
Capillary Column ◽  
Butyl Ester ◽  
Fused Silica ◽  
Fused Silica Capillary ◽  
Silica Capillary Column ◽  
Silica Capillary

Abstract A gas chromatographic (GC) method was developed for the simultaneous determination of D- and L-malic acids in apple juice. D-Malic- (R)-(-)-2-butyl ester and L-malic-(R)-(-)-2-butyl ester are prepared with (R)-(-)-2-butanol. These diastereomers are separated and quantitated by gas chromatography on a Carbowax 20M (30 m x 0.25 mm) fused silica capillary column. This procedure does not involve any extraction or cleanup step.

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