Note on Determination of Free Succinic Acid in Eggs by Gas-Liquid Chromatography

1970 ◽  
Vol 53 (3) ◽  
pp. 468-470
Author(s):  
Sammie Bethea
Keyword(s):  
Liquid Chromatography ◽  
Succinic Acid ◽  
Retention Time ◽  
Flame Ionization Detector ◽  
Gas Liquid Chromatography ◽  
Ionization Detector ◽  
Flame Ionization

Abstract Free succinic acid can be determined in eggs by gas-liquid chromatography, using a flame ionization detector, after prior extraction of the acid from the sample by ether. Decomposed or incubator reject eggs all exhibited sample peaks with the same retention time as succinic acid, while undecomposed eggs showed no peaks.

Determination of Phenothiazine and Several of its Derivatives by Gas-Liquid Chromatography

1966 ◽  
Vol 49 (4) ◽  
pp. 857-859
Author(s):  
C L Bramlett
Keyword(s):  
Liquid Chromatography ◽  
Internal Standard ◽  
Flame Ionization Detector ◽  
Gas Liquid Chromatography ◽  
Chromatographic Technique ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Hydrogen Flame

Abstract Phenothiazine, promethazine.HCl, chlorpromazine. HCl, promazine.HCl, and levomepromazine. HCl were chromatographed satisfactorily on a column containing 5% Apiezon L coated on Anakrom ABS, 100/110 mesh, using a hydrogen-flame ionization detector. This gas chromatographic technique is rapid and more specific than existing official methods. The use of an internal standard to improve precision will be investigated.

Determination of Vanillin and Ethyl Vanillin by Gas-Liquid Chromatography

1964 ◽  
Vol 47 (3) ◽  
pp. 561-562 ◽  
Author(s):  
Glenn E Marten ◽  
Frank J Feeny ◽  
Frank P Scaringelli
Keyword(s):  
Liquid Chromatography ◽  
Rapid Method ◽  
Internal Standard ◽  
Flame Ionization Detector ◽  
Gas Liquid Chromatography ◽  
Ionization Detector ◽  
Ethyl Vanillin ◽  
Flame Ionization ◽  
Other Substances

Abstract A rapid method has been developed in which gas-liquid chromatography is used to separate vanillin and ethyl vanillin in vanilla samples and determine them quantitatively. A flame ionization detector is used for the vanillin determination. 2-Phenoxyethanol is used as internal standard. The presence of any other substances is eliminated.

Determination of Saccharin in Biological Materials by Gas-Liquid Chromatography

1971 ◽  
Vol 54 (5) ◽  
pp. 1140-1145
Author(s):  
Robert J Daun
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Quantitative Determination ◽  
Methyl Iodide ◽  
Chromatographic Separation ◽  
Gas Liquid Chromatography ◽  
Ionization Detector ◽  
Animal Tissues ◽  
Flame Ionization

Abstract A method is described for the quantitative determination of saccharin in urine, feces, blood, and animal tissues. The saccharin is extracted with diethyl ether and methylated with methyl iodide to provide a volatile derivative for gas-liquid chromatography. Higher levels, as found in urine and feces, are determined with a flame ionization detector and lower levels, as in blood and tissues, are analyzed with an electron capture detector after a thin layer chromatographic separation.

GLC of Sorbitol in Bakery Products, Wines, and Vinegars. Bv Harvey K. Hundley

1968 ◽  
Vol 51 (6) ◽  
pp. 1272-1274
Author(s):  
Harvey K Hundley
Keyword(s):  
Liquid Chromatography ◽  
Flame Ionization Detector ◽  
Gas Liquid Chromatography ◽  
Bakery Products ◽  
Ionization Detector ◽  
Sugar Alcohols ◽  
Flame Ionization

Abstract Sorbitol is extracted from bakery products with methanol. Aliquots of wines and vinegars are taken directly. Sugars and sugar alcohols are acetylated, then extracted with chloroform. The acetates are determined by gas-liquid chromatography with a flame ionization detector.

D-Mannose in human serum, measured as its aldononitrile acetate derivative.

1979 ◽  
Vol 25 (8) ◽  
pp. 1384-1387 ◽  
Author(s):  
T P Monson ◽  
K P Wilkinson
Keyword(s):  
Liquid Chromatography ◽  
Human Serum ◽  
Flame Ionization Detector ◽  
Candida Infection ◽  
Gas Liquid Chromatography ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Invasive Candida Infection ◽  
Acetate Derivative

Abstract We report a procedure for determining D-mannose in serum. After removal of proteins and lipids, the carbohydrate-containing fraction is treated to form the aldononitrile acetate derivative and analyzed by gas--liquid chromatography with a flame-ionization detector. D-Mannose and D-glucose had retention times of 31 and 34 min, respectively. Day-to-day reproducibilities (CV) of between 2 and 12% for mannose were attainable for quantities of 100--900 ng. Related hexoses and derivatives do not interfere. The sensitivity was such that 10 mg/L could be detected in a 0.1-mL sample of serum. This method may be of use in diagnosing invasive Candida infection.

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