Quantitative Determination of Maleic Anhydride, Benzoic Acid, Naphthalene, and 1,4-Naphthoquinone in Phthalic Anhydride by Gas Liquid Chromatography.

1964 ◽  
Vol 36 (2) ◽  
pp. 269-271 ◽  
Author(s):  
Helen. Trachman ◽  
Frederick. Zucker
Keyword(s):  
Liquid Chromatography ◽  
Maleic Anhydride ◽  
Benzoic Acid ◽  
Quantitative Determination ◽  
Phthalic Anhydride ◽  
Gas Liquid Chromatography

Determination of Benzoic Acid in Phthalic Anhydride by Gas Liquid Chromatography.

1962 ◽  
Vol 34 (11) ◽  
pp. 1503-1504 ◽  
Author(s):  
C. E. Moore ◽  
Siegfried Meinstein
Keyword(s):  
Liquid Chromatography ◽  
Benzoic Acid ◽  
Phthalic Anhydride ◽  
Gas Liquid Chromatography

Quantitative Determination of Benzaldehyde in Flavors by Gas-Liquid Chromatography

1963 ◽  
Vol 46 (6) ◽  
pp. 950-951
Author(s):  
Richard L Brunelle ◽  
Glenn E Martin
Keyword(s):  
Liquid Chromatography ◽  
Liquid Phase ◽  
Benzoic Acid ◽  
Quantitative Determination ◽  
Solid Support ◽  
Specific Method ◽  
Gas Liquid Chromatography ◽  
Ultraviolet Spectrophotometry ◽  
Liquid Chromatography Separation

Abstract A rapid and specific method is given for determination of benzaldehyde in the presence of interfering substances by gas-liquid chromatography. Separation is effected on a ¼ column containing 2 5% Apiezon M as the liquid phase on a solid support of Chromoport XXX (60—80 mesh) at isothermal conditions, 100°C. The determination can be performed in the presence of benzoic acid and other interfering substances. Results are compared with those obtained by ultraviolet spectrophotometry on a variety of almond and cherry flavors.

DETERMINATION OF PLASMA OESTRIOL IN NORMAL PREGNANCY AND LABOUR USING GAS-LIQUID CHROMATOGRAPHY

1971 ◽  
Vol 51 (3) ◽  
pp. 447-454 ◽  
Author(s):  
W. COOPER ◽  
M. G. COYLE ◽  
J. A. MILLS
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Quantitative Determination ◽  
Internal Standard ◽  
Normal Pregnancy ◽  
Gas Liquid Chromatography ◽  
Chemical Purification ◽  
Peripheral Plasma ◽  
Pregnancy And Delivery

SUMMARY A method is described for estimating oestriol in 2–10 ml samples of human pregnancy peripheral plasma. It incorporates acid hydrolysis, chemical purification, methylation, chromatography on alumina columns, formation of a derivative and quantitative determination by gas chromatography. A radioactive internal standard was added to correct for procedural losses. Plasma oestriol determinations in five normal patients throughout pregnancy and delivery are reported.

Quantitative Determination of Sorbic Acid in Cheddar Cheese by Gas-Liquid Chromatography

1971 ◽  
Vol 54 (2) ◽  
pp. 361-363
Author(s):  
D E LaCroix ◽  
N P Wong
Keyword(s):  
Liquid Chromatography ◽  
Ethylene Glycol ◽  
Quantitative Determination ◽  
Sorbic Acid ◽  
Cheddar Cheese ◽  
Gas Liquid Chromatography ◽  
Glycol Adipate ◽  
Average Recovery ◽  
Ethylene Glycol Adipate

Abstract A rapid method is described for the extraction and quantitative determination of sorbic acid in Cheddar cheese. Cheddar cheese is impregnated onto a Celite 545 column, extracted with acetonitrile, and analyzed for sorbic acid by gas-liquid chromatography, using a 7.5% ethylene glycol adipate + 2% H3PO4 column. Average recovery values for known amounts of sorbic acid were 107%.

Rapid Method for Quantitative Determination of Propoxyphene in Serum by Gas-Liquid Chromatography

1973 ◽  
Vol 19 (5) ◽  
pp. 492-495 ◽  
Author(s):  
M A Evenson ◽  
Susan Koellner
Keyword(s):  
Liquid Chromatography ◽  
Quantitative Determination ◽  
Rapid Method ◽  
Coefficient Of Variation ◽  
Therapeutic Dose ◽  
Gas Liquid Chromatography ◽  
Healthy Controls ◽  
Serum Pool ◽  
Sedative Drugs

Abstract Rapid, accurate, and precise gas-chromatographic methods are reported for measurement of propoxyphene ("Darvon") in serum. A sample of 5 ml of serum is required for quantitation in blood after a therapeutic dose of 130-195 mg of propoxyphene; in cases of overdose of propoxyphene, only 1 ml of serum is required in a "toxic method" variation. Neither serum from healthy controls or from hospitalized patients contains interfering substances. Several commonly used analgesic and sedative drugs, added to a serum pool, also did not interfere. Day-to-day precision of the therapeutic method, as measured by the coefficient of variation (CV), is 7%; the CV for the method as applied to overdose cases is less than 3%. Propoxyphene added to serum could be about 86% accounted for analytically.

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