An improved method for the quantitative determination of carboxymethyl cellulose in food products

1999 ◽  
Vol 13 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Murat Zorba ◽  
Gülden Ova
Keyword(s):  
Quantitative Determination ◽  
Carboxymethyl Cellulose ◽  
Food Products ◽  
Improved Method

Improved Method for Determination of Polynuclear Aromatic Hydrocarbons in Pharmacopoeial Paraffin and Mineral Oils

1991 ◽  
Vol 74 (6) ◽  
pp. 968-973
Author(s):  
Aziz Geahchan ◽  
I Le Gren ◽  
Paul Chambon ◽  
Renee Chambon
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
Quantitative Determination ◽  
Aromatic Hydrocarbons ◽  
Detectable Level ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Improved Method ◽  
Fluorometric Determination ◽  
Mineral Oils

Abstract An improved method has been developed for quantitative determination of poiynuciear aromatic hydrocarbons (PAHs) in pharmacopoeial paraffin and medicinal white oil samples. This new method combines 2 liquid-liquid partition and adsorption chromatography procedures with a 2-step purification on Sephadex LH 20 and liquid chromatography with fluorometric determination. Selective elution of PAHs results in absence of background fluorescence. The minimum detectable level ranges from 0.2 ppt for benzofluoranthene isomers to 200 ppt for acenaphthene. Recoveries of PAHs added at 7 ppm varied from 92.1 to 111.4%. When a variety of medicinal white oil samples were analyzed by this improved method, 27 PAHs were identified, including 11 suspected carcinogens. Their identities were confirmed by capillary gas chromatography.

Quantitative Determination of Coumestrol in Dried Alfalfa and Alfalfa Leaf Protein Concentrates Containing Chlorophyll

1975 ◽  
Vol 58 (5) ◽  
pp. 983-986
Author(s):  
Benny E Knuckles ◽  
Raymond E Miller ◽  
E M Bickoff
Keyword(s):  
Quantitative Determination ◽  
Analytical Method ◽  
Leaf Protein ◽  
Improved Method ◽  
Alcohol Extract ◽  
Protein Concentrates ◽  
Coefficients Of Variation ◽  
Lower Standard ◽  
Alfalfa Leaf

Abstract An improved analytical method for the determination of coumestrol in dried alfalfa and leaf protein concentrates is described. In this method, chlorophyll is removed from an alcohol extract prior to the paper chromatographic-fluorometric measurement of coumestrol. Ninety-eight per cent of the coumestrol added to alfalfa leaf protein concentrates is recovered by this method. This improved method gives replicate values with lower standard deviations and coefficients of variation than the literature method.

An Improved Method of Stature Measurement for Quantitative Determination of Spinal Loading

Spine ◽  
1992 ◽  
Vol 17 (6) ◽  
pp. 682-693 ◽  
Author(s):  
I. Althoff ◽  
P. Brinckmann ◽  
W. Frobin ◽  
J. Sandover ◽  
K. Burton
Keyword(s):  
Quantitative Determination ◽  
Improved Method ◽  
Spinal Loading

An improved method for quantitative determination of human fetal hemoglobin

1970 ◽  
Vol 35 (1) ◽  
pp. 235-243 ◽  
Author(s):  
W.A. Schroeder ◽  
T.H.J. Huisman ◽  
J. Roger Shelton ◽  
Jerry B. Wilson
Keyword(s):  
Quantitative Determination ◽  
Fetal Hemoglobin ◽  
Improved Method
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