Comparison of spectrodensitometric and colorimetric methods for quantifying starch hydrolysis products separated by thin-layer chromatography

1976 ◽  
Vol 129 ◽  
pp. 415-419 ◽  
Author(s):  
R.L. Conway ◽  
L.F. Hood
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Starch Hydrolysis ◽  
Hydrolysis Products ◽  
Layer Chromatography ◽  
Colorimetric Methods

Application of Thin-Layer Chromatography to the Quantitative Estimation of Antioxidants: BHA, BHT, PG, and NDGA

1964 ◽  
Vol 47 (5) ◽  
pp. 888-893 ◽  
Author(s):  
Madhu R Sahasrabudhe
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Ethyl Alcohol ◽  
Quantitative Estimation ◽  
Two Dimensional ◽  
Suction Tube ◽  
Tube Assembly ◽  
Layer Chromatography ◽  
Colorimetric Methods

Abstract A procedure is described for the quantitative estimation of BHA, BHT, PG, and NDGA in lard. The antioxidants are extracted from n-hexane solutions of the fat with 80% ethyl alcohol and acetonitrile, separated by two-dimensional thin-layer chromatography using benzene and acetonitrile, and estimated quantitatively by colorimetric methods after extraction of the spots. A special flask for concentration and a suction tube assembly for spot pickup are described. Recoveries of the antioxidants from lard were in the following ranges: BHA, 98-101%; BHT, 96-101%; PG, 90-101%; NDGA, 82-98%. The advantages of the method over others in use are that (I) all four antioxidants can be estimated in one aliquot of fat, (2) PG and NDGA can be estimated when present together in mixtures, and (3) the isomers of BHA can be effectively separated.

PHOSPHOLIPID COMPONENTS EXTRACTED FROM SASKATCHEWAN SOILS

1971 ◽  
Vol 51 (1) ◽  
pp. 19-22 ◽  
Author(s):  
C. G. KOWALENKO ◽  
R. B. McKERCHER
Keyword(s):  
Fatty Acid ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Phosphatidyl Choline ◽  
Phosphatidyl Ethanolamine ◽  
Total Phospholipid ◽  
Plant Residues ◽  
Hydrolysis Products ◽  
Layer Chromatography ◽  
Choline Phosphatidyl

Soil phospholipids and their hydrolysis products, examined by thin-layer chromatography and selective sprays, revealed two major components, phosphatidyl ethanolamine and phosphatidyl choline. Phosphatidyl choline represented about 40% of the total phospholipid P and phosphatidyl ethanolamine about 30%. Small quantities of lyso-phosphatidyl choline were isolated from one soil. It is suggested that a study of the fatty acid constituents of phospholipids may indicate whether their source is largely from microorganisms or plant residues.

Separation of novocaine and its hydrolysis products by thin-layer chromatography

1976 ◽  
Vol 10 (2) ◽  
pp. 267-268
Author(s):  
M. Ya. Pormale ◽  
I. N. Rozental ◽  
N. A. Kashkina
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Hydrolysis Products ◽  
Layer Chromatography
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