The sample is combusted in O (Schoniger, 

 Helvetica chimica acta , 39 : 650, 1956), 

 and phosphorus is precipitated as quino- 

 line molybdophosphate and titrated. 



Cotte, J. and E. Kahane 



1950. The determination of choline as 

 trimethylamine . Bulletin. Societe 

 chimique de France, 639-648. Chem- 

 ical Abstracts, 45:1641e (1951)"! 

 The method consists of oxidation of cho- 

 line by KMnO- in the presence of Na2S405 

 and measurement of the formaldehyde for- 

 med. 



Courchaine, A. J., W. H. Miller, and 

 D. B. Stein, Jr. 



1959. Rapid semimicro procedure for 



_ estimating free and total cholesterol. 



Clinical Chemistry , 5: 609-614. 

 A modification of the method of Zlatkis, 

 Zak, and Boyle (Journal of Laboratory and 

 Clinical Medicine , 41: 486, 1953). Phos- 

 phoric acid is used as solvent for ferric 

 chloride, giving a stable color reagent. 

 The method compares well with methods 

 of Schoenheimer-Sperry (Journal of Biolog - 

 ical Chemistry, 106 : 745, 1934) and Abell, 

 et al (Journal of Biological Chemistry, 195: 

 357, 1952). 



Craig, B. M. and N. L. Murtz 



1958. The separation of saturated and 

 k unsaturated fatty acid esters by gas- 



^ liquid chromatography. Canadian Jour - 



nal of Chemistry, 36: 1297-1301. 

 Fatty acid methyl esters are separated 

 according to chain length on a silicone 

 grease column and according to chain length 

 and degree of unsaturation on a plasticizer 

 column using a firebrick support and helium 

 as the carrier gas. 



Crawford, N. 



1959. Determination of serum oCand /3 

 lipoprotein cholesterol. Clinica Chim- 



■ ica Acta, 4: 494-502 . Chemical Ab- 



stracts, 53: 20208h (1959). 

 Lipoproteins are separated by paper elec- 

 trophoresis and their cholesterol is estima- 

 ted using FeCl3. 



Cremer, H. D. 



1949. Tetrahydrofuran as extraction 

 agent for lipide determination in blood 

 ■^ and serum . KUnlsche Wochenschrift, 



# 27: 755, Chemical Abstracts , 44: 8986d 

 (1950). 



A method is described which is similar 

 to Bloor's method, but which uses hot tetra- 

 hydrofuran for extraction of blood or serum 

 lipids . The method gives higher values 

 than Bloor's method. 



Crombie, W. M. L., R. Comber, and 

 S. G. Boatman 



1955. The estimation of unsaturated 

 _. fatty acids by reversed-phase parti- 



tion chromatography. Biochemical 



# Journal , 59: 309-316. 



Unsaturated fatty acids were sefiarated on 

 paraffin -impregnated kieselguhr using ace- 

 tone-water mixtures for elution. Effects of 

 isomerism and functional groups on the rates 

 of elution are discussed. 



Davenport, J. B. 



1955. Column partition chromatography 

 ^ of the fatty hydroxamic acids. Chem- 



# istry and Industry (London) 705-706. 

 Fatty acid hydroxamates were separated 



on a cellulose column and identified by their 

 melting points . 



Dawson, R. M. C. 



1954. A note on the estimation of sphingo- 



myelin in nervous tissue . Biochemical 



Journal , %: 621-625. 

 Lower values for sphingomyelin were ob- 

 tained by the method of Schmidt, et al (Jour- 

 nal of Biological Chemistry, 166 : 505, 1946) 

 when the lipids in brain tissue were precip- 

 itated with trichloracetic acid prior to sol- 

 vent extraction. The cause is believed to be 

 the presence of phosphorus -containing ma- 

 terials which become insoluble in trichlor- 

 acetic acid after alkaline hydrolysis and are 

 therefore estimated as sphingomyelin. 



DeLorenzi, F. and R. Aldrovandi 



1952. Volumetric determination of phos- 

 phorous in phosphates, glycerophos- 

 ▲ phates, and lecithin with Complexon III. 



Farmaco, scienza e tecnlca (Pa via) 7: 



15 



