[Automation of fluorometric enzymatic determination of free and total cholesterol. Application to the determination of the esterification rate].

Abstract:

:A fluorimetric, authomatical method for determination of free and total cholesterol in serum is described. Cholesterol esters are splitted into free cholesterol and fatty acids by cholesterol esterase. In the presence of oxygen free cholesterol will be transformed by cholesterol oxydase in delta 4 cholestenone with formation of hydrogen peroxyde. Hydrogen peroxyde oxidizes in the presence of catalase inethanol to formaldehyde which gives with ammonium ions and acetylacetone 3-5 diacetyl 1-4 dihydrolutidine measured by fluorimetry. Withour cholesterol esterase, the reaction allows a measurement of free cholesterol in plasma. So the ratio of ester to total cholesterol is determined by the two steps. Accuracy and precision are very good. Results are well correlated with those obtained with reference methods.

journal_name

Ann Biol Clin (Paris)

authors

Fruchart JC,Tsumbu BB,Dewailly P,Sezille G,Jaillard J

subject

Has Abstract

pub_date

1975-01-01 00:00:00

pages

453-7

issue

6

eissn

0003-3898

issn

1950-6112

journal_volume

33

pub_type

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