[Influence of methyl esterification on the ultraviolet absorption of gamma-linolenic acid].
OBJECTIVE
To study the influence of methyl esterification on the ultraviolet absorption of gamma-linolenic acid.


METHODS
To measure the ultraviolet absorption value of some gamma-linolenic acid product by Ultraviolet Spectrophotometry before and after methyl esterification and to measure the fatty acids formation with gas chromatographic method. Then to do a correlation analysis of the results.


RESULTS
The ultraviolet absorption value of gamma-linolenic acid before methyl esterification was very significantly correlated with that after methyl esterification.


CONCLUSIONS
It is feasible to mesure the ultraviolet absorption value of polyunsaturated fatty acids (such as gamma-linolenic acid) without methyl esterification.
Guo
Shu-xian
SX
School of Biochemical Engineering, Nanyang Institute of Technology, Nanyang 473004, China. guoshux@163.com
Wang
Dong-mei
DM
Liu
Feng-xia
FX
Xue
Gang
G
Wang
Ying
Y
Feng
Jian-bo
JB
D000042:Absorption / Q000528:radiation effects; D002849:Chromatography, Gas; D004951:Esterification; D008745:Methylation; D031665:Oenothera biennis / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D014466:Ultraviolet Rays; D014508:Urea / Q000737:chemistry; D017965:gamma-Linolenic Acid / Q000032:analysis / Q000737:chemistry*
D017965:gamma-Linolenic Acid; D014508:Urea