[Decoloring and spectral properties analysis of innoxious ultraviolet absorbents].
Guang Pu Xue Yu Guang Pu Fen Xi
; 26(7): 1303-5, 2006 Jul.
Article
in Zh
| MEDLINE
| ID: mdl-17020045
ABSTRACT
The ultraviolet absorbent extracted from mango leaves, was discolored by some decoloring agent. Then the spectral properties of the discolored ultraviolet absorbents were analyzed. The discolored method of ultraviolet absorbent was studied by comparing one with the others. The results showed that the discoloring effect was satisfactory by using active carbon, H2O2, citric acid, and oxalic acid as decoloring agent. Specially, when oxalic acid was used as decoloring agent, the color of the production was slight, the rate of production was high, and the absorption effect of ultraviolet ray was well. When the concentration of the ultraviolet absorbent solution is 0.5% (w/w), the ultraviolet ray transmission was smaller than 0.3% in 200-370 nm, and it increased slightly from 370 nm. There was a maximum value at 400 nm, approaching 12%.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Spectrum Analysis
/
Ultraviolet Rays
/
Plant Extracts
/
Mangifera
Language:
Zh
Journal:
Guang Pu Xue Yu Guang Pu Fen Xi
Year:
2006
Type:
Article
Affiliation country:
China