Effect of open storage and peeling on the fluorine content of dried corn in Zhaotong city, Yunnan province, a fluorosis area
10.3760/cma.j.issn.1000-4955.2010.04.021
- VernacularTitle:云南省昭通市氟中毒病区烘干玉米敞口存放及脱皮对玉米含氟量的影响
- Author:
Hui-jie, LI
;
Kun-li, LUO
- Publication Type:Journal Article
- Keywords:
Fluorosis;
Coal;
Corn;
Food preservation
- From:Chinese Journal of Endemiology
2010;29(4):426-428
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effect of open storage and peeling on the fluorine content of dried com in order to provide a scientific basis for prevention and treatment of coal-combustion fluorosis. Methods In October 2006, 34 samples of freshly dried and 3-month old dried com were sampled in Zhenxiong county, Zhaotong city, Yunnan province. Fluorine content in corn was determined by combustion-hydrolysis-ion selective electrode method. Results The average fluorine content of freshly dried corn by coal-combustion was (4.29 ±1.87)mg/kg,and increased to (6.64±2.64)mg/kg after they had been openly stored for three months and the average content increased by 54.74%. But if corn was peeled off, their fluorine content decreased to (5.03±2.04)mg/kg at a rate of 24.25%. The amount of fluorine absorbed by the skin of corn was more than other parts of com during corn desiccation. Conclusions The inhabitants in coal-combustion fluorosis areas ingest less fluorine through dry com if they eat the peeled corn and take measures to keep it airtight and moisture-proof during storage thus reducing the harm of coal-combustion fluorosis.
