1. Liquid milk exposure and risk assessment of thiocyanate in Chinese populations
Ling YONG ; Lei ZHANG ; Yibaina WANG ; Dajin YANG ; Zhaoping LIU ; Tao WANG ; Jingping HUANG ; Pingping ZHOU
Chinese Journal of Preventive Medicine 2017;51(4):332-335
Objective:
To analyze liquid milk exposure of thiocyanate among Chinese population and preliminarily assess its health risk.
Methods:
A total of 2 059 raw milk samples were collected during 2013 and 2014 from 12 Chinese provinces, New Zealand and Netherlands. Farms were chosed according to the main sources of dairy companies, the distribution of farms and the yield of milk. Content of thiocyanate were detected by ion chromatography. Liquid milk consumption data were taken from Chinese beverage and alcoholic beverage consumption survey in 18 cities or counties in 9 provinces, including 16 775 subjects older than 3. A simple distribution model was used to estimate the exposure of thiocyanate from liquid milk. The tolerable daily intake (TDI) of thiocyanate was made 0.08 mg·kg-1·d-1. Then the exposures of different age groups were compared with TDI.
Results:
Finally, 1 331 samples out of 2 059 were detected to contain thiocyanate. The detection rate was 65%. The average concentration of thiocyanate was 2.11 mg/kg, with a range of 0.10-16.20 mg/kg. The general population's consumption of thiocyanate by drinking liquid milk was 0.001 mg · kg-1 · d-1, which was lower than TDI. The