[Investigation of concentration of microcystin in raw materials and finished products of spires health food].

ABSTRACT

In order to investigate the concentration of micromystin in raw materials and finished products of spires health food, we collected 33 water samples from water resources, 160 water samples from culturing pool, 86 samples of Spires slurry and 70 samples of powders of Spires raw materials from 7 Spires manufacturers in Jiangsu, Yunnan, Fujian and Guandong provinces which are the main spires producing areas from July to August 2002. At the same time, we also collected 71 samples of 19 finished products of Spires health foods in markets of above-mentioned 4 provinces. Microcystin were tested for all samples by ELISA. The results show microcystin were not detected in 12 tap water samples, were detected in 6 of 9 under water samples, 8 of 12 surface water samples; microcystin concentration of water samples from culturing pool was 207.9 pg/ml and Spires slurry was 31.9 ng/g, the former is 153 times as the latter; powder of Spires raw material was 206.4 ng/g. The average concentration of microcystin of all Spires health food samples from market was 317.2 ng/g, there into, microcystin was 142.7 ng/g in a tables and 222.6 ng/g in capsule, respectively. The results suggested we shouldn't ignore the risk of exposuring microcystin when consuming Spires health food, it is necessary to further study and set a standard of limited microcystin in Spires health food.