| 摘要 |
They consist in tipping the granular product to be examined onto a vibrating tray 3 with a sloping base, said vibrating tray 3 being contained inside a dark chamber (camera obscura) 4, and ultraviolet light 5 is projected onto said tray. The grain contained in a hopper 1 falls into the highest part of the vibrating tray 3 and begins to jump as it advances towards the opposite edge, where it falls into the containing receptacle 11. Owing to the fact that spores of aspergillus flavus which generate aflatoxins are fluorescent when illuminated by ultraviolet lamp, the operator observing the run through a visor 6 provided in the wall of the dark chamber 4 is easily able to count the number of grains affected. <IMAGE>
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