Abstract
AbstractA method is described for the estimation of 3 u.v.‐absorbent mycotoxins in foods by using semi‐preparative and analytical h.p.l.c. columns. The foodstuff is extracted using aqueous acetonitrile and fatty matter is removed from the extract by partition into 2,2,4‐trimethylpentane. Mycotoxins present in the fat‐free extract are then back extracted into chloroform and separated into two fractions on a silica gel column using (a) diethyl ether and (b) chloroform: methanol. Further purification on a semi‐preparative alumina column is described prior to measurement of mycotoxin content on analytical h.p.l.c. columns. Recoveries of zearalenone, patulin and penicillic acid added at 2 to 4 times the detection limit to samples of meat, dairy products and cereals ranged from 50 to 100%.
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