氰化物纸片快速测定食品中的氰化物

目的:建立食品中氰化物的纸片速测法并应用于重大活动保障中。方法:食品中的氰化物经水浸取后,与氯胺T反应生成氯化氰,继而与异烟酸反应,并经水解而成戊烯二醛,最后与1,3—二甲基巴比妥酸作用生成紫蓝色化合物,比色定量。结果:方法检出限为1.00 mg/kg,准确度和精密度都较为理想。结论:氰化物纸片速测法具有灵敏度高,快速,携带方便的特点,适合于重大活动保障中氰化物的快速测定。

Fast determination of cyanide by paper disk method

Objective:To establish a method for fast determination of cyanide in food by paper disk method in important Activities.Methods:Cyanide in food was leached with water,and then reacted with chloramine T to form cyanochloride which reacted with isonicotinic acid,the product was hydrolyed to glutaconaldehyde,and finally it reacted with 1,3-dimethyl barbituric acid to form a violet blue compound.The content of cyanide was quantitated colorimetrically.Results:The detection limit of the method was 1.00 mg/kg,the recoveries and the precision were satisfactory.Conclusion:The method was sensitive,fast and convenient.It is suitable to determine cyanide in food in important Activities.