สารบัญ

7.2 FOREIGN MATTER

         Vegetable drugs should be free from moulds, insects and other animal contamination.

         Foreign matter is material consisting of any or all of the following:

         1. Foreign organs: matter coming from the source plant but not defined as the drug.

         2. Foreign elements: matter not coming from the source plant and of either vegetable or mineral origin.

Method

         Weigh 100 to 500 g of the substance being examined or the quantity specified in the monograph and spread it in a thin layer. Separate the foreign matter by hand as completely as possible, weigh it and calculate the percentage present.