Amphetamine and Related Drugs

Sampling and Physical Description of
Amphetamines
Powder Samples
If the samples are powdered materials, they should be sorted
into groups, where the members of the groups cannot be
distinguished from each other. Having achieved this, the items
in each group should be counted and a good physical
description prepared. This should include weight, color, odor
and any other physical characteristic that the scientist
considers to be important. Depending upon the number of
items in the group, the following sampling strategy, based
upon the United Nations Drug Control Program (UNDCP)
recommendations, may be adopted. If there are between 1 and
10 items, all of them should be examined. If there are between
10 and 100 items, then 10 items should be examined, while if
there are more than 100 items, the square route of the number
of items should be examined
4/27/2009 ٥٩