Bacterial Endotoxin Testing: Representative Samples

[PANJABLION]

I am working in the pharmaceutical industry and currently is faced with a
Bacterial Endotoxin Test issue.  How do you get representative samples
from a batch of finished products once they have already been packaged and
ther are no segregation of beginning, middle and end of the batch?  If
anyone has any information, please e-mail me at panjablion at aol.com