UNEP DATABANK OF LABORATORIES ANALYZING PERSISTENT ORGANIC POLLUTANTS
"POPS LABORATORY DATABANK"

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4 Sampling According to Matrix: High Frequency (++), Low Frequency (+) 

Matrices of Interest GMP Matrices
Pesticides + DDT + HCB
The Laboratory ++ + ++ ++ + + + + ++ +
Other Laboratory
Client + + ++ +
Nurse / Physician + +
The lab. provides sampling equipment ++ + ++ ++ + + + + ++ +
The lab. specifies the sampling procedure ++ + ++ ++ + + + ++ ++ + + +
Other

* Proposed as a useful matrix by GMP Group (2010)