Intentional contamination with soap, salt, vinegar, etc. will interfere with the assay, and dilution with water will tend to produce negative results, so the urine collection should be supervised wherever possible.
The urine “cocaine metabolite” assay currently in use will produce positive results with the following compounds at or above the concentrations indicated:
|Benzoylecgonine (cocaine metabolite)
|Ecgonine (cocaine metabolite)
Can be added on to an existing request up to 4 days following sample receiptSpecimen Labelling Procedure