Our machine cannot always detect substances in the sample if they are only present at a very low trace level. Since fentanyl is so potent, it can still have powerful or deadly effects even at these trace levels.
We have a second test which we can use if we want to specifically detect for trace amounts of fentanyl. This is a test-strip system which produces a yes/no result for fentanyl.
To use the test-strip system we dissolve the sample in distilled water and use a small paper strip which changes color in the presence of any fentanyl.
The test strip can detect fentanyl and some analogues, but not all. It cannot differentiate between the fentanyl and fentanyl analogues.
We can do this test at no charge. This test destroys the sample.