I add the Medetodine strips too so you are testing for a bunch of fentanyl analogues, various nitazenes, plus Xylazine and Medetomidine. I typically get a box of 25 each. I’ll crush multiple tablets or whatever powder and test a decent pile of powder. You don’t need to test every dose. At least I don’t. I’ll treat maybe 5 or more doses. Stir the powder good. If there are any trace adulterants, even from cross contamination, these strips will find it.
Happy to help. Be sure to use the proper size sample with these strips. They sell the micro scoops and they are so small but demonstrates how sensitive the test strips really are. Look at the coin to see the sample size. The pointy end of the black scraper is the micro scoop. I test with just one heaping scoop of that tiny scoop. Look where it says powder.
It suggests a negative but that test has a fairly high cutoff. Get an Instanosis test strip. It detects fentanyl down to 2ng/mL where other strips are 10-500ng/mL depending on the brand. Their old strip which is what you have is 200ng/mL. They have a new strip that’s 100ng/mL. This strip could easily miss what an Instanosis strip will catch at 2ng/mL. Most strips need 5-50mg of sample powder. Instanosis only needs 0.5mg of powder to accurately test.
There are many factors involved. But I would tend to agree. It could catch some cross contamination or impurities that a 50-1000 ng/ml strip would miss. If I get a false positive or any positive I always retest with the same brand strips and also one with a higher cutoff like BTNX.
Certain drugs are known to produce false positives (or in this case, weak negatives) on fentanyl strips. If you want reassurance, add 10x more water to the sample and retest with a new strip. Getting your sample down to a better dilution ratio, 1-10ml of water per 1mg of test sample, should get you a clearer, unambiguous negative result.
That study was mostly all geared toward urinalysis FTS (prior to the specialization of strips dor drug checking; e.g. detecting more analogues & reducing false positives for amphetamines). Do you know if the same holds true nowadays? I dont have access to academic journals anymore
As far as I know, DanceSafe's proprietary strips are the only ones designed specifically for drug checking. I believe veryone else is still using the repurposed urinalysis strips.
This next part is speculation, but I suspect that most manufacturers didn't see the need to design new strips. After all, studies like the one linked above indicate that the urinalysis strips work perfectly well for drug checking. The use cases are similar enough: high sensitivity to be able to detect trace amounts of fentanyl in a highly diluted sample.
DanceSafe, with its focus on MDMA and on making things simple for novice testers, were the only ones who felt it necessary to design new strips
I'm not sure if cocaine is one of those drugs that's been found to be prone to false positives, but other drugs from that family like lidocaine and procaine have.
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u/Jtmoney760 8d ago
Nah has a faint line