Top 8 Marijuana Test Kits Compared on Accuracy and Cutoff Levels
Accuracy in rapid THC testing is mostly a question of cutoff. A device is not “more accurate” because a box says 99% — it is more or less likely to call a sample positive depending on the threshold it is calibrated to. Move from 50 ng/mL to 20 ng/mL and the same specimen can flip […]
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