Plus if this untrained tech WAS to misinterpret a faint line as a non-negative and sent the sample for GC/MS confirmation, wouldn't the GC/MS quantitative analysis show some detection even if below the 50ng level since they are testing below that level?
drvrcrzy Reviewed by drvrcrzy on . Different test different results I have used several brands of THC strip tests. On one recent batch the second line is very faint even when testing a known negative and even tap water while another brand test used at the same time has a nice bold line. The test with the very faint line seems to be very sensitive to even the slightest amount of THC. After getting repeated negative results, then taking as little as one or tow puffs - the line becomes almost invisible. At the same time the other brand shows a clear second line. Rating: 5