Accuracy
A three way side-by-side comparison was conducted using the
THC One Step
Marijuana Test Strip and a leading commercially available
THC rapid test.
Testing was performed on
specimens previously collected from subjects
presenting for Drug Screen Testing. Presumptive positive results were confirmed
by GC/MS. The following results were tabulated:
| Method |
Other THC Rapid Test |
Total
Results |
THC One
Step
Test Strip |
Results |
Positive |
Negative |
| Positive |
140 |
0 |
140 |
| Negative |
3 |
157 |
160 |
| Total Results |
143 |
157 |
300 |
Total Agreement: 99%
Analytical Sensitivity
A
drug-free urine pool was spiked with 11-nor-Δ9-Tetrahytrocannabinol-9-
carboxylic acid at the following concentrations: 75 ng/ml, 62.5 ng/ml, 37.5 ng/ml, 25
ng/ml, and 0 ng/ml. The result demonstrates 100% accuracy at 50% above and 50%
below the cut-off concentration. The data are summarized below:
THC Concentration
(ng/mL)
| Percent of
Cutoff
| n
| Visual Result
|
| Negative
| Positive
|
| 0 |
0 |
30 |
30 |
0 |
| 25 |
50% |
30 |
30 |
0 |
| 37.5 |
75% |
30 |
12 |
18 |
| 50 |
Cutoff |
30 |
1 |
29 |
| 62.5 |
125% |
30 |
1 |
29 |
| 75 |
150% |
30 |
0 |
30 |
The following table lists compounds and their respective
concentrations in urine that
yield a
positive result in the
THC One Step Marijuana Test Strip at 5 minutes.
| Compound
| Concentration (ng/mL)
|
| Cannabinol |
20000 |
| 11-nor-Δ8 - THC-9 COOH |
30 |
| 11-nor-Δ9 -THC-9 COOH |
50 |
| Δ8 -THC |
15000 |
| Δ9 -THC |
15000 |
