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Fig. 9.
Specificity and accuracy of DDT 5000 obtained in the DRUID project in Belgium_
| Substance | Belgium | |
|---|---|---|
| Specificity [%] | Accuracy [%] | |
| Cocaine | 96 | 93 |
| Opioids | 87 | 89 |
| Benzodiazepines | 99 | 99 |
| Cannabis | 99 | 91 |
| Amphetamine | 100 | 99 |
| Methamphetamine | 100 | 100 |
Parameters of analytical method_
| Parameter | Value |
|---|---|
| Initial temperature | 80 °C |
| Initial hold time | 15 min |
| Ramp | 10 °C/min |
| Final temperature | 200 °C |
| Final hold time | 180 min |
| Carrier gas flow | 1.0 ml/s |
| Injection | 2 µl |
| Column | HP-5ms; 30 m; 0.32 mm; 25 µm |
Uncertainty contributions from the calibration and characteristics of the balance for the starting standard_
| Parameter | Uncertainty | Unit |
|---|---|---|
| Calibration | 0.65∙10−3 | g |
| Drift | 0.20∙10−3 | g |
| Resolution | 0.17∙10−3 | g |
| umi | 0.70∙10−4 | g |
Calculated values of uncertainties and the corresponding sensitivity coefficients_
| Parameter | Uncertainty | Unit | Sensitivity coefficient | Unit |
|---|---|---|---|---|
| umi | 0.70∙10−4 | g | 2.00∙10−3 | ml−1 |
| umsol | 2.43∙10−3 | g | 1.56∙10−7 | ml−1 |
| uρw | 9.00∙10−7 | g/ml | 7.77∙10−5 | - |
| uB | 1.40∙10−7 | g/ml | - | - |
| uBr | 1.44∙10−7 | % | - | - |
Uncertainty contributions from the calibration and characteristics of the balance for the solvent_
| Parameter | Uncertainty | Unit |
|---|---|---|
| Calibration | 0.85∙10−3 | g |
| Drift | 2.20∙10−3 | g |
| Resolution | 0.58∙10−3 | g |
| umsol | 2.43∙10−3 | g |
Detection limits estimated by the manufacturer_
| Substance | Detection limits [ng/ml] |
|---|---|
| Amphetamine | 50 |
| Benzodiazepines | 15 |
| Cocaine | 20 |
| Methamphetamine | 35 |
| Methadone | 20 |
| Ketamine | 300 |
| Opiates | 20 |
| THC | 5/10/25* |
Specificity and accuracy of DDT 5000 obtained in the DRUID project in the Netherlands_
| Substance | Netherlands | |
|---|---|---|
| Specificity [%] | Accuracy [%] | |
| Cocaine | 97 | 95 |
| Opioids | 100 | 100 |
| Benzodiazepines | 90 | 84 |
| Cannabis | 100 | 100 |
| Amphetamine | 100 | 98 |
| Methamphetamine | 100 | 100 |