Research Article
Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry
Table 1
The results of precision, accuracy, and recovery studies for morphine and codeine in human urine
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| Compound | Concentration | RSD (%) | RE (%) | Recovery (%) | (ng/mL) | Intraday | Interday | Intraday | Interday |
| Morphine | 50 | 4.3 | 8.2 | −0.3 | −6.5 | 86.1 | 200 | 4.4 | 7.4 | −5.2 | −10.1 | 75.5 | 1600 | 5.3 | 9.3 | −6.9 | 5.7 | 80.2 |
| Codeine | 50 | 10.5 | 13.0 | 8.5 | −7.3 | 78.9 | 200 | 11.4 | 9.8 | −3.9 | −12.8 | 79.7 | 1600 | 5.2 | 12.9 | −9.9 | −8.2 | 86.8 |
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