Development of application protocols of the Emit® II Plus 6-Acetylmorphine Assay on the ADVIA® 1800 and 2400 Chemistry Systems
| Autor: | Gerald Siefring, Nihmat Morjana, Julie A. Warren |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Narcotics
Detection limit Morphine Derivatives Analyte Chromatography Urine screening Heroin Dependence Reproducibility of Results Repeatability Urine Pathology and Forensic Medicine Substance Abuse Detection Forensic Toxicology chemistry.chemical_compound chemistry Method comparison Limit of Detection Enzyme Multiplied Immunoassay Technique Application protocol Humans 6-Monoacetylmorphine Law |
| Zdroj: | Forensic Science International. 244:122-127 |
| ISSN: | 0379-0738 |
| DOI: | 10.1016/j.forsciint.2014.08.014 |
| Popis: | New application protocols for the Emit ® II Plus 6-Acetylmorphine Assay for human urine screening have been developed on the ADVIA ® 1800 and 2400 Chemistry Systems. Precision was evaluated at the cutoff and ±25% controls. Recovery and linearity were studied by spiking 6-acetylmorphine (6-AM) into human urine pools. Method comparison was evaluated using urine specimens and the results were compared to those obtained from the predicate Analyzer (V-Twin ® ). Cross-reactivity with structurally related drugs was assessed at high cross-reactant concentrations. Potential interferences were assessed in the presence of 7.5 and 12.5 ng/mL of 6-AM. The qualitative repeatability coefficients of variation (CV's) ranged from 0.40 to 0.90% and the within-lab CV's ranged from 1.3 to 3.5%. In analyte units (ng/mL), the repeatability CV's ranged from 1.9 to 4.3% and the within-lab CV's ranged from 3.7 to 6.1%. The limit of detection of the assay was found to be 2.5 ng/mL on both instruments. Recovery was within 20% of expected value. Linearity was 2.5–20 ng/mL. Method comparison showed 100% agreement with the predicate analyzer. The assay had minimal cross-reactivity to structurally related opioids including with morphine, morphine-3-glucuronide, morphine-6-glucuronide. No interference was observed with endogenous interferences. |
| Databáze: | OpenAIRE |
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