title: Validation of the Cozart microplate EIA for cocaine and metabolites in oral fluid.
abstract: The purpose of these studies was to determine the performance characteristics of the Cozart microplate EIA for the detection of cocaine and cocaine metabolites in oral fluid. A total of 217 samples were collected using the Cozart RapiScan oral fluid Collection System from donors who were receiving treatment and being monitored for their addiction. The samples were screened in the laboratory using the Cozart microplate EIA for cocaine and metabolites and confirmed using gas chromatography-mass spectrometry (GC-MS). The samples were stored frozen until analysis by GC-MS. Of the 217 samples tested, 116 were positive for cocaine and/or cocaine metabolites. The Cozart microplate EIA for cocaine, using a cutoff of 30 ng/mL benzoylecgonine equivalents in neat oral fluid, had a sensitivity of 95.7% +/- 2.0% and specificity of 100% +/- 0.7%. A series of potential adulterants of oral fluid were evaluated and shown not to alter the outcome of the test result.
authors.affiliation: Cozart plc, Abingdon, Oxfordshire, OK 14 4RU, UK. cooper@cozart.co.uk
authors.forename: Gail
authors.initials: G
authors.lastname: Cooper
authors.forename: Lisa
authors.initials: L
authors.lastname: Wilson
authors.forename: Claire
authors.initials: C
authors.lastname: Reid
authors.forename: Dene
authors.initials: D
authors.lastname: Baldwin
authors.forename: Chris
authors.initials: C
authors.lastname: Hand
authors.forename: Vina
authors.initials: V
authors.lastname: Spieher
mesh_terms: D000465:Algorithms; D000918:Antibody Specificity; D003042:Cocaine / Q000032:analysis*; D019970:Cocaine-Related Disorders / Q000175:diagnosis*; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D005188:False Negative Reactions; D005189:False Positive Reactions; D005502:Food; D008401:Gas Chromatography-Mass Spectrometry; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D007124:Immunoenzyme Techniques; D008691:Methadone / Q000627:therapeutic use; D009294:Narcotics / Q000627:therapeutic use; D009293:Opioid-Related Disorders / Q000534:rehabilitation; D015203:Reproducibility of Results; D012463:Saliva / Q000737:chemistry*; D012907:Smoking / Q000378:metabolism; D015813:Substance Abuse Detection / Q000295:instrumentation / Q000379:methods*
chemical_list: D006454:Hemoglobins; D009294:Narcotics; D003042:Cocaine; D008691:Methadone