Abstract：
:Cocaine is one of the most worldwide used illicit drugs. We report a magnetic particles-based enzyme-linked immunoassay (mpEIA) method for the rapid and sensitive determination of cocaine (COC) in saliva, urine and serum samples. Under optimized conditions, the limits of detections were 0.09ngmL(-1) (urine), 0.15ngmL(-1) (saliva), and 0.06ngmL(-1) COC (human serum). Sensitivities were in the range EC50=0.6-2.5ngmL(-1) COC. The cross-reactivity with the principal metabolite benzoylecgonine (BZE) was only 1.6%. Recovering percentages of doped samples (0, 10, 50, and 100ngmL(-1) of COC) ranged from about 86-111%. Some advantages of the developed mpEIA over conventional ELISA kits are faster incubations, improved reproducibility, and consumption of lower amounts of antibody and enzyme conjugates due to the use of magnetic beads. The reported method was validated following the guidelines on bioanalytical methods of the European Medicines Agency (2011). Unmetabolized COC detection has a great interest in pharmacological, pharmacokinetics, and toxicokinetics studies, and can be used to detect a very recent COC use (1-6h).
journal_name
J Pharm Biomed Analjournal_title
Journal of pharmaceutical and biomedical analysisauthors
Vidal JC,Bertolín JR,Bonel L,Asturias L,Arcos-Martínez MJ,Castillo JRdoi
10.1016/j.jpba.2016.03.004subject
Has Abstractpub_date
2016-06-05 00:00:00pages
54-61eissn
0731-7085issn
1873-264Xpii
S0731-7085(16)30122-4journal_volume
125pub_type
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