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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

One-step liquid-liquid extraction of cocaine from urine samples for gas chromatographic analysis.

An improved technique for cocaine extraction from urine samples for gas chromatographic (GC) analysis is described. Employing a simple liquid-liquid extraction (LLE) of cocaine with a mixture of ethyl ether:isopropanol (9:1) the method presents a mean recovery of 74.49%. Limit of detection (LOD) and limit of quantification (LOQ) were 5 and 20 ng/ml, respectively. The method is highly precise (coefficient of variation (CV) <8%) and linear from 20 to 2000 ng/ml. It can he applied to detect the presence of cocaine in urine as a marker of its recent use in drug abuse treatment protocols.[1]

References

  1. One-step liquid-liquid extraction of cocaine from urine samples for gas chromatographic analysis. Farina, M., Yonamine, M., Silva, O.A. Forensic Sci. Int. (2002) [Pubmed]
 
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