Cocaine contamination of United States paper currency

Jonathan Oyler, William D. Darwin, Edward J. Cone

Research output: Contribution to journalArticle

Abstract

The exchange of illicit cocaine for money by drug dealers is an everyday occurrence in cities in the United States. There is ample opportunity during the exchange, storage, and use of cocaine for paper currency to become contaminated. Because currency is exchanged frequently, it is likely that contaminated currency would be found in common use. We examined ten single dollar bills from several cities in the United States for the presence of cocaine. Individual bills were extracted with methanol (10 mL). Cocaine was purified from the methanol extract by solid-phase extraction (SPE). The SPE extract was analyzed by gas chromatography-mass spectrometry (GC-MS). Standard curves were constructed with new, uncirculated currency. Cocaine was identified qualitatively by full scan and quantitated by selected ion monitoring. Cocaine was present in 79% of the currency samples analyzed in amounts above 0.1 μg and in 54% of the currency in amounts above 1.0 μg. Contamination was widespread and was found in currency from all sites examined. Cocaine amounts were highly variable and ranged from nanogram to milligram amounts. The highest amount of cocaine detected on a single one- dollar bill was 1327 μg. These results indicated that cocaine contamination of currency is widespread throughout the United States and is likely to be primarily a result of cross-contamination from other contaminated currency and from contaminated money-counting machines.

Original languageEnglish (US)
Pages (from-to)213-216
Number of pages4
JournalJournal of Analytical Toxicology
Volume20
Issue number4
StatePublished - Jul 1996

Fingerprint

currency
Cocaine
Contamination
Methanol
Gas chromatography
Mass spectrometry
Solid Phase Extraction
methanol
Monitoring
Ions
contamination
Gas Chromatography-Mass Spectrometry
gas chromatography
drug
mass spectrometry
ion
monitoring

ASJC Scopus subject areas

  • Analytical Chemistry
  • Toxicology
  • Health, Toxicology and Mutagenesis

Cite this

Oyler, J., Darwin, W. D., & Cone, E. J. (1996). Cocaine contamination of United States paper currency. Journal of Analytical Toxicology, 20(4), 213-216.

Cocaine contamination of United States paper currency. / Oyler, Jonathan; Darwin, William D.; Cone, Edward J.

In: Journal of Analytical Toxicology, Vol. 20, No. 4, 07.1996, p. 213-216.

Research output: Contribution to journalArticle

Oyler, J, Darwin, WD & Cone, EJ 1996, 'Cocaine contamination of United States paper currency', Journal of Analytical Toxicology, vol. 20, no. 4, pp. 213-216.
Oyler, Jonathan ; Darwin, William D. ; Cone, Edward J. / Cocaine contamination of United States paper currency. In: Journal of Analytical Toxicology. 1996 ; Vol. 20, No. 4. pp. 213-216.
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