@article {McCooeye:March 2001:0146-4760:81,
	author = "McCooeye M.A.",
	author = "Ells B.",
	author = "Barnett D.A.",
	author = "Purves R.W.",
	author = "Guevremont R.",
	title = "Quantitation of Morphine and Codeine in Human Urine using High-Field Asymmetric Waveform Ion Mobility Spectrometry (FAIMS) with Mass Spectrometric Detection",
	journal = "Journal of Analytical Toxicology",
	volume = "25",
	year = "March 2001",
	abstract = "<P>Morphine and codeine have been identified and measured in a human urine matrix using high-field asymmetric waveform ion mobility spectrometry (FAIMS) in a tandem combination with electrospray ionization (ESI) and mass spectrometric (MS) detection. The addition of helium to the nitrogen carrier gas resulted in a substantial improvement in the sensitivity of the ESI-FAIMS-MS instrument for the determination of morphine and codeine. Limits of detection in human urine were 60 ng/mL for morphine and 20 ng/mL for codeine with no clean-up, derivatization, or chromatographic separation of the sample prior to analysis.</P>",
	pages = "81-87(7)",
	url = "http://www.ingentaconnect.com/content/pres/jat/2001/00000025/00000002/art00002"
}