Type

Journal Article

Authors

Brett Paull
Mirek Macka
Jonathan Bones

Subjects

Microbiology

Topics
street drugs humans tandem mass spectrometry substance related disorders particle size equipment contamination chromatography liquid epidemiology cocaine related disorders cocaine commerce ireland

Evaluation of monolithic and sub 2 microm particle packed columns for the rapid screening for illicit drugs--application to the determination of drug contamination on Irish euro banknotes. (2007)

Abstract A study comparing recently available 100 x 3 mm id, 200 x 3 mm id monolithic reversed-phase columns with a 50 x 2.1 mm id, 1.8 microm particle packed reversed-phase columns was carried out to determine the most efficient approach (using traditional van Deemter analysis and a modern kinetic plot approach) for the rapid screening of samples for 16 illicit drugs and associated metabolites. A plot of column backpressure versus plate number (N) showed a significant advantage of using the monolithic phases, with the 20 cm monolithic column exhibiting a maximum 15,000 plates at a column backpressure of approximately 70 bar, compared to approximately 7000 plates at 150 bar for the 5 cm 1.8 microm particle packed column. Optimum linear velocities were found to be 0.40 mm s(-1), 0.52 mm s(-1) and 0.98 mm s(-1) for the three above columns, respectively. The 20 cm monolithic column was subsequently applied to the separation and determination of illicit drug contamination on Irish euro banknotes, using methanol extraction followed by LC-MS/MS. Method performance data showed that the new LC-MS/MS method was significantly more sensitive than previous GC-MS/MS based methods for this application, with detection limits in the pg note(-1) region, based upon a 20 microL standard injection. All of the notes examined tested positive for trace quantities of cocaine, with benzoylecgonine detected on 12 of the 45 notes sampled. Traces of heroin were also detected on three of the 45 notes.
Collections Ireland -> Dublin City University -> PubMed

Full list of authors on original publication

Brett Paull, Mirek Macka, Jonathan Bones

Experts in our system

1
Brett Paull
Dublin City University
Total Publications: 120
 
2
Mirek Macka
Dublin City University
Total Publications: 34
 
3
Jonathan Bones
University College Dublin
Total Publications: 28