Simultaneous determination of trace benzodiazepines from drinks by using direct electrospray probe/mass spectrometry (DEP/MS). 
This study presents a novel means of rapidly determining benzodiazepines in various drinks.  Electrospray mass spectrometry with a direct probe design is used as the analytical instrument.  Samples are treated only by a simple liquid-liquid extraction prior to direct electrospray probe/mass spectrometry (DEP/MS) analysis.  The proposed method provides a relatively easy and efficient means of identifying the drugs in a very short time interval.  On average, sample analysis is completed in less than five minutes including sample pretreatment.  It is especially useful in forensic science since the technology can provide a rapid identification for unknown samples.  Thus, the method proposed herein is highly appropriate for rapidly screening a large number of samples.