Douglas W. Later, Edgar D. Lee, Joseph L. Oliphant, and Christopher R. Bowerbank Torion® Technologies Inc.
The CUSTODION™ SPME Syringes are a series of novel solid phase micro extraction syringes that incorporate Supelco Analytical's® (Bellefonte, Pennsylvania) SPME fiber technology. The SPME syringes are fabricated with injection-molded components and the device resembles a ball-point pen. The Supelco Analytical® SPME fiber assembly is housed inside the syringe.
A divinylbenzene/polydimethylsiloxane (DVB/PDMS, 65 μm df) SPME phase was exposed to the headspace above drinking water samples for replicate 1 min intervals following sample agitation between each sampling, for a total of 5 min sampling time. Concentrations of 10, 20, 100, and 500 ppb for each of the four trihalomethanes (THMs) were tested in this manner with freshly prepared standards from a 2000 ppm stock solution. The analysis was performed on a GUARDION™ -7 GC–TMS system.
The CUSTODION SPME syringes provide a quick, easy, and reliable technique for sample collection and preparation. The trigger button activation of the SPME holder allows for single handed operation during sampling and analysis. The EPA drinking water standard is 80 ppb total cumulative concentration for the four THMs. At detection levels for the individual THMs of ~10 ppb, as shown here, this method can be easily used to determine compliance of drinking water samples in the field at the point source in less than 5 min.
CUSTODION™ and GUARDION™ are registered trademarks of Torion® Technologies Inc. CUSTODION SPME Syringes are manufactured and sold under license from (1) Supleco Analytical® under U.S. Patent 5,691,206 and (2) Brigham Young University under U.S. Patent Application 11/379,716 and/or any divisions, continuations or revisions thereof.
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