Abstract
The QS-B220 Explosives Trace Detector (ETD; Implant Sciences Corporation, Wilmington, MA, USA) was tested to determine whether Sample Traps (Impant Sciences Part No. 42200191 REV) contaminated with severe acute respiratory syndrome coronavirus (SARS-CoV-2) can be effectively decontaminated for re-use during normal operation. Sample Traps were inoculated with a known concentration of SARS-CoV-2 (strain USA-WA1/2020), allowed to dry at ambient conditions, and inserted into the QS-8220 ETD’s Sample Desorber (i.e., the sample port). During normal operation, heat is generated and directed at the Sample Trap undergoing analysis, and it was the heating process that was evaluated for decontamination efficacy against the virus. Each Sample Trap was inserted into the QS-8220 ETD at least two times (constituted a single exposure) to ensure that it was completely heated. Multiple exposures were tested, but it only took a single exposure inside the QS-8220 ETD to result in no recoverable infectious SARS-CoV-2 (based on the 1.31 × 101 median tissue culture infectious dose [TCID50] limit of detection) and expressed as 5.29 log reduction from the Sample Traps.
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