At Smart Inspections, we provide the Laboratory Composite Test which is where individual wipe samples are taken according to the NIOSH 9111 technique and sent to a laboratory that is IANZ accredited for analysis. The lab extracts each sample as an individual in the first instance, but then combines equal portions of the extracts to form a new sample called a Lab Composite. Only the new lab composite sample is analysed on the instrument, and the result represents an average concentration.
The strengths of the Lab Composite technique are that it is NIOSH 9111 compliant, it is significantly cheaper than individual sample analysis and the result can be compared with the regulatory limit. The Lab analysis also includes testing for three precursor drugs; Ephedrine, Pseudoephedrine and Amphetamine. If a positive is found, a request can be made to the laboratory to analyse the individual samples if required without having to return to the dwelling to re-sample.