ENDS and e-liquid – emissions Analysis for regulatory compliance.
Analysis of the emissions from ENDS and e-liquid is required for regulatory compliance and provides an insight into the safety and quality of your product. The list of analytes having been determined by the regulatory bodies – see the Science Behind the Requirements – as compounds of concern.
Aerosol samples are generated using a Cerulean SM450e vaping machine, using a regime based on CORESTA Recommended Method No 81:
- Puff volume – 55ml
- Puff duration – 3s
- Puff interval – 30s
- Puff profile – Square wave
All these parameters (along with puff block – the number of puffs taken) can be verified and adjusted as required due to the flexibility of the instrument.
The extraction and analysis of aerosol samples at Hall Analytical are also based upon CORESTA methodologies, which were developed during the course of testing traditional tobacco products. We have recognised however that vaping is different, with respect to traditional tobacco smoking:
- The presence of large amounts of PG (propylene glycol) and VG (vegetable glycerin) can cause saturation/interference issues at the point of collection and subsequent analysis.
- The emission can condense easily post aerosolisation meaning that the dead volume between the mouthpiece of the device and the collection medium must be kept to a minimum.
- There are many different kinds of devices on the market, with a variety of shapes of mouthpiece and different forms of actuation – button or puff activated.
- The emission profile can change dependant on the power applied to the device and the stability of battery output.
- Multiple collections are required to generate samples for the whole suite of testing; e.g. the nicotine dose sample would not be amenable to analysis for carbonyl compounds.
As such, our approach reflected this. We were reluctant to compromise on selectivity and sensitivity by trying to develop a method which would encompass the entire list of target analytes using just one collection medium e.g. CFP (Cambridge Filter Pad) or TD (Thermal Desorption) tube. With this mentality, we also didn’t want to compromise the quality of our data by trying to analyse for all of the compounds using one analytical run. We evaluated multiple techniques for each type of testing in order to ascertain the most selective and sensitive methods (grouping analytes together where possible) whilst also bearing in mind preparation and acquisition times to keep costs at a minimum.
To discuss your testing requirements call: +44 (0)161 286 7889