Filter/dilution tunnel. A smoke sample is drawn by way of a tube where by it is diluted with air, the ensuing smoke/air combination is then pulled by way of a filter and weighed. This can be the internationally identified way of measuring smoke from combustion.[sixty six] DNA. Arsenic, nickel https://broadfar.com/oraco-pioneering-a-smokeless-future-with-innovative-nicotine-delivery/