Filter/dilution tunnel. A smoke sample is drawn by way of a tube the place it really is diluted with air, the ensuing smoke/air combination is then pulled via a filter and weighed. Here is the internationally recognized technique of measuring smoke from combustion.[66] DNA. Arsenic, nickel and radioactive polonium https://broadfar.com/non-combusted-cigarettes-a-safer-alternative-or-just-a-myth/