BS ISO 23919:2020 pdf free.Cigarettes一Determination of ammonia in cigarette mainstream smoke using ion chromatography.
BS ISO 23919 1 Scope This document specifies a method for the quantification of ammonia by ion chromatography in mainstream smoke using ISO 3308 smoking parameters.This method is applicable to cigarettes with ammonia yields between 1 μg/cigarette and 30 μg/cigarette. It is not applicable for the determination of ammonia in dark- air cured cigarettes.2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3308, Routine analytical cigarette-smoking machine一- Definitions and standard conditions ISO 3402, Tobacco and tobacco products一Atmosphere for conditioning and testing ISO 4387 Cigarettes 一Determination of total and nicotine-free dry particulate matter using a routine analytical smoking machine ISO 8243, Cigarettes一Sampling.Ammonia is collected by passing the mainstream smoke of cigarettes through either a) a glass fibre filter pad as specified in ISO 3308 followed by impinger traps containing dilute sulphuric acid (trapping system 1 in the document), or b) an impregnated glass fibre filter pad followed by an untreated glass fibre filter pad (trapping system 2 in the document). The glass fibre filter pad is extracted either with the impinger solutions (trapping system 1) or with dilute hydrochloric acid (trapping system 2). The obtained solutions are analysed by ion chromatography using an external standard calibration.To determine whether a leak has occurred in the analytical smoking machine setup, use a leak tester. If the fluid column does not maintain its position but drops, there is a leak in the system. It is recommended that tubing other than silicone tubing is used for connections between the analytical smoking machine and the impingers (i.e. polypropylene). Methyl silicone tubing is not recommended since adsorption of the analytes can occur. Tubing shall be as short as possible to minimize the potential for any adsorption. BS ISO 23919 pdf download.