British Standards Institution

Source:: ISO
Committee:: CH/437 - Electronic Cigarettes & E-liquids
Categories:: Information management | Standardization. General rules | Agriculture and Food | Agriculture | Tobacco

Scope

The scope of ISO 20768 will not change

Purpose

The current standard contains the requirement “The maximum flow rate shall be 18,3 ml/s ± 1,8 ml/s”. The wording maximum flow rate is problematic because it describes the situation under the estimation of an ideal rectangular shaped puff profile as shown in Figure 1. In this case the maximum flow rate is equal to the average flow rate once the puff plateu is reached.

In reality, caused by mechanical suction, the puff profile is never ideal and therefore the maximum flow rate is not equal to the average flow rate but the average flow rate is the value of interest to ensure an accurate and reproducible puffing.

We therefore propose to change the wording to: “The average flow rate shall be 18,3 ml/s ± 1,8 ml/s” and add an informative note.

Comment on proposal

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Discard

Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

26/04/2023

Proposal end date:

18/06/2023

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

Learn more about the standards development process

Standards Development

ISO/NP 21684 ISO 20768, Vapour products -- Routine analytical vaping machine -- Definitions and standard conditions -- Amendment 1: Correction of puff profile requirements

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