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AQA 24-32 liquefied petroleum gas

June 2024

This proficiency test is part of our 2024 proficiency testing (PT) program for gas mixtures. The study is covered by our PT provider accreditation (ISO 17043).

Registrations close 1 April 2024.

Test materials

We’ll prepare and distribute each PT sample in a 0.5 L constant pressure cylinder (CPC).

Liquefied petroleum gas (LPG) samples will contain these components (nominal mole fractions only):

  • Ethane ≤ 0.5 % 
  • n-Butane ≤ 0.5 % 
  • Propane as balance.

Reference values for the comparison are traceable to the SI (International System of Units) registered in the KCDB (Key Comparison Database).

Sample distribution and reporting


  • distribute samples by 1 June 2024
  • issue the PT report in September 2024.

Once you’ve completed the study you must do the following by 15 August 2024:

  • submit your measurement results
  • include a brief description of the test method
  • include an expanded measurement uncertainty estimate, if applicable
  • return the sample cylinders.


The cost to participate is $1,550 and includes:

  • goods and services tax (GST)
  • delivery to Australian sites. 

You must pay extra for:

  • return freight
  • all international freight and duty charges.

To apply

Read out proficiency terms and conditions. Then email with your:

  • contact name
  • phone
  • delivery address
  • organisation
  • ABN, if you’re an Australian participant.