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Quaternary ammonium compounds (P1505-RT)

In March 2015 PROOF-ACS organised and performed a ring test related to quaternary ammonium compounds (QAC). 

Two test materials (180 g, homogenates) were offered:

  • Carrot spiked with
    BAC C-12,
    BAC C-14,
    BAC C-16, and
    DDAC C-10.

  • Vanilla ice cream spiked with
    BAC C-12,
    BAC C-14,
    BAC C-16, and
    DDAC C-10. 

It was up to the participants to order one or both test materials. Blank material was provided upon request. 

  • Dispatch of samples:
    March 16, 2015
  • Deadline for reporting results:
    April 1, 2015


The analytical data are assessed with respect to

  • the comparability (z-score), and
  • the trueness (70 to 120% of the spiked level).

A summary of the report is available here.

Participation fee:
350 EUR basic price (general costs for organisation, evaluation, etc.)
250 EUR for each of the two test materials
  70 EUR for each of the blank materials (optional)