Polar pesticides in chia seeds

Non-homogenised chia seeds (200 g) are offered as test material of P2211-RT.

The chia seeds are spiked with

  • chlorate and perchlorate,
  • glyphosate,
  • phosphonic acid,
  • nicotine,
  • diquat and paraquat,
  • morpholine, diethanolamine, triethanolamine,
  • a selection of quaternary ammonium compounds (BAC C-8 to C-18 and DDAC C-8 to C-12).

The aim of the ring test is

  • the identification of the spiked quaternary ammonium compounds,
  • the correct quantification with respect to the
    comparability criterion (z-score ≤ |2|), and
  • the correct quantification with respect to the
    trueness criterion (70-120 % recovery of the spiked level).

Laboratories are free to choose the basic module only or combined with one or more of the additional modules. 

Reporting limits of 0.01 mg/kg are required for all parameters. 


Basic module

chlorate, perchlorate, glyphosate, phosphonic acid, nicotine

Module 1

diquat, paraquat

Module 2

morpholine, diethanolamine, triethanolamine

Module 3

BAC C-8, BAC C-10, BAC C-12, BAC C-14, BAC C-16, BAC C-18, DDAC C-8, DDAC C-10, DDAC C-12

Expected time schedule

Please register before:
15 March 2022
Dispatch of samples:
09 May 2022
Deadline for reporting results:
23 May 2022

Costs of P2211-RT

Ring test and material Amount Price per unit
Polar pesticides in chia seeds 690 €
Basic module
Chlorate, perchlorate, glyphosate, phosphonic acid, nicotine.
200 g included
Module 1
Diquat, paraquat.
150 €
Module 2
Morpholine, diethanolamine, triethanolamine.
150 €
Module 3
Quaternary ammonium compounds.
150 €
Blank material
Non-homogenised seeds, unspiked.
150 g 70 €

Note: PROOF-ACS reserves the right to cancel tests in case of less than ten participants.