Ethylene oxide in peppercorn (piper nigrum)

Ethylene oxide resp. 2-chloroethanol were broadly discussed in the media over the last years. The application of ethylene oxide for plant protection and fumigation of food is prohibited within the EU.

A maximum residue level of 0.1 mg/kg applies for ethylene oxide (sum of ethylene oxide and 2-chloroethanol expressed as ethylene oxide) in peppercorn (piper nigrum).

The aim of the ring test is

  • 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).

A reporting limit of 0.01 mg/kg is required. 


ethylene oxide (sum), 2-chloroethanol, ethylene oxide

Expected time schedule

Please register before:
01 July 2024
Dispatch of samples:
07 October 2024
Deadline for reporting results:
23 October 2024

Costs of P2420-RT

Ring test and material Amount Price per unit
Ethylene oxide in peppercorn (piper nigrum) 500 €
Test material
Pepper, milled, spiked with 2-chloroethanol.
50 g included
Blank material
Pepper, milled, unspiked.
50 g 70 €

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