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Highly polar pesticides and contaminants in green tea (P1908-RT)

Picture green tea

Ring test P1908-RT is designed to cover the most frequent highly polar pesticides and contaminants in green tea.

The test material consists of green tea (homogenate, 50 g), spiked with

  • anthraquinone,
  • biphenyl,
  • chlorate and perchlorate,
  • nicotine,
  • glyphosate and AMPA,
  • diquat and paraquat.

The analytical data are assessed with respect to

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

Time schedule:

  • Registration is open until:
    15 December 2018
  • Dispatch of samples:
    25 February 2019
  • Deadline for reporting results:
    14 March 2019

Participation fee: 
    750 EUR (parameters: anthraquinone, biphenyl, chlorate, perchlorate)
 + 200 EUR (optional module: nicotine, glyphosate, AMPA)
 + 200 EUR (optional module: diquat and paraquat)

A sample of the untreated (blank) green tea (50 g) is included in the participation fee. 


The test material is shipped by express courier. Shipping costs are included for shipment to EU countries. Additional shipping costs may apply for shipment to Non-EU countries.
Please feel free to contact us to get an individual quote. 

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