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Contaminants in black tea (P1801-RT)

Ring test P1801-RT is designed to cover the most frequent contaminants in black tea.

  • Registration is open until:
    December 1, 2017
  • Dispatch of samples:
    January 29, 2018
  • Deadline for reporting results:
    February 13, 2018


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

  • glyphosate,
  • AMPA,
  • trimesium,
  • anthraquinone,
  • biphenyl, and
  • nicotine.


The analytical data are assessed with respect to

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


Participation fee: 
    750 EUR (parameters: gyphosate, AMPA, trimesium)
 + 200 EUR (optional module, parameters anthraquinone, biphenyl, nicotine)

The corresponding untreated tea (homogenate, 50g) is available as blank material
at a price of 70 EUR (optional).

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.