Ethylene oxide and PCP in guar gum

Ethylene oxide / 2-chloroethanol as well as PCP are typical contaminations of the plant-based thickener guar gum.

P2611-RT is designed to cover both contaminations:

module 1: ethylene oxide / 2-chloroethanol, and
module 2: PCP.

The basic price of 450 EUR covers the general costs for the preparation, the shipment, the homogeneity testing etc., while the costs for the individual module cover the individual costs for the spiking and the evaluation of the parameters. Please feel free to book the two modules separately or both of them, depending on your needs.

The analytical data are assessed with respect to

to the comparability criterion (z-score), and
with respect to the trueness criterion (70-120 % recovery of the spiked level).

Parameters

Module 1 - ethylene oxide

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

Module 2 - pentachlorophenol

pentachlorophenol

Expected time schedule

Please register before:
15 December 2025

Dispatch of samples:
23 February 2026

Deadline for reporting results:
11 March 2026

Costs of P2611-RT

Ring test and material	Amount	Price per unit
Ethylene oxide and PCP in guar gum	–	450 €
Basic price for organisation, shipment, reporting	50 g	included
Module 1 - ethylene oxide Spiked with 2-chloroethanol.		200 €
Module 2 - pentachlorophenol Spiked with pentachlorophenol		200 €
Blank material	50 g	70 €

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