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2023 Proficiency Test (PT) on Chlorinated Phenols in Textile started


The letter of instructions can be downloaded here as a pdf document. To download a document, please click the right mouse button and choose the "save as" option.


 Please download the instructions for the PT iis23T47 here: the letter of instructions and the report form here



Summary of this proficiency test:


On 15 November 2023 the proficiency test on Chlorinated Phenols in Textile started with 75 participants from 23 different countries. On that date, the samples were dispatched to the laboratories.

Please confirm sample receipt as soon as you have received and checked the contents of the sample package via Please enter the date of receipt and press the "save date" button.


The samples can be analyzed on: PCP, 2,3,4,5-Tetrachlorophenol, 2,3,4,6-Tetrachlorophenol and 2,3,5,6-Tetrachlorophenol, 2,3,4-Trichlorophenol, 2,3,5-Trichlorophenol, 2,3,6-Trichlorophenol, 2,4,5-Trichlorophenol, 2,4,6-Trichlorophenol, 3,4,5-Trichlorophenol and Other Chlorophenols.


The deadline for reporting results is set on 22 December 2023. A laboratory that reports test results after the deadline will definitely not get direct feedback in case any of its results are suspect! So be in good time to get the most out of this proficiency test.

The test results should be reported via our internet based results reporting platform A login and a password can be requested via email to





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