Description of the programme

These interlaboratory comparisons (AGLAE's programme ‘41’) in sewage sludges from water treatment plant are provided in the frame of:
  • accreditation scopes related to analyses in sewage sludges (check Cofrac accreditation No. 1-1664)

Number of tests
Number of participants
check the annex
Accreditation of the programme
yes for all the parameters
Cost of the programme*
570 € excl. VAT
Date of the tests
check the annex (register up to one month before distribution)
* For laboratories internationally, shipping costs are extra

List of parameters

dry matter

PAHs: acenaphtene, acenaphtylene, anthracene, benzo[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[g,h,i]perylene, benzo[k]fluoranthene,  chrysene, dibenzo[a,h]anthracene, fluoranthene, fluorene, indeno[1,2,3-cd]pyrene, naphtalene, phenanthrene, pyrene,

PCBs: congener 101, congener 118, congener 138, congener 153, congener 180, congener 28, congener 52, Sum of congeners 28, 52, 101, 118, 138, 153, 180

On raw sludge: total organic carbon (TOC), Al, As, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Sn, 
Sum (Cr + Cu + Ni + Zn), Total Kjeldahl Nitrogen (TKN), total-C, total-N, Total-P, Total-S, Zn, dry matter, loss on ignition at 550°C, pH

A.G.L.A.E. provides proficiency tests on the one hand on raw materials (to include the part of measurement uncertainty due to the pretreatment phase like in your routine analyses) and on the other hand on pretreated materials (to guarantee the presence of all the parameters to analyse and carry out enhanced monitoring on the analytical part of the analysis, predominant source of uncertainty).

  • Pretreated material: material dried, crushed and sieved.
  • Raw material: material dried, lightly crushed but not sieved. If we are not able to guarantee the presence of all the parameters listed, an evaluation of your results will still be carried out (check of false positives).


Quality Control MaterialsQuality Control Materials coming from proficiency tests of this programme are available. They are provided with a certificate (includes a synthesis of the precision values obtained during the test).

Please contact us if you are interested in these materials.