Interlaboratory Proficiency testing: Leaching test according to standard EN 12457-2 (Solid waste)

Distribution Schedule 2022

Round Registration
Final Report

Round March 2022 11/02/2022 28/02/2022 25/03/2022 11/04/2022
Final Reports in the Customer Area

Round October 2022 30/09/2022 17/10/2022 11/11/2022 28/11/2022
Registration Deadline: 30/09/2022
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Scope of the Interlaboratory Proficiency Testing

The scope of this proficiency testing is to assess the analytical performance of testing laboratories in the execution of the leaching test according to standard EN 12457-2 on sewage sludge, solid waste and similar matrices.

Interlaboratory proficiency testing organized in accordance with the standard ISO/IEC 17043:2010 - Conformity assessment — General requirements for proficiency testing and accredited by ACCREDIA, Italian accreditation body, with the accreditation number PTP n. 0014 P. Download the Accreditation Certificate.


  • Antimony (Sb)
  • Arsenic (As)
  • Barium (Ba)
  • Cadmium (Cd)
  • Chromium total (Cr)
  • Copper (Cu)
  • Lead (Pb)
  • Mercury (Hg)
  • Molybdenum (Mo)
  • Nickel (Ni)
  • Selenium (Se)
  • Zinc (Zn)

  • Chemical Oxygen Demand (COD) [°]
  • Chloride
  • Conductivity (20 oC)
  • Dissolved Organic Carbon (DOC)
  • Dry mass at 105 oC [°] *
  • Nitrate [°]
  • pH (25 oC)
  • Sulfate
  • Total Dissolved Solids (TDS)
*: Dry mass at 105 oC of the “as-received” test sample.

Proficiency test item

  • 1 x 150g of sewage sludge ready to use.

ADDITIONAL TEST SAMPLES: For costs and availability of additional test samples contact Qualitycheck (e-mail


The analysis must be performed following the analytical procedure prescribed by the standard EN 12457-2:2002 "Characterisation of waste - Leaching - Compliance test for leaching of granular waste materials and sludges - Part 2: One stage batch test at a liquid to solid ratio of 10 l/kg for materials with particle size below 4 mm (without or with size reduction)".

For each measurand, one measurement result shall be reported.

[°]: The measurands marked with the symbol [°] are not included in the scope of accreditation of this
proficiency testing.

  • Request a quote

    Download and complete the Application Form, selecting for each matrix, the measurands and the period in which you want to participate. Send it by email ( or by FAX (0039 0656562874).


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