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

Distribution Schedule 2024

Round Registration
Final Report

Round March 2024 09/02/2024 26/02/2024 22/03/2024 09/04/2024
Final Reports in the Customer Area

Round October 2024 27/09/2024 14/10/2024 08/11/2024 25/11/2024
Registration Deadline: 27/09/2024
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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 12457-2:2002 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)
  • Total fixed solids at 550oC [°] *
*: The determination of the measurands Dry mass at 105 oC and Total fixed solids at 550 oC must be performed on 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.

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