Proficiency tests for environmental and water laboratories.

Spring 2019

Registration deadline: January 23

Contact us if you have missed the registration date and would like to participate.


Suspended solids + Sludge

Part A: Municipal wastewater, treated

Total suspended solids, Fixed ignition residue

Part B: Paper industry wastewater, treated

Total suspended solids, Fixed ignition residue, Coarse particles

Part C: Digested sludge, wet

Dry weight, Fixed ignition residue, pH, alkalinity, ammonium nitrogen

Documents (only in Swedish)
  • Dispatch: February 4
  • Analysis: February 7
  • Reporting deadline: February 27

February 4, 2019 The samples are dispatched. Get your parcel-ID to trace your delivery.


Metals and trace elements

Part A: Potable water, spiked
Part B: Municipal wastewater, spiked

Al, Ag, As, B, Cd, Co, Cr, Cu, Fe, Hg, Mn, Mo, Ni, Pb, Sb, Se, Si, Sn, Sr, U, V, Zn

  • Dispatch: March 11
  • Analysis (Hg): March 14
  • Analysis (others): day of choice
  • Reporting deadline: April 3


Nutrients + low pH

Part A: Eutrophic recipient
Part B: Municipal wastewater, treated

NO2-N, NO3-N, NO23-N, NH4-N, Ntot, PO4-P, Ptot, Si, colour (Hazen), pH, conductivity
BOD & susp in part A

Part C: Synthetic solution for low pH, provided to all participants
  • Dispatch: April 8
  • Analysis: April 11
  • Reporting deadline: May 2

Autumn 2019


Ion Balance

Part A: Potable water
Part B: Lake water

Colour (Hazen), colour (absorbance), conductivity, pH, turbidity, alkalinity, Ca+Mg, hardness (dH), Ca, K, Mg, Na, chloride, fluoride, sulphate, CODMn, TOC

  • Dispatch: September 2
  • Analysis: September 5
  • Reporting deadline: September 25



Part A: Municipal wastewater, treated

BOD7, CODCr, CODMn, TOC, Na, Conductivity, pH, Alkalinity

Part B: Paper industry wastewater, treated

BOD7, CODCr, TOC, Na, Conductivity, pH, Alkalinity, Ntot, Ptot

  • Dispatch: in September
  • More information later.

Proficiency Tests 2019

Information och program (pdf)

Search analysis codes