Proficiency tests for environmental and water laboratories.

Spring 2018


Suspended solids + Sludge

Total suspended solids, Fixed ignition residue, Coarse particles (part B only)

Part A: Municipal wastewater, treated
Part B: Paper industry wastewater, treated

Dry weight, Fixed ignition residue, pH, alkalinity

Part C: Digested sludge, wet

Final report


Metals and trace elements

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

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

Final report


Nutrients + Odour

NO2-N, NO3-N, NO23-N, NH4-N, Ntot, PO4-P, Ptot, Si, colour (Hazen), pH, conductivity
NEW! BOD (part A only)

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


Part C: 4 samples

Final report

Autumn 2018


Ion Balance

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

Part A: Potable recipient
Part B: Humic recipient
Part C: Chlorophyll

  • Dispatch: September 3
  • Analysis: September 6
  • Reporting deadline: September 26



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

Part A: Municipal wastewater, treated

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

Part B: Paper industry wastewater, treated


Part C: Paper industry wastewater

  • Dispatch: September 24
  • Analysis: September 27
  • Reporting deadline: October 17

Proficiency Tests 2018

Information och program (pdf)

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