Operation Model
Test samples are prepared in IQS, who guarantees sample batch homogeneity and stability, and sent to each participant.
Parameters to be analysed are content of boron, lithium, fluorine, chloride, sulphate, silicate, ammonium, sodium, copper and iron.
Each laboratory receives a 4-digit secret code to identify exclusively and privately its own results.
Two exercises per year are programmed (April and October), with two lots of samples in each round.
Statistical treatment of results is done according to ISO 13528:2005 “statistical methods for use in proficiency testing by inter-laboratory comparisons”.
Detailed results for each sample and parameter are delivered to each participant in form of tables and graphics.