pt2 protocol 1

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CARDS 2006Regional Quality Infrastructure project

Proficiency Testing

Albania Bosnia & Herzegovina Croatia

Montenegro Serbia-the Former Yugoslav Republic of Macedonia

PT 2 Scheme Drinking water

PT Protocol

PROVIDER:University of LjubljanaFaculty of Electrical EngineeringLaboratory of Metrology and qualityTraka 25, SI-1000 Ljubljana, Slovenia

PILOT LAB:Center for ecotoxicological research of Montenegro

Put Radomira Ivanovia 281000 Podgorica, MontenegroTel.: +382 81 658 090Danijela ukovie-mail: [email protected]

Purpose of the scheme

The aim of this proficiency testing is to picture objectively the degree of equivalence andthe quality of physical-chemical measurements by comparing participants measurementresults with external reference values. These reference values are completely independentfrom the participants results.

The above project, funded by the European Commission and EFTA, has contracted theUniversity of Ljubljana to conduct a very wide-ranging series of intercomparisons for

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laboratories in the countries of the Western Balkans. The Center for ecotoxicologicalresearch of Montenegro has been chosen as a pilot laboratory for drinking water PT.

Collaborators

An expert advisor assigned to PT2 testing scheme is Dr. Janja Turi from theEnvironmental Agency of the Republic of Slovenia.

Participants

There are eight participants to this intercomparison. Contact details are listedalphabetically:

Albania

Participating laboratory: Public Health institute(AL)Contact person: Pranvera KASAJAddress: Alexander MOISIU 80Zip: 1000City: TiranaPhone: +355 4374756Mobile: +355 692387042Email: [email protected]

Bosnia and Herzegovina

Participating laboratory: Watersupply Sarajevo (Federation BiH)Contact person: Mrs. Senija AlimanoviAddress: ul. Jaroslava ernija 8Zip: 71000City: SarajevoPhone: +387 33 440 024Mobile: +387 61 520 613Email: [email protected]

Participating laboratory: Tati d.o.o Tati laboratory

Contact person: Mrs. Radoslava PijunoviAddress: Osjeani bbZip: 74225City: Osjeani-DobojPhone: +387 53 284 023Mobile: +387 65 709 384Email: [email protected]

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Croatia

Participating laboratory: Public Health Institute of Istrian Country (HR)Contact person: Mrs. Sonja DikoviAddress: V. Nazor23

Zip: 52100City: PulaPhone: +385 52 529 060Fax: +385 52 529 076Email: [email protected]

The Former Yugoslav Republic of Macedonia

Participating laboratory: Republic Health Protection Institute (MK)Contact person: Mrs. Svetlana Toevska

Address: ul.50-ta Divizija br 50Zip: 1000City: SkopjePhone: +389 2 312 5044Mobile: +389 70 809 144Email: [email protected]

Serbia

Participating laboratory: Public Health Institut"Dr Milan Jovanovi Batut" (RS)Contact person: Mr. Dejan Nati

Address: Dr Subotia 5Zip: 11000City: BeogradPhone: +381 11 268 5593Fax: +381 64 244 8006Email: [email protected]

Participating laboratory: National Public Health Institute (Kosovo, UNSCR 1244)Contact person: Dr. Burbuqe Nushi-Latifi

Address: University clinical Hospital,Center Compound, Mother Theresa nn Prishtina -Kosovo UNMIKZip: 10000City: PritinaPhone: +381 38 551 431Mobile: +377 44 127 617Email: [email protected]

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Republic of Slovenia

Participating laboratory: Envoronmental Agency of the Republic of Slovenia (SI)Contact person: dr.Janja Turi

Address: Vojkova 1BZip: 1000City: Ljubljanae-mail: [email protected]

Test items and parameters

In order to prepare samples with matrixes that are as close as possible to routine drinkingwater samples, test items of concern will be tap water and spiked tap water.

In the following table are presented parameters and proposed methods for the PT. Inaddition, laboratories may use methods they are accredited for or methods they use forroutine measurements.

Parameter Proposed method of analysis

pH at 25 0C ISO 10523Electrical conductivity at 25 0C (S/cm) EN 27888

Chlorides (mg/l) ISO 10304-1 or alternative methodSulphates (mg/l) ISO 10304-1 or alternative methodSodium (mg/l) ISO 9964-3 or alternative method

Potassium (mg/l) ISO 9964-3 or alternative method

Lead (g/l) ISO 15586 or alternative methodCadmium (g/l) ISO 15586 or alternative method

Storage conditions

The water will be bottled in 8 polyethylene containers, each of them containing about 100ml, with clerly denoted parameters to be measured on each sample. Laboratories usingflame atomic absorption spectrometric method will receive larger volumes for Cd and Pbanalyses (one 1 l bottle for the analyses of both Cd and Pb). Samples for Pb and Cd

determinations will be acidified with HNO3 to pH between 1 and 2.

The participating laboratories are requested to reply regarding date of package receptionvia e-mailed form.

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Reporting of results

All participating laboratories are required to report the results electronically via theInternet in the e-mailed report form. Report the measurement results for as many of theeight parameters as possible, standard deviation conected with results, methods used and

date of analyses.

Outline of statistical analyses

The assigned values are to be determined by the means of reference measurements madeby the Pilot Lab. The participants will receive summary of all measurements, referencevalues and uncertainties of reference values, and evaluation of the performance. Theevaluation of measurement results will be made on the basis of Z-score:

Z =

Xx

wherex : participants resultX : reference value : target value for standard deviation

The following criteria are used to judge the performance of the laboratories in aproficiency testing programeme:

Z 2, results are satisfactory;

2 < Z< 3, results are questionable;

Z 3, results are unsatisfactory.

Deadlines

You will receive packages with samples until 10th March 2008. The deadline forreporting the results is 10th April 2008. The report for the participants containingreference values and Z-scores of individual laboratories will be distributed until 10 th May2008.

Date: March 4, 2008

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pt2 protocol 1

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