Proficiency testing (PT): Chemical and Physical-Chemical parameters in natural waters

Proficiency testing (PT): Chemical and Physical-Chemical parameters in natural waters

Distribution Schedule 2019



Round Registration
deadline		 Despatch
samples		 Reporting
deadline		 Final Report
February 2019 18/01/2019 04/02/2019 01/03/2019 18/03/2019
Final Reports in the Customer Area
May 2019 03/05/2019 20/05/2019 14/06/2019 01/07/2019
Final Reports in the Customer Area
September 2019 06/09/2019 23/09/2019 18/10/2019 04/11/2019
Deadline reporting results: 18/10/2019

Scope of the Interlaboratory Proficiency Testing

The scope of this proficiency testing is the evaluation of the performance of laboratories for the determination of the physical chemical parameters in natural waters (ex. drinking water, mineral water, groundwater, etc.).

Parameters

  • Alkalinity
    (25 - 400 mg/L CaCO3)
  • Ammonium
    (0.10 - 1.50 mg/L NH4)
  • Calcium
    (10 - 150 mg/L)
  • Chloride
    (10 - 200 mg/L)
  • Conductivity (20 oC)
    (100 - 1500 microS/cm)
  • Fluoride
    (0.50 - 5.00 mg/L)
  • Magnesium
    (2 - 40 mg/L)
  • Nitrate
    (5 - 50 mg/L NO3)
  • Nitrite
    (0.10 - 2.00 mg/L NO2)
  • Permanganate index
    (1 - 20 mg/L O2)
  • pH (20 oC)
    (6.5 – 9.5 U)
  • Phosphate
    (1.50 - 15.0 mg/L PO4)
  • Potassium
    (1 - 50 mg/L)
  • Sodium
    (5 - 100 mg/L)
  • Sulphate
    (10 - 300 mg/L SO4)
  • Total Dissolved Solids (Dried at 180°C) (100 - 1500 mg/L)
  • Total Hardness
    (5 - 30 oF )
  • Total Organic Carbon (TOC)
    (0.5 - 10 mg/L C)
  • Turbidity
    (2 - 30) NTU

Proficiency test item:

  • 1 x 1000 mL of the test material ready to use for the determination of all parameters except Permanganate index, TOC and Turbidity.
  • 1 x 1000 mL of the test material to be prepared from a natural water matrix and a vial of the spiking solution for the determination of Permanganate index and TOC.
  • 1 x 1000 mL of the test material to be prepared from a natural water matrix and a vial of the spiking solution for the determination of Turbidity.

ANALYSIS: The test sample should be analysed under the same conditions and with the same procedures used for the routine samples in the laboratory including the quality control procedures.

For each measurand shall be reported the result of a replica.

ADDITIONAL RESULTS: Each participant can submit up to 5 results* for the same analyte, thus obtaining an evaluation of laboratory performance for different operators, instruments and/or test methods (e.g. operator 1/operator 2, instrument A/instrument B, etc..).

  • Request a quote

    Download and complete the Application Form, selecting for each matrix, the measurands and the period in which you want to participate. Send it by email (sales@qualitychecksrl.com) or by FAX (0039 0656562874).

    REQUEST A QUOTE 2019


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*: Only one result submitted by the laboratory will be included in the statistical treatment of data for the calculation of the Assigned Value and statistics of data of the analyte, to avoid that a single laboratory has a different statistical weight, depending on the number of its submitted results. The additional results are evaluated by assigning z-score values, using the Assigned Value and the Standard Deviation for Proficiency Assessment obtained from statistical treatment.

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