Properties:

Description:

General description

This proficiency testing sample is produced in accordance with ISO/IEC 17043:2010. All information regarding the use of this material can be found in the reporting packet supplied for each sample.

Other Notes

Proficiency testing samples are presented as single blind. No values for the samples are released until the testing period concludes. Values of analytes vary lot to lot.

Proficiency Testing Schedule (2017-2018)

Wastewater
WP17-1 January 18 - March 3, 2017
WP17-2 March 29 - May 12, 2017
WP17-3A May 17 - June 30, 2017
WP17-3B July 12 - August 25, 2017
WP17-4 September 27 - November 10, 2017
WP17-5 November 22 - January 5, 2018

WP18-1 January 17 - March 2, 2018
WP18-2 March 28 - May 11, 2018
WP18-3A May 16 - June 29, 2018
WP18-3B July 11 - August 24, 2018
WP18-4 September 26 - November 9, 2018
WP18-5 November 21 - January 4, 2019

Quick-Turn Study - (non-scheduled proficiency test that is available at any time)

Packaging

This PT sample PE1148-20ML and PE1096-20ML are packaged as 20 mL concentrate. The solvent for this sample is water. The PT sample has been autoclaved for preservation.

Preparation Note

Sample preparation
To prepare solution, partially fill a 1 L volumetric flask with reagent-grade water (near 20 °C).
Allow both ampules to equilibrate to room temperature and shake both samples well prior to opening. Due to lower solubility at refrigeration temperatures the sample may show precipitate. The precipitate will go back into solution once the sample warms and is shaken.
Open ampule PE1148-20ML (be careful to avoid cuts on glass) and transfer 10.0 mL of concentrate to the volumetric flask.
Open ampule and PE1096-20ML and transfer 10.0 mL of concentrate to the same flask.
Fill the flask to volume with reagent water.
Mix well.
The sample is now ready for immediate analysis.

Determine alkalinity and spec. cond. first. If Ca, Mg, and hardness are not to be determined during the day the sample was prepared, acidify (pH<2) an aliquot of the freshly prepared sample with nitric acid for later analysis. For other determinations, this solution is stable for at least a month if adequately stoppered.
Note: Alkalinity results may be biased if a blank correction is not applied. To compensate for the 980 mL of reagent water used to dilute the 20 mL of ampule contents, titrate an aliquot of reagent water (use the same volume as sample analysis); subtract 98% of the required titrant from that measured for the sample.
Note: Ampule 1 contains hardness, calcium, and magnesium. For these analytes ampule 1 can be diluted by itself 10 mL to 1000 mL. For all of the other analytes the above instructions must be followed.

Safety: