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)

Drinking Water
WS17-1 January 18 - March 3, 2017
WS17-2 March 29 - May 12, 2017
WS17-3 July 12 - August 25, 2017
WS17-4 September 27 - November 10, 2017

WS18-1 January 17 - March 2, 2018
WS18-2 March 28 - May 11, 2018
WS18-3 July 11 - August 24, 2018
WS18-4 September 26 - November 9, 2018

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

Preparation Note

This PT sample is packaged as a 2 mL concentrate.
The solvent for this sample is 1% NaOH in water.
The PT sample has not been preserved.

Sample preparation
Partially fill a 1000-mL volumetric flask with reagent-grade water (near 20 degrees C) and add 1 mL of 1 N NaOH.
Open ampule PE1573-2ML (be careful to avoid cuts on glass) and transfer 1.0 mL of concentrate to the volumetric flask.
Fill the volumetric flask to volume with reagent-grade water and mix well.
The sample must be analyzed as soon as possible after opening the ampule and diluting to volume.
NOTES: Keep the ampule shielded from ultraviolet radiation. Direct exposure to sunlight or any source of U.V. radiation may cause significant change in concentration.
The specified addition of 1 mL of 1 N NaOH is only a recommended minimum to prevent the loss of cyanide.
If another amount, or even another base (such as KOH) is part of the analyst′s “normal routine”, it is his/her option to change the recommendation.

Safety:

Symbol 

  GHS07