Sigma-Aldrich/Total Cyanide - WP/PE1054-2ML/2ML

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)

Preparation Note

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

Sample Preparation
Partially fill a 1000mL volumetric flask with reagent-grade water (near 20oC) and add 1mL of 1N NaOH.
Open ampule PE1054-2ML (be careful to avoid cuts on glass) and transfer 1.0mL of concentrate to the volumetric flask.
Fill the volumetric flask to volume with reagent-grade water and mix well.
The sample is now ready for immediate analysis.
A blank reagent-grade water sample should be analyzed concurrently for background correction. Remember to match the NaOH matrix of the sample.
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 1mL of 1N 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 analysts “normal routine” , it is his/her option to change the recommendation.

Safety: