Sigma Aldrich Demand - WP 20 ML

Mulai dari

Rp. 1,802,500
Katalog PE1130-20ML
Brand Sigma Aldrich
Kondisi New

Harga dan Ketersediaan

Katalog PE1130-20ML
Ukuran 20 ML
Ketersedian Hubungi Kami
Harga Rp. 1,802,500


Related CategoriesAdditional StandardsAnalytical Standards,Analytical/ChromatographyDMRQA PTsProficiency Testing.
packaging  ampule of 20 mL
mfr. no.  RTC, PEI-026
concentration  in H2O


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 (2018-2019)

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 

WP19-1 January 16 - March 1, 2019
WP19-2 March 27 - May 10, 2019
WP19-3A May 15 - June 28, 2019
WP19-3B July 10 - August 23, 2019
WP19-4 September 25 - November 8, 2019
WP19-5 November 20 - January 3, 2020

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

Preparation Note

This PT sample is packaged as a 20 mL concentrate. The solvent for this sample is water. The PT sample has been autoclaved for preservation. 

Sample Preparation

To prepare solution, partially fill a 1L volumetric flask with reagent-grade water.
Open ampule PE1130-20ML (be careful to avoid cuts on glass) and transfer 10mL from the ampule into the flask.
Fill the volumetric flask to volume with reagent-grade water and mix well.
The sample is now ready for immediate analysis. 
Analyze the solution to determine BOD or CBOD first. If COD and TOC cannot be determined within two hours after sample preparation, an aliquot should be preserved (pH<2>Note - For proper oxygen depletion of BOD and CBOD, the sample should be tested in a dilution series. Use a natural surface water or diluted domestic sewage for seeded dilution water and avoid entrainment of air. For analysis of CBOD, the use of a nitrifying inhibitor is recommended. Be sure to determine the “blank” BOD of your seeded dilution water so that the proper seed correction can be made.


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