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Supelco

Certified sec. standard reference buffer solution

potassium dihydrogen phosphate/di-sodium hydrogen phosphate, pH 7.41 (25 °C), Certipur®

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grade

certified reference material

Quality Level

agency

complies with DIN 19266

product line

Certipur®

composition

potassium dihydrogen phosphate/di-sodium hydrogen phosphate

pH

7.41 (25 °C)

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

format

mixture

storage temp.

15-25°C

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This Item
1.072041.072031.07202
product line

Certipur®

product line

Certipur®

product line

Certipur®

product line

Certipur®

grade

certified reference material

grade

certified reference material

grade

certified reference material

grade

certified reference material

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

agency

complies with DIN 19266

agency

complies with DIN 19266

agency

complies with DIN 19266

agency

complies with DIN 19266

composition

potassium dihydrogen phosphate/di-sodium hydrogen phosphate

composition

-

composition

-

composition

potassium dihydrogen phosphate/di-sodium hydrogen phosphate

General description

The certified secondary standard reference buffer solution of potassium dihydrogen phosphate/disodium hydrogen phosphate is gravimetrically prepared using high-quality reagents in high-purity water. Its pH value is analyzed by differential potentiometry with two platinum hydrogen electrodes against primary certified reference materials from NIST & PTB. Also, the pH analysis uses the 5-point calibration method, following DIN 19268, against certified primary reference standards as per DIN 19266.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

The buffer solution can be used for the calibration, qualification, and monitoring of pH measuring instruments and as a control for testing other buffer solutions.

Features and Benefits

  • Available in solution format in a secure 100 mL high-density plastic bottle
  • Subjected to detailed stability studies as per ISO Guide 35
  • Product label having relevant information on order number, article description, lot number, expiry date and safety data, in accordance with ISO Guide 31
  • Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective quality management system
  • Measured and qualified in ISO/IEC 17025 and ISO 17034 accredited laboratory
  • Traceable to SRMs from NIST and primary certified reference standards from PTB

Analysis Note

pH-value: 7.414 - 7.420
For complete data see the enclosed certificate

Legal Information

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

12 - Non Combustible Liquids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable


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