1.99011
Buffer solution
(Potassium tetraoxalate) traceable to SRM from NIST and PTB pH 1.68 (25°C) Certipur®
別名:
pH Buffering Solution
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この商品について
NACRES:
NA.25
UNSPSC Code:
41116107
eCl@ss:
25140904
grade
certified reference material
Quality Segment
product line
Certipur®
pH
1.7 (25 °C in H2O)
density
1.003 g/cm3 at 20 °C
application(s)
environmental
food and beverages
general analytical
industrial qc
pharmaceutical
format
mixture
storage temp.
15-25°C
General description
The potassium tetraoxalate certified buffer solution is gravimetrically prepared using high-quality reagents and water at a registered calibration laboratory. Its pH value of 1.68 at 25°C is measured using a combined glass electrode following a 5-point calibration method. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The buffer′s pH value depends on the temperature and therefore a constant temperature must be maintained during its use.
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.
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.
Legal Information
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
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保管分類
12 - Non Combustible Liquids
引火点 (F)
Not applicable
引火点（°C）
Not applicable