General description
The buffer solution (citric acid/sodium hydroxide/hydrogen
chloride) is gravimetrically prepared using high-quality reagents in
high-purity water. It is quality controlled and qualified in an ISO/IEC 17025
accredited calibration lab. Its pH value of 4.00 at 20°C is qualified using a
combined glass electrode following a 5-point calibration method, in accordance
with DIN 19268, against certified primary reference standards as per DIN 19266,
IUPAC, NIST, USP, and Ph. Eur.
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
It is used in analytical procedures for calibration,
qualification, and monitoring of pH measuring instruments and as a control for
testing other buffer solutions.
Features and Benefits
- Measured
and qualified in an ISO/IEC 17025 and ISO 17034 accredited laboratory
- Traceable
to SRMs from NIST and primary certified reference standards from PTB
- Ready-to-use
solution available in a sealed bottle and an innovative Titripac® packaging
for positive environmental impact due to reduced waste generation
- Long-lasting
with a shelf life of 3 years
- Accompanied
with a batch-specific and detailed certificate of analysis (CoA) for an
effective audit
Legal Information
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt,
Germany
Titripac is a registered trademark of Merck KGaA, Darmstadt,
Germany
