Features and Benefits
Accreditation:
This volumetric solution is analyzed by our calibration laboratory
D-K-15185-01-00 which is accredited according to DIN EN ISO/IEC 17025 for
analysis of amount-of-substance concentrations in volumetric solutions by DAkkS
(Deutsche Akkreditierungsstelle - German National Accreditation Body). The
accreditation certificate can be found at www.sigmaaldrich.com/ISO17025.
Packaging
SKU-pack size numbers ending with a "3" are
SmartChemicals with an RFID tag on the label for seamless data transfer to the
instrument, e.g. xxxxxx1003 or xxxxxxx 4003. More information on www.sigmaaldrich.com/SmartChemicals
Analysis Note
Form liquid
Amount-of-substance concentration 0.04975 - 0.05025 mol/L
Measurement uncertainty ± 0.00015 mol/L
Traceability NIST SRM
The concentration is determined by volumetric titration and refers to 20°C.
The amount-of-substance concentration of this volumetric solution is determined
with standardized hydrochloric acid solution (article number 1.09060). The
hydrochloric acid solution is standardized and traceable to a primary standard
reference material (SRM) from the National Institute of Standards and
Technology, Gaithersburg, USA (NIST SRM 723 Tris(hydroxymethyl)aminomethane) by
means of volumetric standard Tris(hydroxymethyl)aminomethane (article number
1.02408), certified reference material according to ISO 17034, analyzed by our
accredited calibration laboratory of Merck KGaA, Darmstadt, Germany according
to DIN EN ISO/IEC 17025. The uncertainty is expressed as expanded measurement
uncertainty with a coverage factor k=2 covering a confidence level of 95%.
Note: The titer is a correction factor to correct for variations of the
volumetric solution, the titration equipment, the temperature and other
laboratory conditions. For correct titration results it is recommended to
determine a titer with the laboratory specific equipment and under laboratory specific
conditions directly after opening a new bottle and at regular time intervals.
Legal Information
Titripur is a registered trademark of Merck KGaA, Darmstadt,
Germany
