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1.19898 Supelco

Phosphate standard solution

traceable to SRM from NIST KH₂PO₄ in H₂O 1000 mg/l PO₄ Certipur®

Synonym: Phosphate standard for aqueous matrices ready for use

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Properties

Related Categories Additional Standards, Analytical Standards, Analytical/Chromatography, Chromatography, Ion Chromatography Standards,
Quality Level   100
application(s)   ion chromatography: suitable
density   0.998 g/cm3 at 20 °C
storage conditions   Store at +15°C to +25°C.

Description

Analysis Note

Concentration     β (PO₄³⁻): 990 - 1010 mg/l
Determination method: Alkalimetric titration.
The content of this solution was determined with sodium hydoxide standard solution (article number 1.09141) standardized against volumetric standard potassium hydrogen phthalate (article number 1.02400). The expanded measurement uncertainty is ± 0.4 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 84L (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard potassium hydrogen phthalate, measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.

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