1.07294
Buffer solution
di-sodium hydrogen phosphate/potassium dihydrogen phosphate, traceable to NIST, traceable to PTB, pH 6.88 (20 °C), Certipur®
Synonym(s):
di-sodium hydrogen phosphate/potassium dihydrogen phosphate buffer, pH 6.88 calibration standard solution
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About This Item
grade
certified reference material
Quality Segment
agency
traceable to NIST, traceable to PTB
product line
Certipur®
composition
di-sodium hydrogen phosphate/potassium dihydrogen phosphate
pH
6.88 (20 °C)
application(s)
environmental
food and beverages
general analytical
industrial qc
pharmaceutical
format
mixture
storage temp.
15-25°C
General description
The ready-to-use Certipur® buffer solutions are prepared gravimetrically in our ISO/IEC 17025 accredited calibration laboratory from high-purity salts, acids and bases diluted in high-purity water. All balances are regularly calibrated with analytical weight sets traceable to primary standard reference materials from NIST and PTB. The pH-value is measured to the highest precision using a combined glass electrode after 5-point calibration (according to DIN 19268) against reference buffer solutions (according to DIN 19266, IUPAC, NIST, Ph.Eur. and USP).
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.
Features and Benefits
- Compliant: Produced according to EP and USP guidelines
- Secure: Tested in our ISO 17025 accredited calibration laboratory
- Ready for audits: Detailed certificate of analysis for every product
- Convenient: Simply open the pack for quick, accurate pH calibration
Legal Information
1 of 1
This Item | |||
|---|---|---|---|
| description di-sodium hydrogen phosphate/potassium dihydrogen phosphate, traceable to NIST, traceable to PTB, pH 6.88 (20 °C), Certipur® | description (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) Certipur® | description (citric acid/sodium hydroxide) traceable to SRM from NIST and PTB pH 5.00 (20°C) Certipur® | description (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur® |
| format mixture | format mixture | format mixture | format mixture |
| 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 | application(s) environmental | application(s) environmental | application(s) environmental |
| agency traceable to NIST, traceable to PTB | agency - | agency - | agency - |
| Quality Level 300 | Quality Level 300 | Quality Level 300 | Quality Level 300 |
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Storage Class
12 - Non Combustible Liquids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
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