Buffers and Standards
Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.
The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:
- Red: pH 4.0
- Yellow: pH 7.0
- Blue: pH 10.0
Traceable™ Conductivity Calibration Standards Certified Reference Material (CRM), NIST tested, Fisherbrand™
Use NIST-traceable reference materials for the highest accuracy available. Traceable™ Conductivity Calibration Standards Certified Reference Material (CRM) offer easy calibration with included instructions and temperature chart.
Buffer solution pH 4.01 (+/-0.022 @ 25oC) No Color Specpure NIST Traceable
CAS: 1336-21-6 | H5NO | 35.05 g/mol
Buffer solution, pH 2.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable
For Calibration of pH Meters | CAS: 7447-40-7
Buffer solution pH 10.00 (+/-0.024 @ 25oC) Colored Blue Specpure NIST Traceable
CAS: 1336-21-6 | H5NO | 35.05 g/mol
Buffer solution, pH 6.86 (+/-0.024 @ 25oC), No Color, Specpure, NIST Traceable
CAS: 1336-21-6 | H5NO | 35.05 g/mol
Buffer solution pH 7.00 (+/-0.024 @ 25oC) Colored Green Specpure NIST Traceable
CAS: 1336-21-6 | H5NO | 35.05 g/mol
Buffer solution, pH 1.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable
For Calibration of pH Meters | CAS: 7447-40-7
Buffer solution, pH 12.00 (+/-0.01 @ 25oC), No Color, Specpure, NIST Traceable
CAS: 1336-21-6 | H5NO | 35.05 g/mol
Buffer solution, pH 3.00 (+/-0.026 @ 25oC), No Color, Specpure, NIST Traceable
CAS: 1336-21-6 | H5NO | 35.05 g/mol
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