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
Thermo Scientific™ Orion™ pH Buffer Bottles
Perform accurate, reproducible pH calibrations with these color-coded buffer bottles.
pH Buffers, Twin Neck, Fisherbrand™
Perform accurate pH calibrations with color-coded, twin neck Fisherbrand™ pH Buffer Bottles.
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Thermo Scientific™ Orion™ All-in-One™ pH Buffer Kits
Work with ease using this color-coded pH buffer kit that includes three buffers, storage solution and a storage bottle.
Buffer Solution pH7.00 (Phosphate), NIST Standard Solution ready to use for pH measurement, Fisher Chemical™
MDL Number: 217672
Traceable™ ISO 17034 (formerly ISO Guide 34) Color-Coded CRM pH Buffers (Certified Reference Material), Fisherbrand™
Performs accurate, reproducible pH calibrations with color-coded bottles. Fisherbrand™ Traceable, Color-Coded buffers are Certified Reference Material pH Buffers.Compatible with all makes of pH instruments and electrodes.
Buffer Solution pH4.00 (Phthalate), NIST Standard Solution ready to use for pH measurement, Fisher Chemical™
MDL Number: 217672
Mettler Toledo™ Buffer Solutions: Standard pH
Storage and refill solutions for pH electrodes
Technical pH Buffer Solutions, METTLER TOLEDO™
Provides a reliable all-around pH buffer. Mettler Toledo™ Technical pH Buffer Solution are specified to two decimal places and are traceable to NIST standards. Color-coded solution comes in a handy 250mL plastic bottle with no-fuss labels.
Mercury Free Color Coded Buffer Solution pH 10 at 25 °C, Reagecon
Guaranteed stability throughout entire shelf life even after opening the bottle, NIST traceable