pH Buffer Standards
Traditional pH 4, 7 & 10, color coded.
Calitech pH calibrating buffers are formulated with NIST specified
ingredients including EPA registered broad-spectrum antimicrobials to assure long-life
free of mold and bacterial growth. These are color coded for easy recognition. Accuracy
is referenced to NIST Standard Reference Materials ±0.01 pH @ 25°C for routine buffers
and ±0.002/0.005 @ 25°C for high-accuracy buffers. Traceability certificates are
furnished on request. The buffers are packed in 500-mL,1, 4 & 20- liter containers.
All screw capped containers include tamper evident double seal caps to prevent leakage
and security. A convenience dispensing faucet is available as an extra for the 20-liter
cube.. These items are always in stock for prompt shipment. In addition to the routine
pH 4, 7 & 10 buffers, Calitech buffers at pH 1, 2, 3, 5, 8, 9, 11 & 12 are available
on order. Please tell us what you need. These are made to the same exacting standards
as the routine buffers. They are supplied uncolored and are certifiable to NIST
- Routine pH Buffers pH 4, 7 & 10 pH ±0.01 pH @ 25°C. color coded.
- High Accuracy Buffers pH 4, 7 & 10 ±0.002 @ 25°C vs. NIST SRMs.
- High Temperature Buffers pH 2, 4 & 7 ±0.05 pH with zero tempco from 10-99°C.
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