Accurate and stable buffers for pH and redox electrode calibration.

  • Guaranteed stable for 5 years
  • Unique, time saving CALPACKTM dosing bottle
  • Automatic buffer recognition with a majority of pH meters
  • Certified, traceable to N.I.S.T.

Item# Description U.S. List Price Quantity
69-0083 Duracal™ Buffer, pH 4.01 ±0.02, one 500 mL bottle, red solution
69-0084 Duracal™ Buffer, pH 7.00 ±0.02, one 500 mL bottle, green solution
69-0085 Duracal™ Buffer, pH 9.21 ±0.02, one 500 mL bottle, blue solution
69-0086 Duracal™ Buffer, pH 10.01 ±0.02, one 500 mL bottle, yellow solution
69-0088 Duracal™ Buffer, pH 4.01 ±0.02, three 500 mL bottles, red solution
69-0089 Duracal™ Buffer, pH 7.00 ±0.02, three 500 mL bottles, green solution
69-0090 Duracal™ Buffer, pH 9.21 ±0.02, three 500 mL bottles, blue solution
69-0091 Duracal™ Buffer, pH 10.01 ±0.02, three 500 mL bottles, yellow solution
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Accurate, stable buffers are critical for the calibration of pH and redox electrodes to achieve accurate measurements, particularly with modern pH meters incorporating GLP functions for recording electrode performance.

DURACAL Buffers are buffer solutions you can trust. They offer you many advantages over traditional buffer solutions including guaranteed stability (excellent stability of even pH 9.21 in air) and automatic buffer recognition so you use the correct buffer to calibrate. All of this in a unique time and money saving dispenser bottle.

The unique, easy-to-use, CALPACK™ dispensing bottle allows electrode calibration in the buffer bottle without contamination. In 4 easy steps, calibration is complete.

  • Dispense only the required quantity of buffer for calibration, no wasted buffer
  • No more searching for suitable containers
  • No more cleaning
  • No more risk of contamination

Duracal Buffers are guaranteed for 5 years from the date of production. During this time they retain a high buffer capacity for fast, stable calibrations. The pH 7.00 buffer is less sensitive to ions while the pH 9.21 buffer provides stability superior to conventional buffers.

The composition of DURACAL Buffers has been optimized so the temperature function is similar to that of conventional buffers. This guarantees that the automatic buffer recognition of most pH meters can be used without any problems.

Duracal Bufer Red Green Blue Yellow Gray
(Redox Buffer)
pH 4.01 ± 0.02 7.00 ± 0.02 9.21 ± 0.02 10.01 ± 0.02 465 mV ± 5mV