DuraCal® pH Buffer Solutions, color-coded

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The DuraCal® pH buffer family offers the advantages of high stability, high resistance against contamination, easy handling, and long lifetime. Additionally, DuraCal buffers provide features that are common to Secondary Reference Solutions, namely low uncertainty, and a documented traceability to international standards.
Accuracy of Sigma-Aldrich buffer solutions at 20 ºC is as follows:
  • Buffer solutions with pH values 1-9: ± 0.02
  • Buffer solutions with pH values 10-13: ± 0.05

Available are: Buffers containing a fungicide additive; standard buffer solutions according to DIN 19266 for precision measurements and to calibrate pH meters; color coded buffer solutions for different pH values.