pH Buffers

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Hach calibration pH buffers are available as various color-coded or colorless solutions, in different packaging types and different packaging sizes ranging from 15 mL to 20 L. pH buffers are also supplied in convenient, single-use sachets (Singlet) and unit-dose powder packets designed for use in facility or field analyses, keeping materials fresh and eliminating the possibility of contamination. All Hach pH buffers are traceable to NIST within an accuracy range of ±0.02 pH at 25°C for optimum pH electrode calibration. For all Hach buffers, a special Certificate of Analysis is available that can be downloaded from www.hach.com: Support/Service, Certificate of Analysis menu using the product part number and batch number.

For critical applications and metrology requirements, Hach offers Standard IUPAC pH Buffer Solutions with a Conformity and Traceability Certificate provided by our Accredited Laboratory (www.hach.com/coa). The certificate shows the full pH buffer value along with the associated expanded uncertainty value (k=2). pH Buffer Solutions are traceable to the IUPAC/NIST pH scale. They have a very long shelf life thanks to high-quality aluminum packaging.