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Reference Standards

Reference Standards

1. Dr Ehrenstorfer

Dr. Ehrenstorfer logo

Dr. Ehrenstorfer ref standards

Certified Reference Material for:

  • Dyes
  • Pharmaceutical & Veterinary Products
  • PCBs
  • PCTs
  • PBBs
  • PAHs
  • US EPA Standard
  • Pesticides & their Metabolites
  • Pesticide Mixes
  • And Many More…


2. Hamilton


Conductivity Standards:

  • Remains stable for a minimum of 1 – 3 years
  • Certificate with calibration document
  • Expiry date shown on every bottle
  • Bottles are permitted to stay open for a total of 60 minutes


pH Buffer Standards:

  • Convenient 250ml or 500ml bottle with built-in calibration compartment
  • Economical, only about 15ml of buffer is used per calibration
  • Certified pH value from a DKD laboratory
  • Traceability to international standards
  • Expiration date on the bottle
  • Immune to micro-organisms

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