1. Dr Ehrenstorfer

Certified Reference Material for:

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

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