Check the listing for details. Biopharm pH Calibration Solution (3) 250 mL Bottles pH 7.0, pH 10.0 and Electrod. Condition: New. Listed at 24.00 USD. Biopharm Buffer Calibration Solution Kit 3-Pack of 250 mL (8.4 fl oz) each pH 7, 10 and Electrode Storage Calibration Standards Color coded NIST Traceable For All pH meters These buffer calibration solutions are suitable for the calibration of all pH meters. Each production lot is manufactured in our own laboratory following carefully controlled written procedures and standardized against NIST standard reference materials (SRM) for high accuracy. The finished product is assigned a unique Lot number and expiration date. These products will have greater than one year shelf life when received. Certificate of analysis and traceability included. NIST Reference CalibratedColor Coded for Easy IdentificationLot Number and Expiration DatedIndividually bagged, 250 ml (8 oz) Poly BottlesFor Pharmaceutical, Academic, Research, and Industrial Labs