HI77400C – 7.01+ 4.01 pH@25°C – SQ Zert. – je 5x20ml COMBO

HI77400C is a set of premium quality pH 4.01 and 7.01 calibration buffers produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers. Reported values are accurate to +/- 0.01 pH @ 25°C and are traceable to NIST Standard Reference Materials (SRMs). The HI77400C is supplied with Certificate of Analysis Product code Lot number Mean lot value SRMs that were used Manufacturing date Expiration date Convenience of individual packaging Ideal for users that do not calibrate frequently Ideal for field use due to portability Every sachet is as fresh as the day it was packaged Light block packaging prevents oxidation from UV light that could alter the buffer value Each sachet marked with lot number and expiration date. Hanna buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened sachet.