HI77400P pH 4.01 and 7.01 Calibration Buffer Sachets (10 x 20mL, 5 Each)

HI77400P 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 @ 25C and are traceable to NIST Standard Reference Materials (SRMs).Features: – 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
– Hanna buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened sachet.- Easy to identify different buffer values- Solution does not contain any dyes that may stain the reference cell of a pH electrode