Sell New products◊✣3pc PH Test Meter Measure Calibration Solution PH Buffer Powder 4.01/6.86/9.18 best price

Specifications: Included: 1x PH 4.01 1x PH 6.86 1x PH 9.18 Specifications: Included：1x PH 4.01 1x PH 6.86 1x PH 9.18 Features: As this is a powder, in a sealed packet there is no "shelf life". The contents will make up to 250ml each. Just add water or distilled water. pH meter Buffer Solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. ... Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications Material: powder