flairform ph buffer 7 250ml

Flairform pH Buffer 7 250ml PH meters must be regularly calibrated (i.e. adjusted for accuracy) using standard pH buffer solutions which are made to an internationally agreed recipe. Flairforms buffers are formulated with NIST specified ingredients. Stabilised to resist algae or growth formation: Growths can contaminate pH electrodes which in turn affects the slope value beyond the softwares ability to compensate