Buffer solution (potassium hydrogen phthalate

For calibration of pH meters. Practical 30 ml sachets - one use per sachet - no risk of contamination Solutions are always fresh and ready to use Traceable to SRM from NIST and PTB Reference temperature: +25 °C Precision: Deviation is max. ±0,015 pH units pH value is measured with a combined glass electrode after 5-point calibration according to DIN 19268 with reference buffer solutions according to DIN 19266, IUPAC, NIST, Ph.Eur. and USP.