Calibrating pH meter. A buffer solution with pH=7 is used to calibrate a pH meter. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source / Turtle Rock Scientific |
Taille de l’image : | 3420 px × 5158 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |