Close-up of a scientist's gloved hands using a digital pH meter to measure the pH of a chemical solution. The tip of the probe is immersed in to the liquid and measurements are taken to determine its pH. A pH reading below 7 is acidic, one above 7 is alkaline, while a pH of 7 is neutral. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / SCIENTIFIC PICTURE RESEARCH |
Bildgröße: | 5653 px × 3769 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | vorhanden |
Restrictions: | - |