|
punch-in probes with cone-shaped tip blue: SCHOTT red: INGOLD |
 |
| method | pH is measured directly in the sediment using either punch-in probes (same shape as redox probes) or by ORION flat membrane probes |
| calibration |
immerse probe
in pH 7 buffer solution and adjust offset on pH-meter |
| for alkalinity titration a pH-meter with 10-3 pH resolution should be used |