Microcoulomb bias problem
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Dear fellow marine scientist, microcoulomb salt-containing instruments often fail to achieve the bias voltage required for sample analysis. It is far from the normal bias voltage; the measured bias voltage is always on the low side. The same is true when changing the electrolyte; both the measurement electrode and the anode electrode have been replaced, but the results remain inconclusive.
Is the electrolyte you use of ultra-pure quality? It’s a problem with the electrolyte; we’ve encountered this issue as well. The new electrolyte we installed doesn’t work, while the old one does, so we suspect that the electrolyte is fake.
Prepare it using glacial acetic acid from Sinopharm and purified water from Wahaha. It’s also possible to let the instrument perform reverse electrolysis slowly! If that doesn’t work, add some calibration samples to apply the bias voltage!
The main reason is the issue with the water used for preparing the electrolyte; it does not meet the required standards, so it is best to use Wahaha water