Question 1:
When I'm measuring redox with a calomel reference probe, platinum wire, and a voltmeter, do I record the numbers as is (+ or -) and then make the corrections?
I was confused because one of my classmates told me the values we measure out in the field should all be negative. I have been getting more negative values from the voltmeter than positive, but according to my friend, I needed to change any positive readings to negatives and then plugged that value into the equation below:
EhSystem = EhObserved + EhReferenceStandard -
EhReferenceObserved + EhFieldCorrection
Example values respectively:
183 177 240 -28
which yield "EhSystem" = 218
Question 2:
For a sulfate reducing condition, what is the approximate mV range?
Thank you in advance.