[zeoblade]

I'm having trouble interpreting what the steps for both the Guggenheim and Kezdy-Swinbourne methods need in order to transform my data into something useful.

The physical parameter being used is Absorbance and the Guggenheim formula I believe is: ln (A'n - An) = constant - k.tn
where An is the nth Absorbance reading
A'n is the nth Absorbance reading of a new series
tn is the nth time reading

When Guggenheim refers to A'n, what and where does this value come from? I understand it to be the absorbance reading directly after the half-life. Therefore, there will be a (A - A') pair until the last reading giving the pair (An - A'n).

If this is true, what am I supposed to do with t? Do I plot ln (A'n - An) on y-axis and (t + t') on x-axis?

The Kezdy-Swinbourne method I interpret to be I plot A on x-axis (or y-axis?) against A' on y-axis (or x-axis?)
Then I take ln of the slope where ln(slope) = kdt
dt is the half-life which I already know from taking my A' values from the A-values starting at the half-life so rearranging the equation:
k = ln(slope)/dt
This is to be a more accurate measure of a pseudo-rate constant?