How to calculate error on log(MW) and error on MW for an SDS-PAGE calculation?

  • #1
I have found my LINEST equation for my standard curve, which is
where y=log(MW)
AND x= Rf
y=-1.392047709x+2.324113743

as well, my imageLab gives me:
Relative Front (Rf) = 0.087
error on Rf=0.005

I can calculate my log(MW) by inputing my Rf into x value of the equation
y=-1.392047709(0.087)+2.324113743
y=2.203

and my MW can be found by taking it out of log

MW = 10^(2.203)
MW=159.58Da

Now, I want to find my error on the log(MW) and MW,

i think this two part equation will work, but i am unsure

Screen Shot 2021-12-07 at 11.43.03 AM.png
Screen Shot 2021-12-07 at 11.43.15 AM.png
 

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