[Did Not Converge Error - Charge Balance]

Hello!

 

I am struggling to understand my results from Spec8. I have 10 samples and am trying to get charge balances and Saturation Indices.

 

All the chemistry is quite similar between samples, however I only get results from 3 out of 10 of the samples. For the rest I get

 

N-R didn't converge after 999 its., maximum residual = 0.451, Xi = 0.0000

I attached my spread sheet below in hopes that someone smarter than me could figure out where I am going wrong!!

Thanks so much!!

Shona

GSS Column FEED.gss