Hi Ya'all;

Ole Bob, made an error in calculating the 200 and 400 to 1 dilution PPM.

Thanks to James Holman for raising a question I discovered that in
multiplying the
data I got into the wrong column and used the "absorbency" rather than
the "concentration".

The data should read  100/1 = 63 ppm

200/1 = 56 ppm

400/1 = 48 ppm

Shame on me. I never claimed to be infallible !!!!!!!

Robert



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