TM
5-822-14/AFJMAN
32-1019
(2) Continue steps 5 and 6 in the procedure as described in Determina-
tion of Sulfate in Soil by Turbidimetric Method.
(3) Draw standard curve as shown in figure C-l by plotting transmis-
sion readings for known concentrations of sulfate solutions.
Figure C-1. Example standard curve for spectrophotometer.
C-3
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