Determination of Potassium, Sodium, and Total Alkalies in Portland Cement, Fly Ash, Admixtures, and Water of Concrete by a Simple Flow Injection Flame Photometric System
Figure 2
Schematic diagram of an amplification and data acquisition unit. Resistor R1 = 2 K, R2 = 0–1000 K, amplification gain = 1 + R2/R1.
