ABB Navigator 600 Silica User Manual page 11

Navigator 600 Silica
Single-stream
molybdosilicic acid complex
0.8 to 1.0 pH providing reducing conditions
to stop formation of yellow complex
1.4 to 1.8 pH providing conditions for the
production of yellow ß-molybdosilicic acid
Fig. 3.1 Chemical Schematic
IM/NAV6S/SS–EN Rev. E
Reacted sample to optical unit
Production of blue
Sample
Auto-zero valve
Temperature controlled at 45 ° C (167F)
1 Minute
Reduction Solution
2 Minutes
Second Acid
2 Minutes
Molybdate
First Acid
3 Principle of Operation
9