ABB Navigator 600 Silica - Page 11

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