Why is the Citric Acid turning milky in appearance on my Series 5000 Silica Analyzer?
Series 5000 and citric acid
The reagents must be stored at temperatures above 10°C (50°F) and below 40°C (104°F). If stored outside of that range, the citric acid may polymerize and become milky. At that point, we do not recommend that it is used in the analyzer.