Silica Analyzer

Silica Analyzer

Years of experience and innovation in the design as well as successful application of continuous Silica analyzers have been combined with the latest electronics and production technologies.

The 3S colorimeter Silica Analyzer is a compact analytical instrument for online analysis and process monitoring. The colorimeter is based on a color developing chemical reaction that is carried out in the glass measuring cell of the analyzer. The sample, coming from an external reservoir or process stream, is autonomously picked up by the instrument and mixed with the appropriate reagents to allow the reaction to occur. The analyzer uses an LED light source and a photodiode to photometrically measure the developed color intensity (absorption). The absorbance is proportional to the concentration of the chemical component to be measured. The detection limit is in the low ppb range.

Soluble silica reacts with the molybdation in an acidic medium to form a green-yellow colored silico-molybdic acid complex which in turn is converted to a blue complex by addition of the reducing reagent. Oxalic acid is added to minimize phosphate interference. The absorption intensity is proportional to the silica concentration in the sample and is determined at 850 nm.