Silica standard solution, 1 mg/L SiO2 (NIST)
Availability: Order only
Silica standard solution, 500 mL.
Сoncentration 1 mg/L SiO2 .
The use of standard solutions can provide control of the laboratory process, increase confidence, and help provide a clear demonstration of performance to various inspectors, regulatory agencies and clients. One-parameter analysis can be performed on different analyzed samples and concentrations to confirm accuracy.
Silica standard solution (110649) from Hach for one-parameter water analysis. Single Parameter Standard for Analytical Quality Assurance. For testing trace levels of soluble silica in pure and ultrapure water
Quantity: 500 mL.
Summary of method: A number of modifications are necessary to adapt the Low Range Silica method for analyzing trace levels in the Ultra Low Range method. It is absolutely necessary to use the one-inch Pour-Thru Cell and liquid reagents. The Pour-Thru Cell increases the reproducibility of the optics and reduces the instability of the readings that result from moveable sample cells. Liquid reagents produce more reproducible readings and lower blank values by eliminating slight turbidity that may remain with powdered reagents. Silica and phosphate in the sample react with molybdate ions under acidic conditions to form yellow silicomolybdic acid complexes and phosphomolybdic acid complexes. Addition of citric acid destroys the phosphate complexes. Amino Acid F Reagent is then added to reduce the yellow silicomolybdic acid to an intense blue color, which is proportional to the silica concentration. The measurement wavelength is 815 nm (DR1900: 800 nm).
|Application area||Environmental monitoring, Wastewater, Drinking water, Laboratory analysis|
|Type||Standard solutions - one-parameter analysis|
|Industry||Ecology, Pulp and paper, Pharmaceutical, Glass, Power generation, Transport, Chemical, Food and Beverage, Municipal|
|Concentration||1 mg/L SiO2|