MONITOR PROCESS PHOTOMETRY
No. 00041-2R/N
NITRATE : Chromotropic Method Range: 0 – 30 mg/L ( N- NO3 )
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PRINCIPLE
The automated procedure for the determination of Nitrate in water and waste-water depends on the reaction of nitration of chromotropic acid in condition of high acidity. Two moles of NO3 react with one mole of chromotropic acid to form a yellow reaction product . Antimony ( Sb) is add to the first reagent to masks interference of chloride. The color intensity is measured at 450 nm |
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