Orthophosphate online analyzer
AMT-PO4500 type orthophosphate online analyzer adopts molybdenum blue spectrophotometry. Under the condition of acidic medium and antimony salt, phospho-molybdenum heteropoly acid produced by the reaction of orthophosphate and ammonium molybdate was reduced to blue complex by ascorbic acid. Its absorbance was measured at 700m wavelength and converted to the corresponding concentration value.
The measurement is stable and the lower limit of quantitative measurement is low.
The liquid reagent has a long shelf life at room temperature.
The measuring range can be extended to 0~5000mg/ son (repeatability is still controlled within 1%) :
The effect of black or colored water samples on measurement was effectively solved.
The recovery of phosphorus can be further improved by UV digestion, making the actual water sample test more accurate (optional).