TP type total phosphorus online analyzer

TP type total phosphorus online analyzer

Working Principle:Persulfate oxidationAmmonium molybdate spectrophotometric method

• When analyzing total phosphorus, the sample is first mixed evenly with potassium persulfate and subjected to sealed high-temperature and high-pressure digestion,

Oxidation of all phosphorus present in various forms in the sample to orthophosphate;

• When conducting orthophosphate analysis, this digestion step is omitted;
• In an acidic medium, orthophosphate reacts with ammonium molybdate and potassium antimony tartrate to form phosphomolybdic acid compounds;
• The phosphomolybdic acid compound is reduced to a blue complex by the reducing agent ascorbic acid, and the color of the complex is directly proportional to the phosphorus content in the sample;
• The absorbance value of the reaction product is measured by photometry to obtain the phosphorus content in the sample. The measurement principle of the instrument fully complies with the national standard "Determination of total phosphorus in water quality - Ammonium molybdate spectrophotometric method" (GB/T11893-89).

Instrument features:

1. Accurate measurement and wide applicability

• High resolution multi position valve with a minimum quantitative volume of 1mL;
• Automatic chromaticity and turbidity compensation algorithm, fully considering the actual water sample situation on site, with monitoring results that are true and reliable;
• A customized pre-treatment sampler for total phosphorus monitoring uses a homogenizer to crush suspended particles, and filters them through coarse, fine, and multi-stage filters, combined with automatic blowback and automatic cleaning, to ensure good representativeness of the sample while avoiding blockage of the pipeline by large suspended particles.

2. Reliable overvoltage and over temperature protection devices provide users with safer and more reassuring use.