Compared with similar products, this product has higher accuracy, lower failure rate, lower maintenance amount, lower reagent consumption and higher cost performance.
1-Selecting valve assembly: Selecting reagent sampling time sequence, flexible and diverse channels, changing functions, easy maintenance and long service life.
2-Micro metering component: Realize accurate metering of reagents through visual photoelectric system, overcome the quantitative error caused by wear of peristaltic pump tube; At the same time, the accurate quantification of trace reagents is realized, and each dose is only 1 ml, which greatly reduces the amount of reagents used.
3-Sample injection assembly: Peristaltic pump suction, there is always an air buffer between reagent and pump pipe, which avoids the corrosion of pump pipe; At the same time, the reagent mixing is more concise and flexible.
4-Sealed digestion assembly: high temperature and high pressure digestion system, accelerate the reaction process, overcome the corrosion of corrosive gas volatilization to equipment in open system.
5-Reagent tube: Imported modified PTFE transparent hose with pipe diameter greater than 1.5 mm, which reduces the blockage probability of water sample particles.
Fundamental principles
The mixed solution of water sample, catalyst solution and strong oxidant digestion solution is heated to 120 DEG C, Polyphosphate and other phosphorus-containing compounds in water samples are digested and oxidized by strong oxidant under acidic conditions at high temperature and high pressure to form phosphate. In the presence of catalyst, phosphate ions form a colored complex in strong acid solution containing molybdate.