Microfluidic chip, detection system and detection method for total phosphorus detection

Abstract

The invention discloses a micro-fluidic chip for total phosphorus detection, a total phosphorus detection system and a total phosphorus detection method. The chip comprises a color comparison pond, a micro-channel and a liquid outlet. The micro-channel is communicated to one end of the color comparison pond, and the liquid outlet is communicated to the other end of the color comparison pond. A carrier liquid inlet, a sample inlet, a color developing agent inlet and a reducing agent inlet are sequentially communicated to the micro-channel along the liquid flowing direction. A first mixing micro-channel for promoting liquid mixing is communicated between the color developing agent inlet and the reducing agent inlet. A second mixing micro-channel for promoting liquid mixing is communicated between the reducing agent inlet and the color comparison pond. The first mixing micro-channel and the second mixing micro-channel are zigzag. Online detection can be achieved by the chip, the chip can be exactly inserted into a detection pond of a spectrophotometer due to the structural design, and online total phosphorus content detection is achieved by combination of the chip and the spectrophotometer.

Description

technical field [0001] The application belongs to the technical field of water quality monitoring, and in particular relates to a microfluidic chip, a detection system and a detection method for total phosphorus detection. Background technique [0002] Total Phosphorus (Total Phosphorus-TP) is one of the three routine indicators for water quality monitoring. Phosphorus mainly exists in industrial wastewater and domestic sewage. Excessive total phosphorus will lead to eutrophication of the water body. Accompanied by the abnormal proliferation of algae, their decay and decomposition will consume oxygen in the water body, which will lead to a large number of aquatic organisms dying, water quality deterioration, and even lead to swamping of lakes. [0003] The method for macroscopic detection of total phosphorus in water samples is to react the fully digested orthophosphate with ammonium molybdate in an acidic medium, generate phosphomolybdenum heteropoly acid under the catalys...

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Problems solved by technology

This process is often complicated to operate, time-consuming, and consumes a lot of reagents, which increases the cost of labor and reagents, pollutes the environment, and has many human interference factors, which reduces the detection accuracy.

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