Residual chlorine sensor chip and residual chlorine detection method

Abstract

The invention discloses a residual chlorine sensing chip and a residual chlorine detection method. The residual chlorine sensing chip comprises a hollow photonic crystal fiber, one end of the hollow photonic crystal fiber is connected with an external photoelectric detector through an optical fiber while the bottom end face of the other end is a reflective face, and one end of the hollow photoniccrystal fiber is provided with a light source coupling port. The hollow photonic crystal fiber is externally provided with a color developing agent cavity, a mixed reaction cavity and a solution recovery cavity in sequence along the length direction. The color developing agent cavity is internally provided with a color developing agent micro-fluidic tube; the mixed reaction cavity is internally provided with a micro-fluidic chip, and the micro-fluidic chip is provided with a micro-fluidic channel communicated with the interior of the hollow photonic crystal fiber. The micro-fluidic channel isprovided with a color developing agent inlet and a water sample inlet, the color developing agent inlet is communicated with the color developing agent micro-fluidic tube, and the water sample inlet is connected with a water micro-fluidic tube. The solution recovery cavity is provided with a flow guide tube, and the flow guide tube is communicated with the interior of the hollow photonic crystal fiber.

Description

technical field [0001] The invention relates to the field of residual chlorine detection in tap water, in particular to a residual chlorine sensor chip and a residual chlorine detection method for on-line rapid water quality residual chlorine analysis. Background technique [0002] Residual chlorine refers to the effective chlorine remaining in the water after the water has been chlorinated and disinfected for a certain period of time. It exists in the water body in the form of hypochlorous acid, hypochlorite ion, elemental chlorine, and compounds. The role of residual chlorine is to ensure continuous sterilization and also to prevent water from being re-polluted. However, if the residual chlorine exceeds the standard, it will aggravate the odor and taste produced by phenol and other organic substances in the water, and may also generate organic chlorinated substances such as chloroform that have "three causes" effects. It will directly cause damage to human respiratory sys...

AI Technical Summary

Problems solved by technology

Although the electrode method can quickly analyze the residual chlorine in water quality online, the diaphragm electrode needs to replace the permeable membrane regularly, which is cumbersome to maintain and increases the cost, while the open electrode must be measured in water with a fixed flow rate, which is generally used in practical applications. A matching flow cell is required, so the electrode method is not good enough in terms of practicality

Traditional spectrophotometry takes more samples and requires special equipment, which is expensive

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