Water quality detecting method and micro-fluidic chip special for water quality detecting method

Abstract

The invention discloses a water quality detecting method and a micro-fluidic chip special for the water quality detecting method. The micro-fluidic chip comprises an upper-layer cover plate (1), a middle layer (2) and a lower-layer gasket (3) which are overlapped in sequence and in seal fit, wherein a sample feeding hole (4) is formed in the upper-layer cover plate (1); the middle layer comprises a sample feeding tank (5), a reaction chamber (6) and a residual liquid chamber (7); the sample feeding tank (5) and the sample feeding hole (4) are communicated and are corresponding in position; the sample feeding tank (5) and the residual liquid chamber (7) are communicated through a main micro channel (8); the main micro channel (8) extends outwards to form multiple pairs of branch micro channels (10), and the end part of each branch micro channel is communicated with the reaction chamber (6); the lower-layer gasket (3) is made of a transparent material. The micro-fluidic chip can be conveniently used by people, and facilitates the ' Internet +' popularization; a color development chip is separated from a detection device, and is easy to integrate with mobile equipment and Internet of Things; the multi-index detection can be realized.

Description

technical field [0001] The invention relates to a water quality detection method and a special microfluidic control chip thereof, belonging to the technical field of water environment monitoring. Background technique [0002] Water quality index is an important parameter used to evaluate the characteristics and functionality of water samples. According to the water quality index, the water quality can be graded and classified, and the risk can be evaluated and appropriate treatment can be carried out. At present, my country's water quality indicators have formed a relatively complete system, including surface water, groundwater, urban drainage, industrial wastewater and other fields, which are of great significance to environmental protection, water conservancy engineering, biological treatment and other fields. [0003] Water quality indicators mainly include physical indicators and chemical indicators, among which chemical indicators reflect the load state of the environme...

AI Technical Summary

Problems solved by technology

On the one hand, the portability of the instrument is not good, or the performance of the portable photometer is not high (for example, lack of ultraviolet range, etc.), when testing the water quality in the field, it is necessary to take enough water samples to preserve and package, and then bring them back to the laboratory for further analysis; The operation process of the color method is relatively complicated, and it takes half an hour to start and warm up the equipment (mainly referring to the spectrophotometer), which affects the efficiency of the experimental analysis; finally, the consumption of reagents is also relatively large, and only one index can be measured at a time. relatively low

[0005] Portable photometers of commercial brands (such as Hach, WTW, etc.) adopt the standard colorimetric tube method, which can measure a variety of water quality indicators. The disadvantage is that it needs to carry a battery or a portable power supply, and the volume is relatively large and the cost is high.

In addition, there are still problems such as large volume of prepacked test tubes, high consumption of reagents, and troublesome waste liquid treatment.

Online water quality measuring instruments can continuously sample and measure, but they are generally single-indicator instruments that cannot measure multiple indicators at the same time, and are expensive, difficult to move, and require continuous maintenance, so they are not suitable for portable mobile testing.

In many recent technical improvements, the mode of using a spectral detector to measure absorbance in situ still has not been jumped out, so it is impossible to realize Internet+ functions such as miniaturization of equipment, cheap products, and popularization of products.

[0006] The Internet of Things technology requires a large number of miniaturized and cheap sensors. The above-mentioned laboratory instruments, portable instruments, and online detection equipment cannot meet the requirements of the Internet of Things for sensors.

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