微流控技术作为一门新兴的技术，由于其高通量和微型化等特点，不仅能降低检

As an emerging technology, microfluidic technology can not only reduce the detection time and sample consumption, but also improve the detection accuracy of samples due to its high-throughput and miniaturization characteristics. It has penetrated into various research fields. The development of microfluidic technology is becoming more and more mature, and the corresponding detection technology has also obtained rapid development. Traditional detection methods require built-in electrodes, high-voltage electric or magnetic fields, etc. Because the size of the flow channel and reaction cell in the chip is generally on the order of micrometers to millimeters, it makes the placement of macroscopic detection devices more difficult, and optics, chromatography, etc. The micro-detector is still in the research stage, so it is difficult to realize the miniaturization of the microfluidic quick detector, which brings difficulties to the popularization and promotion of the microfluidic. With the development of image technology, the method of using image methods to detect samples in the microfluidic chip reaction cell has become a new research method. This method does not require modification of the microchannel and will not cause secondary pollution to the sample. , Only the optical camera can complete the detection of the sample composition. The paper applies image technology to the detection technology of microfluidic chips, realizes the detection of sample concentration based on the principle of biochemical color reaction, and develops the practical application research of the detection of nitrite nitrogen concentration. The main work of the thesis is as follows:

Microflow control technology as a new technology, because of its high volume and miniaturization and so on, not only can reduce the detection time and sample consumption, but also improve the detection accuracy of samples, has penetrated into various research fields. The development of microflow control technology is becoming more and more mature, and the corresponding detection technology has been developed rapidly. Traditional detection methods require built-in electrodes, high-voltage electric field or magnetic field, because the size of the channel and reaction pool in the chip is generally micron to millimeter scale, which increases the difficulty of macro-detection devices, while optical, chromatography and other micro-detectors are still in the research stage, so it is difficult to achieve microflow control fast detector miniaturization, to the popularization and popularization of microflow control has brought difficulties. With the development of image technology, the method of detecting samples in the reaction pool of microflow control chip by image method has become a new research method, which does not need to be modified for microchannels and does not produce secondary contamination of samples. In this paper, the image technology is applied to the detection technology of microflow control chip, the sample concentration detection based on the principle of bio-chemical coloration reaction is realized, and the practical application of nitrite nitrogen concentration detection is carried out. The main work of the paper is as follows:

As a new technology, microfluidic technology has been infiltrated into various research fields because of its high throughput and miniaturization, which can not only reduce the detection time and sample consumption, but also improve the detection accuracy of samples. The development of microfluidic technology is becoming more and more mature, and the corresponding detection technology has also been developed rapidly. Traditional detection methods need built-in electrodes, high voltage electric field or magnetic field. Because the size of the channel and reaction pool in the chip is generally from micrometer to millimeter, it is difficult to put macro detection devices into the chip. However, the micro detectors such as optics and chromatography are still in the research stage, so it is difficult to realize the miniaturization of microfluidic fast detector, which brings difficulties to the popularization and popularization of microfluidic hard. With the development of image technology, the method of image detection for samples in microfluidic chip reaction pool has become a new research method. This method does not need to modify the microchannel, and will not cause secondary pollution to the sample. Only through optical camera, the sample composition detection can be completed. In this paper, the image technology is applied to the micro flow control chip detection technology, which realizes the sample concentration detection based on the principle of biochemical color reaction, and carries out the practical application research of nitrite nitrogen concentration detection. The main work of this paper is as follows<br>