Water quality fluoride detection method based on digital image colorimetric analysis

Abstract

The invention discloses a water quality fluoride detection method based on digital image colorimetric analysis. The xylenol orange zirconium system is used for replacing a fluorine reagent in a national standard method, and the method has the advantages of being few in used reagent, low in cost, rapid in color development, high in sensitivity, good in stability and the like; according to the invention, MSRCR image enhancement is carried out on a digital image acquired based on a CCD industrial camera, so that the influence of low image brightness can be effectively reduced; according to the method, multi-dimensional color feature extraction is utilized, the Lab color first moment is utilized, color space distribution and pixels can be considered, image information can be better reflected, and the robustness of the established multiple linear regression quantitative analysis model is higher. The method has the advantages of wide detection range, convenience in operation, higher accuracy and precision, simple image acquisition equipment, easiness in carrying and convenience in field measurement.

Description

technical field [0001] The invention relates to the technical field of fluoride detection in water quality, in particular to a water quality fluoride detection method based on digital image colorimetric analysis. Background technique [0002] Fluorine is a non-metallic chemical element ubiquitous in the environment, widely present in soil, rocks and water in nature. As one of the 14 kinds of trace elements necessary for the human body, it is an indispensable and important part of bones and teeth. In daily life, people obtain fluorine through drinking water and food, and 65% of the fluorine contained in the human body is obtained through drinking water. Insufficient absorption of fluoride by the human body is one of the factors leading to dental caries, but excessive absorption, fluorosis, will cause great harm to the human body. Typical symptoms are dental fluorosis and bone fluorosis. Therefore, the detection of fluoride in natural water has important practical significan...

AI Technical Summary

Problems solved by technology

Among them, the fluorine reagent spectrophotometry has high detection accuracy and precision, good reproducibility, low detection limit, and good stability. There are many chemical reagents and poor equipment portability; the electrode method is fast and reproducible, but it is easily affected by the pH and impurities of the water sample, and it is difficult to select the electrode and judge the aging degree of the electrode; visual colorimetry The method relies on subjective judgment, the accuracy is not high, and it cannot meet the requirements of online detection of fluoride in water quality; although the ion chromatography method has the highest accuracy and precision, the cost of the instrument is high, and the operation and maintenance costs are high, which is not conducive to popularization and use.

[0004] Digital image colorimetry is a new colorimetric analysis method emerging with the development of scanners, digital cameras, smartphones and other imaging equipment. It has the advantages of low cost, less time-consuming, and simple operation, and has been widely used in Life science, biology, chemical analysis, biomedicine and other fields, but rarely used in the field of water quality detection

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