Flow injection surface-enhanced Raman spectroscopy detection device and method for determining copper in water

Abstract

The invention relates to a device for detecting copper in water body by flow injection surface enhanced Raman spectroscopy. The technical scheme is as follows: the device is composed of a surface enhanced Raman spectroscopy detection room (8), a Raman spectroscopy system (12), a control device (14), a data processing system (13), a sample peristaltic pump (3), a complexing agent peristaltic pump (5) and a hydrochloric acid solution peristaltic pump (6), wherein the surface enhanced Raman spectroscopy detection room (8) is connected with the sample peristaltic pump (3), the complexing agent peristaltic pump (5) and the hydrochloric acid solution peristaltic pump (6) by pipelines respectively, the surface enhanced Raman spectroscopy detection room (8) is connected with the data processing system (13) and the control device (14), and the surface enhanced Raman spectroscopy detection room (8) is provided with a temperature control device. The invention also discloses a detection method of the detection device.

Description

technical field [0001] The invention belongs to the field of copper detection methods in water bodies, and specifically relates to an on-site, fast and sensitive flow injection surface-enhanced Raman spectrum detection device and a detection method for copper in water bodies. Based on the fact that the cyclodextrin molecules adsorbed on the nano-gold colloid can produce surface-enhanced Raman effect, the complex produced by copper and 4-aminothiophenol in water can reduce the Raman effect produced by the cyclodextrin molecules adsorbed on the nano-gold colloid. The intensity of the surface-enhanced Raman peak, and the degree of reduction of the intensity of the surface-enhanced Raman peak has a linear relationship with the concentration of copper in the water. Using the flow injection technology, the surface-enhanced Raman peak intensity generated by the blank solution and the measured water sample Differential Methods for Measuring Copper in Water. Background technique [...

AI Technical Summary

Problems solved by technology

The common features of these methods are that expensive instruments are required, the operation is complicated, the duration is long, and specialized technicians are required to complete, the consumption of reagents is large, and some methods also introduce harmful organic solvents to varying degrees, resulting in secondary pollution.

At the same time, most methods require expensive and large-scale instruments. In addition, the method adopts the mode of on-site sampling and laboratory analysis, that is, on-site and real-time measurement cannot be realized, and other interfering substances are easily introduced during sample transportation and processing, which affects the accuracy of analysis. sex

Therefore, it is impossible to guarantee that there will be no possibility of secondary pollution for the analysis of trace elements in this process, and for complex and changeable water environment, for example: element forms are greatly affected by time and space; most of them are interrelated and interact The state of the environment; the temperature and pressure changes greatly in the environment, the accuracy and reliability of the results are questioned, so it is impossible to accurately grasp the current status of water quality and its abnormal changes

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