Study On Detection And Degradation Technology Of Drug Residue Pollution Absorption Spectrometry

With the development of economy and science and technology,people’s quality of life is becoming more and more demanding,especially food and drinking water.As a result,some chemicals are added to food and drinking water to meet people’s needs.However,in order to save costs,some companies have changed some chemical products that are intended to improve people’s quality of life,and changed them to inferior ones.Exceeding the dose strictly prescribed by the relevant departments,and it is the masses who have talked about the chemicals as a “tiger”.In this context,this paper makes in-depth research on the techniques of food additives in fruit juice,antibiotics in drinking water,and pesticide residue detection and degradation in fruit juice:by using the difference in the position of ultraviolet absorption spectral peak,a qualitative analysis of chemical residues can be carried out;using the relationship between the absorption and drug concentration corresponding to the peak,a functional model can be used to make quantitative analysis of chemical residues;based on this,the pesticide residues in fruit juice were degraded in two ways: UV and ozone.The detected spectra were pre-processed,data analysis,and parameter comparison were performed to provide a data basis for drug detection and degradation.The main research content and innovative work of the paper are as follows:(1)Based on UV-Vis absorption spectroscopy,to detect residues of pesticides and food additives in fruit with a concentration of 100% and antibiotics in drinking water,study of the absorbance of the peak corresponding to the absorption spectra of two pesticides(Captan and MCPA-Na)and two food additives(vanillin and cyclamate)in two fruit juices(orange and peach juice)and two antibiotics(cephalosporin and amoxicillin)in drinking water.A functional relationship between the absorbance and the concentration of the chemical,and the correlation coefficient of the established mathematical model calculated by the established mathematical model function are over 0.9.At the same time,the established mathematical function models can be compared and analyzed from the relevant parameters such as the mean recovery,detection limit,limit of quantification,and the relative standard deviation;analysis and processing of the absorption spectra of six samples of Captan-orange juice,MCPA-Na-peach juice,orange juice-vanillin,peach juice-cyclamate,etc.The results show that the original data is processed with smooth noise reduction,the position of the peak of the spectra can be found more accurately,which is more conducive to the accuracy of the mathematical function model and can improve the correlation coefficient.(2)On this basis,derivative processing is performed on the absorption spectra of the six samples processed,and the results also show that the derivative absorption spectra has improved the resolution of the prediction function model and the change of the absorption spectra,eliminating the baseline drift or the interference of background factors critical use.Compared with the original absorption spectra,the detection limit and quantification limit parameters of the derivative absorption spectra are significantly better than the original absorption spectra,and the precision of the function model based on the derivative spectra is better than the original ultraviolet absorption spectra.Based on the above research results,we can conclude that it is feasible to detect residues of pesticides and food additives in fruit juices and antibiotics in drinking water using ultraviolet-visible absorption spectroscopy.The rapid detection of residues in the medium provides a new perspective.(3)Using two degradation technologies of ultraviolet light and ozone,we built two hardware platforms for degradation of pesticides,and proposed to establish a function model based on the absorbance at the peak of the sample and the length of the degradation time,and the correspondence between the degradation time and the absorbance at the peak.The established degradation model function calculates the degradation rate corresponding to different degradation times,and judges the pros and cons of the degradation effect according to when the degradation rate can reach 100%,so as to choose when to degrade.Experiments show that the degradation effect of orange juice-Captan is better than that of peach juice-MCPA-Na,and the ultraviolet degradation of orange juice-Captan is better than ozone degradation.