通过表面增强拉曼光谱（SERS）分析农药残留

发布时间：2021-08-28 14:12

　　表面增强拉曼散射（SERS）被广泛考虑,因为主要的光谱仪具有对不同化合物无破坏性和超痕量发现的能力。这是一种散射技术,可通过使用纳米颗粒（NPs）增强拉曼光谱。不同的研究人员使用不同的NP来增强拉曼光谱。目前的研究是为了快速发现依赖于表面增强拉曼光谱（SERS）的芒果,西瓜和苹果等水果中的农药残留。农药沉积物被用来杀死虫子,并进一步用于扩大收成。水果中的农药残留引起了许多疾病,例如癌症和肺部疾病。滤纸用作吸水擦拭型SERS基材。紫外可见和SEM仪器用于描述银纳米颗粒（AgNPs）。SERS 比其他所有倾向于研究设施检查的检测方法都具有更大的意义。拉曼信号的根本改善基本上被纳米颗粒的底物识别。拉曼光谱中的每个峰都提供了许多有关农药残留的特定信息。通过统计技术分析光谱特征,涉及检测限（LOD）,定量限（LoQ）,（PLSR）偏最小二乘回归,T检验和标准偏差。因此,在这项研究工作中,准备了银纳米颗粒（AgNPs）的制备,合成银纳米颗粒（AgNPs）的结构分析,SERS刮水器的制造,然后分析了水果上的农药残留。结果表明,表面增强拉曼散射技术与弹性且可渗透的SERS基质结合在一起,该基质被用作在... 

【文章来源】：西安科技大学陕西省

【文章页数】：96 页

【学位级别】：硕士

【文章目录】：
ABSTRACT
摘要
1 INTRODUCTION
    1.1 Background and research significance
    1.2 SERS(SURFACE ENHANCED RAMAN SCATTERING)TECHNOLOGY
OBJECTIVES
2 REVIEW OF LITERATURE
    2.1 DETERMINATION OF PESTICIDE RESIDUE BY LC-MS
    2.2 RESIDUAL ANALYSIS BY FT-IR
    2.3 EXPLORATION OF PESTICIDE THROUGH GC-MS AND LC-MS
    2.4 DETECTION OF PESTICIDES BY SERS
        2.4.1 Analysis of pesticides by different analytical techniques
        2.4.2 Drop wipe method used for the finding of pesticide residues
        2.4.3 Residual pesticides in fruits and vegetables
        2.4.4 Analysis of thiram and paraoxon residues
        2.4.5 Solvothermal process
        2.4.6 Production of silver nanoparticle Monolayers
        2.4.7 The Paste and peel off process
        2.4.8 Pressing and peeled-off methodology
    2.5 S-SERS AND T-SERS MFTHOD
    2.6 EXAMINATION OF PHOSMET AND THIABENDAZOLE PESTICIDE
    2.7 RESIDUAL ANALYSIS OF AZINPHOS-MFTHYL, CARBARYL AND PHOSMET
    2.8 ROLE OF POLYURETHANE MICELLES FOR RESIDUAL ANALYSIS
    2.9 PROOF-OF-CONCEPT APPROACH
    2.10 ANALYSIS OF ORGAN OPHOSPHATES,PYRETHROIDS AND NEONICOTINOIDS
    2.11 SURFACE SPRAY PROCEDURE
    2.12 DIRECT PESTICIDE ANALYSIS
    2.13 ONE-STEP MFTHODOLOGY
    2.14 ACETAMIPRID RESIDUAL ANALYSIS
    2.15 NANO INDENTATION MFTHODS
    2.16 NON-WOVEN FABRIC METHOD
    2.17 DETECTION OF PARAQUAT PESTICIDE RESIDUE
    2.18 ASSEMBLING AG-NANOPARTICLES
    2.19 COLUMN MATERIAL-BASED MATERIAL
    2.20 PHORATE AND FENTHION DETECTION
3 MATERIALS AND METHODS
    3.1 BASIC MATERIAL
    3.2 METHODOLOGY
        3.2.1 Sample preparation
        3.2.2 Substrate:
        3.2.3 Raman Measurement
        3.2.4 Synthesis of silver-nanoparticles (AgNPs)
        3.2.5 Preparation of Ag-dendrites on Copper plate
        3.2.6 Smoothing spectrum
        3.2.7 Base line removal
        3.2.8 Normalization
        3.2.9 Multivariate Analysis or Principal Component Analysis
        3.2.10 Data Analysis
4 RESULTS AND DISSCUSSION
    4.1 UV-VIS SPECTRUM OF SILVER NANOPARICLES
    4.2 SCANNING ELECTRON MICROSCOPY (SEM)IMAGES OF SILVER DENDRITES
    4.3 QUANTITATIVE FINDING PROCESS OF PESTICIDES
    4.4 IMAGING DETECTION PROCESS
    4.5 SMOOTHING
    4.6 SUBSTRATE REMOVAL
    4.7 BASELINF CORRECTION
    4.8 VECTOR NORMALIZATION
    4.9 SERS COMPARISON OF SAMPLE 1 AND SAMPLE 2
    4.10 SERS ENHANCEMENT OF LAMBDA-CYHALOTHRIN
    4.11 LOADING/SCORE
    4.12 MEAN SPECTRA OF ALL SAMPLES
    4.13 MFTHOD VERIFICATION
        4.13.1 Detection Limit
        4.13.2 Calibration curves linearity, limit of detection (LOD) and limit of quantification (LOQ)
CONCLUSION
LITERATURE CITED


【参考文献】：
期刊论文
[1]高灵敏银纳米棒阵列对农药啶虫脒的表面增强拉曼散射快速检测（英文）[J]. 韩彩芹,姚悦,王稳,陶刘乾,张雯欣,Whitney Marvella Ingram,田康振,刘莹,陆爱霞,吴莹,闫长春,渠陆陆,李海涛.  Chinese Journal of Chemical Physics. 2018(02)



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