Enrichment and Analysis of Food Pigments by Ionic Liquids Coated Magnetic Nanoparticles in Magnetic Solid Phase Extraction Coupled with Spectrophotometry

Table of Contents

Abstract

摘要

Chapter One Literature Review

1．2．Food pigments

1．3．Magnetic solid phase extraction(MSPE)technology

1．3．1．Iron oxide(Fe3O4)

1．3．2．Functional materials loaded Fe3O4

1．4．Magnetic solid phase extraction(MSPE)joint technology in different samples analysis

1．5．Methods for Food pigments detection

1．5．1．In chromatography

1．5．2．In electrochemistry

1．5．3．Spectrophotometric Methods

1．6．Magnetic solid phase extraction(MSPE)in food pigment analysis

1．7．This article ideas

References

Chapter Two Determination of Rhodamine B Pigment in Food Samples by Ionic Liquid Coated Magnetic Core／Shell Fe3O4@SiO2 Nanoparticles Coupled with Fluorescence Spectrophotometry

2．1．Introduction

2．2．Experimental

2．2．1．Equipment and Reagents

2．2．3．MSPE Procedure

2．2．4．Determination Method

2．2．5．Sample Preparation

2．3．Results and discussion

2．3．1．Characterization of the MNPs by FT-IR

2．3．2．Characterization of the MNPs by Thermo-gravimetric analysis(TGA)

2．3．2．Extraction efficiency of different MNPs

2．3．4．Optimization of Adsorption

2．3．5．Adsorption Capacity

2．3．6．Optimization of Elution

2．3．7．The reusability of Fe3O4@SiO2@IL

2．3．8．Evaluation of Interferents

2．3．9．Analytical Performance of the Method

2．3．11．Sample Analysis

2．3．12．Comparison of the Proposed Method with Relevant Literatures

2．4．Conclusion

References

Chapter Three Separation／Analysis of Congo Red Using Poly Ionic Liquid Immobilized Magnetic Nanoparticles Coupled with Fluorescence Spectrophotometry

3．1．Introduction

3．2．Experimental section

3．2．1．Reagents and chemicals

3．2．2．Equipment

3．2．3．Preparation of poly(ionic liquid)immobilized magnetic nanoparticles(Fe3O4@SO2@PILs)

3．2．4．procedure of extraction

3．2．5．Sample preparation

3．2．6．Elution procedure

3．3．Results and discussion

3．3．1．Characterization of Fe3O4@SiO2@PIL

3．3．2．Optimization of Adsorption

3．3．3．Optimization of Elution

3．3．4．The reusability of Fe3O4@SiO2@PIL

3．3．5．Interferents effect

3．3．6．Analytical Application

3．3．7．Analysis of sample

3．3．8．Discussion on Adsorption Mechanism of Fe3O4@SiO2@PIL

3．3．9．Comparison with other methods

3．4．Conclusion

References

Chapter Four Poly Ionic Liquid Immobilized Magnetic Nanoparticles as Sorbent Coupled with Fluorescence Spectrophotometry for Separation／Analysis of Allura Red

4．1．Introduction

4．2．Experimental section

4．2．4．Elution procedure

4．3．Results and discussion

4．3．1．Optimization of Adsorption

4．3．2．Optimization of Elution

4．3．3．The reusability of Fe3O4@SiO2@PIL

4．3．4．Interference effects

4．3．5．Analytical performance

4．3．6．Analysis of sample

4．3．7．Comparison with other methods

4．3．8．Discussion of Mechanism

4．4．Conclusion

References

Chapter Five Determination of Rhodamine B in Food Samples by Fe3O4@Ionic Liquids-β-Cyclodextrin Cross Linked Polymer Solid Phase Extaction Coupled With Fluorescence Spectrophotometry

5．1．Introduction

5．2．Experimental

5．2．1．Apparatus and Chemicals

5．2．3．Synthesis of Fe3O4@ILs-β-CDCP

5．2．4．Adsorption／Elution

5．2．5．Sample preparation

5．3．Results and Discussion

5．3．1．Characterization of Fe3O4@ILs-β-CDCP

5．3．2．Optimization of Adsorption

5．3．3．Optimization of Elution

5．3．4．Reuse of Fe3O4@ILs-β-CDCP

5．3．5．Effect of Interferents

5．3．6．Analytical performance

5．3．7．Sample Analysis

5．3．8．Adsorption Mechanism of Fe3O4@ILs-β-CDCP for Rhodamine B

5．3．9．Comparison with other methods

5．4．Conclusion

References

Chapter Six Amino Acid Ionic Liquid Coated Magnetic Core Fe3O4@SiO2Nanoparticles Coupled with UV Spectrophotometry for Separation／Analysis of Congo Red

6．1．Introduction

6．2．Experimental

6．2．1．Equipment and reagents

6．2．4．Sample preparation

6．3．1．Characterization of Fe3O4@SiO2@AAIL

6．3．2．Optimization of Adsorption

6．3．3．Optimization of Elution

6．3．4．The repeated times of Fe3O4@SiO2@AAIL

6．3．5．Interference experiment

6．3．6．Analytical performance

6．4．Sample analysis

6．5．Conclusion

References

Chapter Seven Conclusion and Outlook

List of Publications

Acknowledgements

声明