Skip to main content

Advertisement

Log in

Detection of Three Different Estrogens in Milk Employing SPR Sensors Based on Double Signal Amplification Using Graphene

  • Published:
Food Analytical Methods Aims and scope Submit manuscript

Abstract

A double signal enhanced surface plasmon resonance (SPR) biosensor system was developed, which involved graphene-based magnetic dispersion solid-phase extraction (MDSPE) and carboxylated graphene oxide (GO-COOH) materials as amplifying elements in order to achieve real-time determinations of estradiol (E2), diethylstilboestrol (DES), and bisphenol A (BPA) via an indirect competition method. In this work, the graphene-based MDSPE materials were synthesized using the chemical co-precipitation method, with a maximum enrichment efficiency of 500 times. To improve the detection sensitivity, the complete antigen (E2-BSA, DES-BSA, and BPA-BSA) was conjugated on the GO-COOH-modified gold chips for signal amplification. Furthermore, the GO-COOH materials could also significantly improve the performance and stability of the immobilized E2-BSA, DES-BSA, or BPA-BSA conjugations. Real-time SPR signals were obtained while mixing the targets (E2, DES, BPA) with anti-target monoclonal antibodies (E2-mAb, DES-mAb, BPA-mAb) at a 1:1 volume ratio. After optimizing the experimental conditions, the minimum detection limits (LOD) of E2, DES, and BPA were 3.605 × 10−6 ng/mL, 2.901 × 10−6 ng/mL, and 5.169 × 10−5 ng/mL, respectively. This simple, accurate, and stable method combined the advantages of two types of graphene materials to simplify the complicated pre-treatment and detection procedures. This study demonstrates a presumable and general method for detecting estrogen-like small molecules in the environment and in food.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

References

Download references

Funding

This work was financially supported by the National Key R&D Program of China (No. 2018YFC1603500), Tianjin Natural Science Foundation (No. 17JCQNJC12500), and Tianjin Scientific and Technology Support Program Funding Agency (No. 16YFZCNC00730).

Author information

Authors and Affiliations

Authors

Corresponding authors

Correspondence to Shuang Li or Zhixian Gao.

Ethics declarations

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Conflict of Interest

Lijie Qu declares that he has no conflict of interest. Jialei Bai declares that he has no conflict of interest. Yuan Peng declares that he has no conflict of interest. Dianpeng Han declares that he has no conflict of interest. Baoan Ning declares that he has no conflict of interest. Huanying Zhou declares that he has no conflict of interest. Shuang Li declares that he has no conflict of interest. Zhixian Gao declares that he has no conflict of interest.

Informed Consent

Informed consent is not applicable.

Additional information

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Electronic supplementary material

ESM 1

(DOCX 5229 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Qu, L., Bai, J., Peng, Y. et al. Detection of Three Different Estrogens in Milk Employing SPR Sensors Based on Double Signal Amplification Using Graphene. Food Anal. Methods 14, 54–65 (2021). https://doi.org/10.1007/s12161-020-01852-x

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12161-020-01852-x

Keywords

Navigation