Skip to Content
Merck
  • Highly sensitive Fe₃O₄ nanobeads/graphene-based molecularly imprinted electrochemical sensor for 17β-estradiol in water.

Highly sensitive Fe₃O₄ nanobeads/graphene-based molecularly imprinted electrochemical sensor for 17β-estradiol in water.

Analytica chimica acta (2015-06-16)
Ying Li, Xueru Zhao, Ping Li, Yanfeng Huang, Ji Wang, Jimei Zhang
ABSTRACT

A novel molecularly imprinted electrochemical sensor based on Fe3O4 nanobeads immobilized on graphene (Fe3O4-MIP@RGO) has been developed for detecting 17β-estradiol (17β-E2) in water using reversible addition fragmentation chain transfer (RAFT) polymerization technique. 17β-E2 can be detected by this electrochemical sensor through the response current change before and after binding 17β-E2. The Fe3O4-MIP@RGO-based sensor amplifies the response current in differential pulse voltammetry measurement, allowing the detection limit reaching 0.819 nM in a wide linear range from 0.05 to 10 μM. Moreover, Fe3O4-MIP@RGO-based sensor exhibits high selectivity and sensitivity towards 17β-E2. This MIP electrochemical sensor has a promising potential in the detection of 17β-E2 in water.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
2-Hydroxyethyl 2-bromoisobutyrate, 95%
Supelco
Ethylene glycol solution, NMR reference standard, 80% in DMSO-d6 (99.9 atom % D), NMR tube size 5 mm × 8 in.
Sigma-Aldrich
Progesterone, γ-irradiated, BioXtra, suitable for cell culture
Sigma-Aldrich
Estrone, ≥99%
Sigma-Aldrich
Sodium acetate, powder, BioReagent, suitable for electrophoresis, suitable for cell culture, suitable for insect cell culture, ≥99%
Sigma-Aldrich
Sodium acetate, anhydrous, for molecular biology, ≥99%
Sigma-Aldrich
Sodium acetate, meets USP testing specifications, anhydrous
Sigma-Aldrich
Progesterone, ≥99%
Sigma-Aldrich
Sodium acetate, 99.995% trace metals basis
Sigma-Aldrich
Sodium acetate, anhydrous, BioUltra, for luminescence, for molecular biology, ≥99.0% (NT)
Sigma-Aldrich
Sodium acetate solution, BioUltra, for molecular biology, ~3 M in H2O
Sigma-Aldrich
Ethylene glycol, anhydrous, 99.8%
Sigma-Aldrich
Tetrahydrofuran, anhydrous, contains 250 ppm BHT as inhibitor, ≥99.9%
Supelco
Tetrahydrofuran, HPLC grade, ≥99.9%, inhibitor-free
Sigma-Aldrich
Progesterone, meets USP testing specifications
Sigma-Aldrich
Sodium Acetate Anhydrous, >99%, FG
Sigma-Aldrich
Ethylene glycol, BioUltra, ≥99.5% (GC)
Sigma-Aldrich
Progesterone, powder, BioReagent, suitable for cell culture
Sigma-Aldrich
Tetrahydrofuran, anhydrous, ≥99.9%, inhibitor-free
Sigma-Aldrich
Sodium acetate, BioXtra, ≥99.0%
Sigma-Aldrich
Phenylmagnesium bromide solution, 2.9 M in 2-methyltetrahydrofuran
Sigma-Aldrich
Ethylene glycol 5 M solution
Sigma-Aldrich
Phenylmagnesium bromide solution, 1.0 M in THF
Sigma-Aldrich
Phenylmagnesium bromide solution, 3.0 M in diethyl ether
Sigma-Aldrich
Estriol, ≥97%
Sigma-Aldrich
Estriol, meets USP testing specifications