Electrochemiluminescence for detecting bisphenol A

An electrochemical and bisphenol-based technology, applied in the field of electrochemiluminescence for the detection of bisphenol A, can solve problems such as low attention, irregular management, and complicated experimental operations

Active Publication Date: 2019-10-01
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to irregular management and low attention, the phenomenon of incorrect use of plastic packaging products still exists, which increases the probability of BPA being transferred to the human body, thereby aggravating the degree of harm of BPA to the human body
With the emphasis on food safety, there are many research reports on BPA detection methods. At present, the commonly used detection methods mainly include fluorescence photometry, liquid chromatography, gas chromatography, spectrophotometry, etc., but these methods are ubiquitous. The experimental operation is more complicated and time-consuming and other disadvantages

Method used

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  • Electrochemiluminescence for detecting bisphenol A
  • Electrochemiluminescence for detecting bisphenol A
  • Electrochemiluminescence for detecting bisphenol A

Examples

Experimental program
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Embodiment

[0027](1) Mix 36mL of DMF and 4mL of methanol to obtain a mixed solvent, then dissolve 2.2g of terephthalic acid in the mixed solvent, and ultrasonically mix to obtain a transparent mixed solution, add 2.4mL of tetrabutyl titanate, and continue to ultrasonically stir for 15 minutes . After mixing evenly, add the above mixed solution into a polytetrafluoroethylene-lined stainless steel autoclave and react at 150°C for 48 hours. After the reaction is completed, centrifuge and wash with ethanol and deionized water respectively, and finally put the washed product Dry it in a vacuum oven at 50°C to obtain light yellow powder MIL-125. The particle size of MIL-125 prepared by this method is about 500nm, and the measured specific surface area is 1591m 2 / g, the pore volume is 0.59cm 3 / g, Ru(bpy) can be fixed well through its microporous structure 3 2+ .

[0028] Add 25mg of MIL-125 to 15mL 1.0×10 -4 mol / L Ru(bpy) 3 2+ solution, mix well and then centrifuge. Put the final pro...

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Abstract

The invention provides a method for detecting bisphenol A, in particular to the field of electrochemiluminescence detection. The operation procedure comprises the following steps of (1) preparation ofcomposite materials of Ti-based MOFs(MIL-125) fixed terpyridine ruthenium (Ru(bpy)32+); (2) preparation of Ru(bpy)32+@MIL-125 modified on the surface of a glassy carbon (GC) electrode, that is, a chemically modified electrode of Ru(bpy)32+@MIL-125 / GC; and (3) detection of bisphenol A by electrochemiluminescence, wherein the Ru(bpy)32+@MIL-125 / GC electrode is used as a working electrode, the Ag / AgCl electrode is used as a reference electrode, and the platinum electrode is used as an auxiliary electrode, thereby forming a traditional three-electrode system. In the method, the detection range is1.0*10-11mol / L to 1.0*10-6mol / L, and the minimum detection limit is 1.8*10-12mol / L. The method provided by the invention has low cost, high sensitivity and simple operation for detecting bisphenol A.

Description

technical field [0001] The invention relates to an electrochemiluminescent method for detecting bisphenol A, in particular to a Ti-based MOFs (MIL-125) immobilized ruthenium terpyridine (Ru(bpy) 3 2+ ) modified glassy carbon (GC) electrode, namely Ru(bpy) 3 2+ @MIL-125 / GC is the working electrode, and it is an electrochemiluminescence analysis method for the quantitative detection of bisphenol A in food packaging plastics. Background technique [0002] Plastic containers have the advantages of simple processing, light weight, beautiful appearance and low price. Since synthetic fiber resin materials are used in the food packaging industry, polyvinyl chloride, polystyrene, polyamide, polyvinylidene chloride, polyethylene, polyester, polypropylene, etc. have appeared one after another, and later appeared with paper, Composite materials composed of aluminum foil, etc. These materials are widely used in flexible packaging plastic bags and semi-rigid and rigid plastic cups, bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N27/30G01N27/48
CPCG01N21/76G01N27/308G01N27/48
Inventor 李静娴单学凌陈智栋
Owner CHANGZHOU UNIV
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