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Method for detecting mercury ions through chemiluminescence method based on Pt nanoparticles

A chemiluminescence and nanoparticle technology, applied in the field of mercury ion detection, can solve the problem of not using heavy metal ion detection and the like

Inactive Publication Date: 2018-11-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Platinum nanoparticles also have catalytic chemiluminescence properties, but have not been used for heavy metal ion detection

Method used

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  • Method for detecting mercury ions through chemiluminescence method based on Pt nanoparticles
  • Method for detecting mercury ions through chemiluminescence method based on Pt nanoparticles
  • Method for detecting mercury ions through chemiluminescence method based on Pt nanoparticles

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for detecting mercury ions by chemiluminescence based on platinum nanoparticles, said method comprising the steps of:

[0028] (1) prepare Pt nanoparticles coated with PVP;

[0029] Add 4mL of ethylene glycol into a 50mL flask, heat to 110°C, and dissolve 0.637mL of 100mM H 2 PtCl 6 and 0.045g of PVP were respectively dissolved in 2mL of ethylene glycol; then, within 1.5min, the two solutions were simultaneously added dropwise into the flask; after the reflux reaction was continued at 110°C for 3 hours, dark brown homogeneous Pt NPs were obtained, and the resulting Pt NPs were stored at room temperature for later use and diluted with ultrapure water when used.

[0030] (2) Establish a standard curve for measuring mercury ions;

[0031] Hg 2+ The detection adopts the flow injection luminescence analysis method, and the reaction device and circuit are as follows: figure 1 shown. Use a peristaltic pump to pump the NaOH solution of luminol, Pt NPs and ultrapu...

Embodiment 2

[0035] Step (1) (2) is the same as embodiment 1

[0036] (3) Use the standard addition method to test the application of this method in actual samples. Take 50 μL of tap water containing 20 nM mercury ions, mix it with 50 μL of 10 nM Pt nanoparticles, inject it into the system through the injection valve, read the luminescence value, and calculate the luminescence value The difference with the blank value was substituted into the standard curve, and the calculated detection value was 123.21nM, and the recovery rate was 102.07%.

Embodiment 3

[0038] Step (1) (2) is the same as embodiment 1

[0039] (3) Use the standard addition method to detect the application of this method in actual samples. Take 50 μL of tap water containing 1000 nM mercury ions, mix it with 50 μL of 10 nM Pt nanoparticles, inject the system through the injection valve, read the luminescence value, and calculate the luminescence value The difference with the blank value was substituted into the standard curve, and the calculated detection value was 982.13nM, and the recovery rate was 98.21%.

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Abstract

The invention discloses a method for detecting mercury ions through a chemiluminescence method based on Pt nanoparticles. The method comprises the following steps: (1) preparing PVP (Polyvinylpyrrolidone)-coated Pt nanoparticles; (2) establishing a standard curve for determining mercury ions; (3) detecting the concentration of the mercury ions. According to the method disclosed by the invention, the PVP-coated Pt nanoparticles have excellent catalytic chemiluminescence property, and luminol can also be catalyzed to generate chemiluminescence by the PVP coated Pt nanoparticles even under a condition that H2O2 does not exist; Hg<2+> has an obvious reinforcement action on a system; the detection linear ranges are 10 to 140 nM and 200 to 1000 nM, and the detection limit is 8.62 nM.

Description

technical field [0001] The invention relates to the technical field of detection of heavy metal ions, in particular to a method for detecting mercury ions by using platinum nanoparticles as raw materials to catalyze luminol electrochemiluminescence. Background technique [0002] Heavy metal ions (HMI) are one of the representative micropollutants causing ecological and environmental problems, affecting numerous environmental factors, including terrestrial and aquatic organisms. The main sources of these heavy metal ions are cosmetics and their by-products, fertilizers and other industrial and domestic wastes. Once these heavy metal ions appear in the environment, they persist for decades or even centuries because they cannot be naturally degraded and tend to accumulate in biological organisms, causing various diseases of the nervous, immune, reproductive and digestive systems. Among the various heavy metals, lead (Pb), cadmium (Cd), mercury (Hg), chromium (Cr) and arsenic (...

Claims

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Application Information

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IPC IPC(8): G01N21/76
CPCG01N21/76
Inventor 赵媛杨璇杨亚鑫崔林艳
Owner JIANGNAN UNIV
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