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Method for detecting concentration of mercury ions in sample

A mercury ion and concentration technology, applied in the direction of measuring devices, instruments, fluorescence/phosphorescence, etc., can solve the problems of insufficient response speed, insufficient selectivity, complex synthesis, etc., achieve good stability, simple synthesis, and facilitate promotion Applied effect

Inactive Publication Date: 2017-06-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems with the currently reported colorimetric and fluorescent probes, including insufficient selectivity, insufficient response speed, and complex synthesis.

Method used

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  • Method for detecting concentration of mercury ions in sample
  • Method for detecting concentration of mercury ions in sample
  • Method for detecting concentration of mercury ions in sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]

[0035] (Scheme 1) 387mg (1mmol) of rhodamine B-hybridized fluorescein was dissolved in 15mL of dichloromethane, then 337mg (2mmol) of phenyl thiochloroformate was added and stirred at room temperature for 6h, and then a rotary evaporator was used for rotary evaporation, Get crude product. If a purer product is to be obtained, it can be recrystallized in a mixed system of dichloromethane and petroleum ether (eg v / v, 1:5) to obtain a pure product. 364 mg of red pure product was obtained in 64% yield.

[0036] (Scheme 2) 387 mg (1 mmol) of rhodamine B-hybridized fluorescein was dissolved in 15 mL of dichloromethane, then 252.7 mg (1.5 mmol) of phenyl thiochloroformate was added and stirred at room temperature for 6 h, and then rotated by a rotary evaporator. Steam to obtain crude product. If a purer product is to be obtained, it can be recrystallized in a mixed system of dichloromethane and petroleum ether (eg v / v, 1:5) to obtain a pure product. 297 mg of red pure ...

Embodiment 2

[0042] figure 1 Is the probe (5 μM) added with Hg 2+ Fluorescence spectra before and after (10 μM). It can be clearly seen from the figure that the addition of mercury ions leads to an increase in the fluorescence intensity.

Embodiment 3

[0044] Figure 2a are different concentrations of Hg 2+ (0-0.8μM) on the fluorescence spectrum of the probe (5μM); Figure 2b are different concentrations of Hg 2 + (0-10 μM) on the UV absorption spectrum of the probe (10 μM).

[0045] Depend on Figure 2a It can be seen that along with the Hg in the probe solution 2+ With the increase of concentration, the fluorescence intensity gradually increased, and at (0-0.8μM) Hg 2+ Concentration range, Hg 2+ There is a good linear relationship between the concentration and the fluorescence intensity. This proves that Hg can be detected with the help of this fluorescent probe 2+ Quantitative analysis with high sensitivity. Hg in my country's drinking water standard 2+ The standard limit of Hg is 0.001mg / L. Therefore, the probe of the present invention can more accurately determine the Hg in the sample to be tested. 2+ content. In addition, with Hg 2+ With the increase of the concentration, the absorption spectrum is also gr...

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Abstract

The invention relates to a method for detecting the concentration of mercury ions in a sample. Specifically, the method provided by the invention utilizes a probe and the probe is a phenyl thiocarbonate compound and can be used as a mercury ion colorimetric fluorescent probe for detecting the mercury ions. The detection method provided by the invention can realize at least one the following technical effects that the mercury ions are highly selectively identified; the mercury ions can be rapidly responded; high-sensitivity analysis of the mercury ions can be realized; the probe has stable properties and can be stored and used for a long period; and the anti-interference capability is relatively high.

Description

technical field [0001] The present invention relates to a method for detecting the concentration of mercury ions in a sample. Specifically, the method of the present invention uses a thiocarbonate compound as a mercury ion fluorescent probe, which can rapidly and sensitively identify mercury ions with high selectivity and can Determine or qualitatively determine the concentration of mercury ions in a sample. Background technique [0002] Mercury is a metal element with serious physiological toxicity, which makes it one of the most interesting environmental pollutants due to its persistence, easy migration and high bioaccumulation. Inorganic mercury ions in the environment can be converted into highly toxic methylmercury by organisms under certain conditions. Inorganic mercury mainly affects the kidneys, while methylmercury mainly affects the nervous system, especially the central nervous system, after entering the human body. Both can be highly enriched in biological tissu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 段庆霞张萌柳彩云王作凯朱宝存杜斌
Owner UNIV OF JINAN