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Rapid visualized detection method for mercury ions

A detection method and technology of mercury ions, which are applied in the direction of analysis by chemical reaction of materials, and material analysis by observing the impact on chemical indicators, which can solve the problems of large interference, expensive instruments, and insufficient detection speed.

Active Publication Date: 2015-02-18
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These techniques have high sensitivity and selectivity and are often used in ion quantitative detection, but these methods are expensive, the sample pretreatment is more complicated during the measurement, the detection is not fast enough, and the interference is large, so the application is limited.

Method used

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  • Rapid visualized detection method for mercury ions
  • Rapid visualized detection method for mercury ions
  • Rapid visualized detection method for mercury ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0019] The configuration method of mercury ion concentration standard color card is shown in the following steps.

[0020] a Clean the strain bottle and set aside.

[0021] b Due to the needs of the experiment, different concentrations of mercury ions were prepared in advance, from high to low concentrations, label paper was pasted on the strain bottle, and the outer wall of the bottle was wrapped with tin foil.

[0022] c to the prepared probe solution (10 -5 mol / L) in different amounts of mercury ions, and carefully observed the color of the solution, it was found that the concentration of mercury ions dropped was 0 mol / L, the color of the solution was lavender, and the concentration was less than 10 -8 When mol / L, the solution color is still lavender, (1.0-10.0)×10 -7 When mol / L, the solution color is dark purple, which is (0.5-5)×10 -5 The color of the mol / L solution is blue, which is (0.5-5)×10 -4 mol / L solution color is blue-green, greater than 10 -3 The color of th...

Embodiment example 2

[0024] The probe of the invention has good selectivity to mercury ions.

[0025] a. Wash the 10mL volumetric flask to be used in advance (ultrasonic treatment), wash and dry the volumetric flask for use, and mix the spirooxazine derivative and acetonitrile in a 10mL volumetric flask to a concentration of 10 -3 mol / L solution, pipette 1mL, set the volume to 100mL, and make a concentration of 10 -5 mol / L solution. All volumetric flasks were wrapped in tin foil and protected from light. Prevent a little ultraviolet light in nature from affecting it. Since the probe material is a photochromic material, under the excitation of ultraviolet light of a specific wavelength, the spiro carbon-oxygen bond will undergo heterocleavage to form a ring-opened merocyanine structure , thus affecting the test.

[0026] b Preparation of metal ion solution: Weigh the corresponding metal salt (perchlorate) and prepare it in the acetonitrile solution to the concentration required for the experimen...

Embodiment example 3

[0029] The probe reagent of the present invention can not only qualitatively detect mercury ions dissolved in organic reagent acetonitrile in the laboratory, but also detect mercury ions in sewage in daily life, and its operation method is as follows:

[0030] a Use pre-washed and dried strain bottles to prepare the same concentration (10 -4 mol / L) probe reagent, the method for preparing solution is as described in embodiment case 1. Wrap a layer of tinfoil on the outside of the bottle to protect from light.

[0031] b Take an appropriate amount of domestic sewage and put it into a volumetric flask for later use.

[0032] c. Add 0.2mL of pre-prepared probe reagent to the first strain bottle, then add 1.8mL of domestic sewage. After shaking well, there is no color change. After standing still, the color of the solution still has no obvious change. The volume ratio of the probe reagent to the domestic sewage is 2:9, 3:9, 4:9, 5:9, 6:9, 7:9, 8:9, 9:9, and there is no solution a...

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Abstract

The invention provides a rapid visualized detection method for mercury ions. Detection ions are dropwise added in probe reagent with certain concentration, and the color change of the solution is observed by naked eyes to realize detection. The method can be used for qualitatively and quantitatively detecting mercury ions dissolved in organic reagent in a laboratory room and also can be used for detecting domestic water. The detection method has high selectivity, can be operated simply, conveniently and efficiently, and has important practical application value in the fields of biological medicine chemistry, environment science and the like.

Description

technical field [0001] The invention belongs to the field of chemical analysis and detection, and in particular relates to a mercury ion visual detection method. technical background [0002] Mercury ion is a kind of heavy metal ion with strong toxicity. Mercury ions in the environment mainly come from the discharge of industrial wastewater. Under the action of bacteria in lakes and oceans, it can be converted into more toxic methylmercury, and it will continue to accumulate in fish and other organisms, seriously endangering the ecological environment. And human health. Mercury ions can also combine with certain groups (such as thiol) in proteins in the human body, which will affect many metabolisms in cells (such as protein and nucleic acid synthesis, energy generation, etc.), thereby affecting cell growth. and function. Mercury poisoning is one of the more common occupational diseases, such as mining and smelting of mercury mines, preparation and selection of amalgam, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 宋广亮朱红军季金风冯亮徐杰何广科刘睿
Owner NANJING UNIV OF TECH
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