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Method for detecting silver ions in drinking water

A technology for drinking water and silver ions, which is used in chemical instruments and methods, preparation of organic compounds, and material analysis by observing the effect on chemical indicators, can solve the problems of unreported fluorescence detection of white light materials, and achieve simple preparation. , detect the effect of low concentration

Active Publication Date: 2019-05-21
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past 20 years, there have been many literatures on fluorescence detection using rare earth coordination polymers, but no reports on fluorescence detection using white light materials.

Method used

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  • Method for detecting silver ions in drinking water
  • Method for detecting silver ions in drinking water
  • Method for detecting silver ions in drinking water

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Experimental program
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specific Embodiment approach 1

[0045] Embodiment one: the method for detecting silver ions in drinking water in this embodiment is carried out according to the following steps:

[0046] 1. Dissolve 0.1g~100g of dibenzoyl tartaric acid rare earth complex in 0.1mL~50mL of N,N’-dimethylformamide solvent to prepare a mixed solution;

[0047] 2. Mix the drinking water and the mixed solution at a volume ratio of 1:1, irradiate with ultraviolet light with a wavelength of 320nm to 324nm, and observe the color of the solution. When the concentration of silver ions in the drinking water is higher than 0.05ppm, the color of the solution changes from white to red. .

specific Embodiment approach 2

[0048] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the rare earth complexes of dibenzoyl tartrate described in step one are samarium dibenzoyl tartrate complexes, europium dibenzoyl tartrate complexes and diphenyl The terbium formyl tartrate complex is mixed in a mass ratio of 1:1:3-6. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0049] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the preparation method of the dibenzoyl tartaric acid rare earth complex is as follows:

[0050] Add 0.1g~100g of dibenzoyl tartaric acid to 0.1mL~50mL of solvent, then add 0.1mL~2mL of deionizer until dissolved, add 0.01g~100g of rare earth chloride salt with a concentration of 0.01~1mol / L aqueous solution, stirred at room temperature for 2 hours, filtered, washed with water and methanol, and vacuum-dried at 55°C to 65°C to obtain dibenzoyl tartaric acid rare earth complexes; the rare earth chloride salts are samarium chloride, terbium or europium chloride; the solvent is methanol, water or ethanol; the deionizing agent is triethylamine, sodium hydroxide or potassium hydroxide. Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a method for detecting silver ions in drinking water, and aims to solve the technical problem that low detecting concentration is difficult to be reached as fluorescence detection is performed by the aid of a quenching or enhancing method. The detecting method includes the steps: firstly, dissolving bibenzoyl tartaric acid coordination compounds into N, N'-dimethyl formamide solvents to prepare into mixed liquid; secondly, mixing the drinking water and the mixed liquid according to the volume ratio of 1:1, irradiating mixture by the aid of ultraviolet light by the aid of the wave length ranging from 320nm to 324nm, observing a solution color. The solution color changes into red from white when the concentration of the silver ions in the drinking water is higher than 0.05ppm. The method is simple to prepare, low in detecting concentration, the silver ions in the drinking water are detected by the aid of white-light materials, the color of the white-light materials changes into red when the concentration of the silver ions is equal to or higher than 0.05ppm, and detection limit meets world health organization standards.

Description

technical field [0001] The invention relates to a method for detecting silver ions in drinking water. Background technique [0002] Silver is one of the most widely used heavy metals in human production and life. In ancient times, humans used silver as the main currency in circulation and a toxicity tester. At present, elemental silver and silver ions (Ag + ) are also widely used in the fields of materials, medicine, batteries, semiconductors and imaging. Especially in the field of medicine, silver compounds are used as antibacterial drugs, precursors of anti-HIV drugs, implant prostheses and disinfection reagents because of their unique antibacterial properties. However, it is precisely because of the wide application of silver ions that it can be enriched in a large amount in the skin, liver and kidney of the human body, and cause a series of diseases. In order to reduce the occurrence of these diseases, the World Health Organization stipulates that the concentration o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78C09K9/02C09K11/06C07C67/28C07C69/78
CPCC07C67/28C09K9/02C09K11/06C09K2211/182G01N21/78C07C69/78
Inventor 李玉鑫李光明赵丽娜
Owner HEILONGJIANG UNIV
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