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Copper ion detection reagent, test paper, preparation method and application in copper ion detection

A technology of copper ion detection and test paper, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems that naked eye detection cannot be realized, and achieve good stability and large The effect of small specific surface area and required amount

Active Publication Date: 2021-04-27
上海历思实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chromogenic agent also needs the help of an instrument to achieve detection, and cannot achieve naked eye detection

Method used

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  • Copper ion detection reagent, test paper, preparation method and application in copper ion detection
  • Copper ion detection reagent, test paper, preparation method and application in copper ion detection
  • Copper ion detection reagent, test paper, preparation method and application in copper ion detection

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Experimental program
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Effect test

Embodiment 1

[0081] Embodiment 1: copper ion detection reagent

[0082] (1) Preparation of 1-(2-pyridylazo)-2-naphthol-6-sulfonic acid: Weigh 1.00g 1-(2-pyridylazo)-2-naphthol into 100mL dry conical Add a magnet to the bottle, carefully add 20 mL of oleum (the mass concentration of oleum is 20%) under stirring, cover with a stopper, and stir at room temperature for 1 h. Slowly pour the reacted solution into a beaker containing 200.0 mL of ultrapure water in an ice-water bath, seal it and place it in the refrigerator to freeze overnight (the freezing temperature is -15°C), after which orange-red crystals precipitate out; Filter, wash the solid with a small amount of ice water and ethanol, and drain. After the product was dried overnight in a vacuum oven at 37°C, it was taken out and placed in a sample bottle for sealed storage.

[0083] (2) Preparation of copper ion detection reagent: prepare 1-(2-pyridylazo)-2-naphthol-6-sulfonic acid-water dispersion, the mass concentration is 0.04%, th...

Embodiment 2

[0087] Embodiment 2: copper ion detection test paper

[0088] (1) Fix ordinary quantitative filter paper in a suction filtration device, add about 10mL of ethanol into the funnel, and vacuum pump it out, rinse it three times in this way, pump it for 15 minutes and dry it for later use.

[0089](2) Prepare a 100 mM tetrabutyl titanate solution in a solvent of toluene / ethanol (volume ratio 1:1), and stir at room temperature for 1 h for later use.

[0090] (3) Take about 5.0mL of tetrabutyl titanate solution and put it into the funnel, slowly pump out half of it to ensure that the filter paper is always soaked in the solution, and let it stand for 3 minutes.

[0091] (4) Slowly filter out the remaining tetrabutyl titanate solution. When the liquid level is close to the surface of the filter paper, quickly add about 10mL of ethanol, and slowly remove half of it. Repeat this process for 3 times to remove physically adsorbed tetrabutyl titanate. Esters, continue to add 10mL of etha...

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Abstract

The invention discloses a copper ion detection reagent, a test paper, a preparation method thereof and an application in copper ion detection. The copper ion detection reagent is 1-(2-pyridylazo)-2-naphthol-6-sulfonic acid Soluble saline solution; The copper ion detection test paper comprises a substrate and a functional layer deposited on the outer surface of the substrate; the functional layer is an alternately deposited positively charged organic compound layer and 1-(2-pyridylazo)-2-naphthalene Phenol-6-sulfonic acid soluble salt layer; 1-(2-pyridylazo)-2-naphthol-6-sulfonic acid soluble salt has a general structural formula as shown in the following formula (I), where M⊕ is selected from Alkali metal ions or ammonium ions; positively charged organic compounds selected from positively charged small organic molecules or cationic polyelectrolytes. The copper ion detection reagent and detection test paper can conveniently and sensitively detect copper ions in water with naked eyes, have high detection sensitivity and high selectivity, and do not need any instruments and equipment.

Description

technical field [0001] The invention relates to the field of detection of heavy metal ions in water, in particular to a copper ion detection reagent and a preparation method thereof, a copper ion detection test paper and a preparation method thereof, and the application of the two in copper ion detection. Background technique [0002] Heavy metal ions, such as copper ions, are a common source of water pollution. When the content of copper ions in the water body is too high, it not only endangers aquatic organisms, but also threatens human health. Copper ion content is a must-test indicator for drinking water hygiene standards. Excessive copper ion content in the human body can lead to liver and kidney damage, gastrointestinal dysfunction and mental system diseases. Therefore, it is of great practical significance to research and develop a detection system that can realize the simple and efficient identification of copper ions in aqueous solution. [0003] For the detection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
Inventor 黄建国陆永新曾建刘四海沈伟峰李新平
Owner 上海历思实业有限公司
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