Method for rapid detection of metal Al<3+>

A metal and fast technology, applied in color/spectral characteristic measurement, chemical analysis by titration method, fluorescence/phosphorescence, etc., can solve the problems of inferior sensitivity to fluorescence, low accuracy, sensitivity, and inability to detect, etc., to achieve the preparation method Simple, accurate measurement data, time-saving effect

Inactive Publication Date: 2015-11-25
YANCHENG TEACHERS UNIV
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Problems solved by technology

This method is time-consuming and laborious, and cannot meet the requirements of rapid detection of aluminum content, and the accuracy and sensitivity are not high. This method can only measure the approximate range of aluminum content
In addition, the sensitivity of UV spectrophotometer is not as good as that of fluorescence. For samples with low aluminum content, UV-visible light may not be able to detect

Method used

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  • Method for rapid detection of metal Al&lt;3+&gt;
  • Method for rapid detection of metal Al&lt;3+&gt;

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Experimental program
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Effect test

Embodiment

[0018] 1. UV-visible spectroscopic titration experiment:

[0019] use C 2 h 5 OH / H 2 O was used as solvent, and the concentration of OCN was 2.5×10 -6 mol / L,Al 3+ The final concentration was 5.75×10 -6 mol / L, the concentration ratio is 1:2.3.

[0020] Dilute 2.5 μL to a concentration of 1.0 x 10 -3 mol L -1 The synthetic solution of 2-hydroxy-1-naphthaldehyde urea was added to the 2mL absolute ethanol / H 2 O (v:v=1:1) quartz cuvette, then gradually add Al 3+ solution (concentration of 2 × 10 -4 mol L -1 , add 2.5 μL each time). It can be seen from the titration curve that with Al 3+ With the continuous addition of , the UV absorption intensity at 315nm and 350nm decreases continuously, while the absorption at 335nm and 385nm increases continuously. When Al in the system 3+ The concentration reaches 5.0×10 -6 mol L -1 Afterwards, the intensity of the absorption peak no longer increases. Two isabsorptive points appear at 320nm and 362nm.

[0021] 2. Fluorescence...

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Abstract

The invention discloses a method for rapid detection of metal Al<3+>, and relates to the ion detection technical field. A synthetic method comprises the steps: including 2-hydroxyl-1-naphthalene formaldehyde urea and anhydrous ethanol, during preparation, weighing 2-hydroxyl-1-naphthalene formaldehyde urea, dissolving with anhydrous ethanol to prepare a 0.01 M mother liquid, and then diluting to 2.5*10<-6> M with anhydrous ethanol. The method is prone to realization of rapid detection and easy and fast to operate, the preparation method is simple, the time is saved, and the measurement data are accurate.

Description

technical field [0001] The invention relates to the technical field of ion detection, in particular to a rapid detection of metal Al 3+ Methods. Background technique [0002] The current method for detecting aluminum content is mainly to use a series of complexes formed by a series of different amounts of aluminum and chrome azure S or cetyltrimethylamine bromide, measure its absorbance with an ultraviolet spectrophotometer, and then draw a standard curve To measure the aluminum content in the sample. This method is time-consuming and laborious, and cannot meet the requirements of rapid detection of aluminum content, and the accuracy and sensitivity are not high. This method can only measure the approximate range of aluminum content. In addition, the sensitivity of ultraviolet spectrophotometer is not as good as that of fluorescence. For samples with low aluminum content, ultraviolet and visible light may not be able to detect. Contents of the invention [0003] The obj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N21/64G01N31/16
Inventor 王清明耿荣庆汤新慧宋佳亮祁辉李杨
Owner YANCHENG TEACHERS UNIV
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