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Rhodamine 6G hydrazide salicylaldehyde azomethine, synthesizing process and application in measuring content of copper ion

A synthesis method, hydrazide technology, applied in the field of organic dye solution production solution, can solve the problems of easy introduction of errors, large interference of transition metal ions, cumbersome operation, etc., and achieve low cost, wide linear range and simple manufacture.

Inactive Publication Date: 2008-09-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. It is necessary to use highly toxic organic solvents (such as carbon tetrachloride) for extraction operations
[0006] 2. The operation is cumbersome and it is easy to introduce errors
[0007] 3. Iron, cobalt, nickel and other transition metal ions interfere greatly, so it is often necessary to add masking reagents

Method used

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  • Rhodamine 6G hydrazide salicylaldehyde azomethine, synthesizing process and application in measuring content of copper ion
  • Rhodamine 6G hydrazide salicylaldehyde azomethine, synthesizing process and application in measuring content of copper ion
  • Rhodamine 6G hydrazide salicylaldehyde azomethine, synthesizing process and application in measuring content of copper ion

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Add 0.24 g of rhodamine 6G and 0.96 g of hydrazine hydrate in sequence to 15 ml of ethanol, react at 30 degrees Celsius for 8 hours, cool, and filter out the resulting precipitate. 0.043 g of the resulting precipitate was dissolved in 30 ml of ethanol / dichloromethane mixed solvent with a volume ratio of 3:1, 0.172 g of salicylaldehyde was added, reacted at 50 degrees Celsius for 12 hours, the solvent was removed under reduced pressure, and the solid residue was washed with ethanol. The product was dried to obtain rhodamine 6G hydrazide salicylaldehyde Schiffer base with a yield of 52%.

Embodiment 2

[0040] Add 24 grams of rhodamine 6G and 24 grams of hydrazine hydrate successively in 500 milliliters of ethanol, react at 80 degrees centigrade for 48 hours, cool, and filter out the precipitate produced. 21.5 grams of the resulting precipitate were dissolved in 300 milliliters of ethanol / dichloromethane mixed solvent with a volume ratio of 1:3, 21.5 grams of salicylaldehyde was added, reacted at 75 degrees Celsius for 96 hours, the solvent was removed under reduced pressure, and the solid residue was washed with ethanol. The product was dried to obtain rhodamine 6G hydrazide salicylaldehyde Schiffer base with a yield of 91%.

Embodiment 3

[0042] 2.4 g of rhodamine 6G and 0.6 g of hydrazine hydrate were added successively to 50 ml of ethanol, reacted at 60 degrees Celsius for 24 hours, cooled, and filtered out the resulting precipitate. 2.15 grams of the resulting precipitate were dissolved in 30 milliliters of ethanol / dichloromethane mixed solvent with a volume ratio of 1:1, 1.08 grams of salicylaldehyde was added, reacted at 75 degrees Celsius for 24 hours, the solvent was removed under reduced pressure, and the solid residue was washed with ethanol. The product was dried to obtain rhodamine 6G hydrazide salicylaldehyde Schiffer base with a yield of 78%.

[0043] Embodiment four to ten are the solutions of the present invention used for the determination of copper ion content in water samples.

[0044] The following solutions were prepared, numbered A, B, C, D, E, F, G, H, I in sequence.

[0045] A:

[0046] 495 grams of ethanol, 5 grams of acetic acid / sodium acetate buffer solution of pH=5 (the total concen...

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Abstract

The present invention relates to rhodamine 6G hydrazide salicylal azomethine, a synthesization method and an application in the content determination of cupric ions, which belong to the field of the analysis and determination of cupric ions in water sample. The molecular structural formula of the rhodamine 6G hydrazide salicylal azomethine is shown on the right, and the present invention discloses the synthesization method of the rhodamine 6G hydrazide salicylal azomethine and rhodamine 6G hydrazide salicylal azomethine solution used for the content determination of a small amount of cupric ions in water sample: 0 percent to 98.99 percent of ethanol, 99.99 percent to 1 percent of acetic acid / sodium acetate buffer solution with the pH value of 5 to 9, in which the total concentration of acetic acid is 1 to 100 millimoles per litre, 0.01 percent of N, N-dimethylformamide and 1ppm to 100ppm of rhodamine 6G hydrazide salicylal azomethine, all measured in mass percentage. By a spectrophotometer, the solution can be used for the accurate quantitative determination of 0.005ppm to 0.256ppm of cupric ions in water sample as well as the semiquantitative determination of no less than 0.075ppm of cupric ions in water sample by direct naked-eye observation on the change of colors.

Description

technical field [0001] The invention belongs to the field of analysis and measurement of copper ions in water samples, and relates to the preparation of a solution by using an organic dye solution that specifically develops color to copper ions and its application. Background technique [0002] Copper ion is a common heavy metal ion that widely exists in the environment. Its presence in the human body in an appropriate amount is beneficial to maintain the normal work of the body, such as participating in hematopoiesis, enzyme reactions, and some redox processes in the body. However, if the metabolic balance of copper ions in the body is disrupted, such as lack or excess of copper ions, it may lead to a series of diseases, such as Menkes syndrome and Wilson syndrome. Therefore, it is very important to detect the content of copper ions in various water qualities related to human life. my country's drinking water standard (GB 5749-85) stipulates that the copper ion content in ...

Claims

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Application Information

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IPC IPC(8): C07D491/10G01N21/78G01N31/22
Inventor 向宇童爱军
Owner TSINGHUA UNIV
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