Preparation and application of aluminum indicator

An indicator and indicating technology, applied in the field of detection, can solve tedious and time-consuming problems, and achieve the effect of mild measurement conditions and simple synthesis

Pending Publication Date: 2021-07-09
CHINA RAILWAY 18TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to "GB/T 176-2017 Cement Chemical Analysis", chemical analysis is more commonly used to detect aluminum. The benchmark method is EDTA direct titration of iron and aluminum content, and the substitute method is EDTA direct titration and copper sulfate back titrat

Method used

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  • Preparation and application of aluminum indicator
  • Preparation and application of aluminum indicator
  • Preparation and application of aluminum indicator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, the preparation route of compound QS are as follows:

[0024]

[0025] Its concrete preparation steps are as follows:

[0026] Add 1,2-dihydroxyanthraquinone (1mmol) and polyoxymethylene (6mmol) in turn to the flask, add ethanol 25mL, slowly add hexahydropyridine (2mmol) dropwise, stir, heat at 70°C overnight, cool to room temperature, pump Filter and wash to obtain a brown powder. . 1 HNMR (400MHz, CDCl 3 ,ppm):δ1.53(s,2H,CH 2 ), 1.70(t, 4H, J=6.0Hz), 2.62(s, 4H, CH 2 ),3.84(s,2H,NCH 2 ),7.54(s,1H,Ar-H),7.76(s,2H,Ar-H),8.27(s,2H,Ar-H)

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Abstract

The invention discloses preparation and application of an aluminum indicator, which are characterized in that 1,2-dihydroxy anthraquinone and polyformaldehyde are added into an ethanol solution, alkali is added, the mixture is subjected to a heating reaction, and separation and purification are performed to obtain a compound QS, namely the aluminum indicator. A probe prepared by the invention is simple to synthesize, stable in property and mild in determination condition, and can be stably stored for a long time; selectivity is high, and color changes exist; the indicator is suitable for construction site rapid detection. The indicator is simple in method, convenient, rapid, high in sensitivity, resistant to interference and easy to popularize.

Description

technical field [0001] The invention relates to the preparation and application of a qualitative aluminum indicator, belonging to the detection field. Background technique [0002] At present, the requirements for concrete strength are higher than in the past, and there are strict regulations on commercial concrete materials, including cement, mineral powder, fly ash and other admixtures. According to "GB / T 176-2017 Cement Chemical Analysis", chemical analysis is more commonly used to detect aluminum. The benchmark method is EDTA direct titration of iron and aluminum content, and the substitute method is EDTA direct titration and copper sulfate back titration. From the preparation From the solution to the operation and then to the calculation result, a variety of chemical reagents and equipment are required, which is cumbersome and time-consuming. In addition, the training of technical personnel is required to achieve accurate detection. [0003] With the update of the stan...

Claims

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Application Information

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IPC IPC(8): C07D295/116G01N21/64G01N21/78
CPCC07D295/116G01N21/6402G01N21/78
Inventor 刘秋晨陈诗林高江王建涛蔡松涛刘畅
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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