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Colorimetric sensor and manufacturing method and application thereof

A technology of colorimetric sensor and manufacturing method, which is applied in the field of chemical analysis, can solve the problems of low sensitivity of hexavalent chromium ions, and achieve the effects of improving detection limit and sensitivity and accelerating aggregation

Active Publication Date: 2021-12-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, provide a colorimetric sensor and its production method and application, and solve the technical problem of low sensitivity in detecting hexavalent chromium ions in the prior art

Method used

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  • Colorimetric sensor and manufacturing method and application thereof
  • Colorimetric sensor and manufacturing method and application thereof
  • Colorimetric sensor and manufacturing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] This embodiment proposes a colorimetric sensor, which is prepared by the following steps:

[0052] S1, soak the cotton cloth in a sodium carbonate solution with a mass fraction of 10% and treat it at 80°C;

[0053] S2, the cotton cloth treated in step S1 is activated in a NaOH solution with a mass fraction of 10% for 12 hours, and the activated cotton cloth is soaked in a solution containing 2,3-epoxypropyltrimethylammonium chloride and NaOH Carry out cationic modification at 90°C for 4h to obtain the modified cotton cloth; The concentration is 0.08g / mL, and the concentration of NaOH is 10%;

[0054] S3. Soak the modified cotton cloth in a diphenylcarbazide solution with a concentration of 6mmol / L at 20°C and shake it for 1 hour to obtain a colorimetric sensor, so that diphenylcarbazide is loaded on the cotton cloth, and then dried , Cut the colorimetric detector into small pieces with a length*width of 0.6cm*0.8cm, and store in a cool and dry place sealed.

[0055] ...

Embodiment 2

[0057] This embodiment proposes a colorimetric sensor, which is prepared by the following steps:

[0058] S1. Soak the cotton cloth in a sodium carbonate solution with a mass fraction of 15% and treat it at 90°C;

[0059] S2, the cotton cloth treated in step S1 is activated in a NaOH solution with a mass fraction of 15% for 15 hours, and the activated cotton cloth is soaked in a solution containing 2,3-epoxypropyltrimethylammonium chloride and NaOH Carry out cationic modification at 80°C for 3h to obtain the modified cotton cloth; The concentration is 0.1g / mL, the concentration of NaOH is 15%;

[0060] S3. Soak the modified cotton cloth in a diphenylcarbazide solution with a concentration of 7mmol / L at 25°C and shake it for 1.5h to obtain a colorimetric sensor, so that diphenylcarbazide is loaded on the cotton cloth, and then Dry, cut the colorimetric detector into small pieces with a length*width of 0.6cm*0.8cm, and store in a cool and dry place sealed.

Embodiment 3

[0062] This embodiment proposes a colorimetric sensor, which is prepared by the following steps:

[0063] S1. Soak the cotton cloth in a sodium carbonate solution with a mass fraction of 12% and treat it at 100°C;

[0064] S2, the cotton cloth treated in step S1 is activated in a NaOH solution with a mass fraction of 12% for 13 hours, and the activated cotton cloth is soaked in a solution containing 2,3-epoxypropyltrimethylammonium chloride and NaOH Carry out cationic modification at 85°C for 5h to obtain the modified cotton cloth; The concentration is 0.09g / mL, and the concentration of NaOH is 12%;

[0065] S3. Soak the modified cotton cloth in a diphenylcarbazide solution with a concentration of 7mmol / L at 25°C and shake it for 2 hours to obtain a colorimetric sensor, so that diphenylcarbazide is loaded on the cotton cloth, and then dried , Cut the colorimetric detector into small pieces with a length*width of 0.6cm*0.8cm, and store in a cool and dry place sealed.

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Abstract

The invention discloses a colorimetric sensor and a manufacturing method and application thereof, and belongs to the technical field of chemical analysis. The manufacturing method of the colorimetric sensor comprises the following steps: S1, soaking cotton cloth in a sodium carbonate solution, and treating at 80-100 DEG C; S2, activating the cotton cloth treated in the step S1 in a NaOH solution, soaking the activated cotton cloth in a solution containing 2, 3-epoxypropyltrimethylammonium chloride and NaOH, and carrying out cation modification to obtain modified cotton cloth; and S3, soaking the modified cotton cloth in a diphenylcarbazide solution to obtain the colorimetric sensor. The invention further discloses the colorimetric sensor manufactured by the manufacturing method. In addition, the invention also comprises the colorimetric sensor manufactured by the manufacturing method or application of the colorimetric sensor in detection of hexavalent chromium ions. The colorimetric sensor has high sensitivity in detection of hexavalent chromium ions.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a colorimetric sensor and its manufacturing method and application. Background technique [0002] Chromium and its compounds are important raw materials for industrial production and are widely used in metal smelting, machinery manufacturing, electroplating, tanning, paint, pigment, printing and dyeing industries and other fields. However, hexavalent chromium is extremely harmful to the human body and has the effect of causing cancer and inducing gene mutations. Long-term intake can cause diseases such as squamous cell carcinoma, adenocarcinoma, and lung cancer. Therefore, hexavalent chromium is also a major heavy metal pollutant. Therefore, research A rapid on-the-spot detection of the concentration of chromium ions in solution plays a huge role in regulating sewage discharge. [0003] At present, the methods for detecting hexavalent chromium are: spectrophotometry, E...

Claims

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Application Information

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IPC IPC(8): G01N21/25G01N21/31
CPCG01N21/25G01N21/31
Inventor 张甜蒋向阳廖雨潇赵子懿唐楚楚皮埃尔
Owner WUHAN UNIV OF TECH
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