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Detection method for 2-methyl-4-nitroaniline in waste water

A technology of nitroaniline and detection method, which is applied in the field of analytical chemistry, can solve the problems of cumbersome sample processing steps and detection process, and achieve the effect of simple method, good crystal structure and high product purity

Inactive Publication Date: 2016-10-26
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional analysis methods not only require complex and sophisticated instruments, but also are subject to cumbersome sample processing steps and long-term detection processes

Method used

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  • Detection method for 2-methyl-4-nitroaniline in waste water
  • Detection method for 2-methyl-4-nitroaniline in waste water
  • Detection method for 2-methyl-4-nitroaniline in waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Preparation of the target framework coordination polymer: firstly mix 0.033g (ie 0.1 mmol) Pb (NO 3 ) 2 ·6H 2 6mL aqueous solution of O was added to 6mL aqueous solution containing 0.027g (ie 0.1mmol) obix, then 0.022g (ie 0.1mmol) H2asba (2-amino-5-sulfobenzoic acid) and 0.004g (ie 0.1mmol) ) NaOH 6mL aqueous solution was added to the above mixed solution to react for about 1 h. After the reaction was completed, it was left to stand and filtered, and the solid phase was taken for drying to obtain the solid powder of the complex——{[Pb(asba)(obix)]· 2H 2 O}n.

[0023] 2) Prepare the complex suspension: Take 0.0017g of the solid powder of the complex and dissolve it in 50mL deionized water to obtain a concentration of 5*10 -5 mol / L complex suspension, which is the framework coordination polymer {[Pb(asba)(obix)]·2H 2 O}n fluorescent probes.

[0024] 3) Prepare 2-methyl-4-nitroaniline methanol solution: first add 0.00057 g of 2-methyl-4-nitroaniline and 50 mL of ...

Embodiment 2

[0027] 1) Preparation of target framework coordination polymer: firstly add 10 mL aqueous solution containing 0.066 g (ie 0.2 mmol) Pb(NO3) 2 6H2O to 10 ml aqueous solution containing 0.054 g (ie 0.2 mmol) obix, then add 0.044 g (ie 0.2 mmol) H2asba and 10 mL aqueous solution containing 0.008 g (ie 0.2 mmol) NaOH were added to the above mixed solution to react for about 1 h. Solid powder——{[Pb(asba)(obix)]·2H 2 O}n.

[0028] 2) Prepare the complex suspension: Take 0.0017g of the solid powder of the complex and dissolve it in 50mL deionized water to obtain a concentration of 5*10 -5 mol / L complex suspension, which is the framework coordination polymer {[Pb(asba)(obix)]·2H 2 O}n fluorescent probes.

[0029]3) Prepare 2-methyl-4-nitroaniline methanol solution: first add 0.00057 g of 2-methyl-4-nitroaniline and 50 mL of methanol into the volumetric flask, shake the volumetric flask fully, and place Use an ultrasonic disperser for about 1 min to disperse 2-methyl-4-nitroanilin...

Embodiment 3

[0032] 1) Preparation of the target framework coordination polymer: first add 15 mL of aqueous solution containing 0.099 g (ie 0.3 mmol) of Pb(NO3)2·6H2O to 15 mL of aqueous solution containing 0.084 g (ie 0.3 mmol) of obix, and then Add 0.066 g (ie 0.3 mmol) H2asba and 15 ml aqueous solution containing 0.012 g (ie 0.3 mmol) NaOH to the above mixed solution to react for about 1 h. Solid powder of the complex——{[Pb(asba)(obix)]·2H 2 O}n.

[0033] 2) Prepare the complex suspension: Take 0.0017g of the solid powder of the complex and dissolve it in 50mL deionized water to obtain a concentration of 5*10 -5 mol / L complex suspension, which is the framework coordination polymer {[Pb(asba)(obix)]·2H 2 O}n fluorescent probes.

[0034] 3) Prepare 2-methyl-4-nitroaniline methanol solution: first add 0.00057 g of 2-methyl-4-nitroaniline and 50 mL of methanol into the volumetric flask, shake the volumetric flask fully, and place Use an ultrasonic disperser for about 1 min to disperse ...

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Abstract

The invention provides a detection method for 2-methyl-4-nitroaniline in waste water, belonging to the technical field of analytical chemistry. According to the method, a one-dimensional metal-organic framework coordination polymer {[Pb(asba)(obix)].2H2O}n is synthesized by using a solution method at first; the method is simple; and the prepared coordination polymer has a better crystal structure and high in purity. A crystal material with a periodic network structure is formed through molecule self-assembling of metal salts and organic ligand, inherits the advantages of inorganic and organic matters and can be applied to a detection environment based on a fluorescence quenching mechanism, especially to detection of a toxic pollutant 2-methyl-4-nitroaniline in waste water.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry and relates to a method for detecting 2-methyl-4-nitroaniline by using a lead complex fluorescent probe. Background technique [0002] 2-methyl-4-nitroaniline is an organic compound widely used in the dyeing and printing of cotton and hemp fiber fabrics in light industry. Behind the huge benefits it brings to people, it also inevitably brings A series of hazards, such as river pollution caused by wastewater discharge in rivers, will not only cause poisoning to aquatic organisms, but also have long-term adverse effects on the water environment. More seriously, inhalation, skin contact or ingestion of 2-methyl-4-nitroaniline can cause severe poisoning. [0003] Due to the limitations of human perception, the information that people can directly obtain from the outside world is limited. However, important things closely related to our lives are happening in the imperceptible microcosm....

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/643G01N2021/6432
Inventor 张扣林褚鑫
Owner YANGZHOU UNIV
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