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Method for preparing parathion molecular imprinting polymer for water quality detection

A technology for molecular imprinting and water quality detection, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as long polymerization time, achieve high affinity and selectivity, good separation effect, and shorten the polymerization reaction time.

Inactive Publication Date: 2013-01-09
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the article "Pesticide Parathion Molecularly Imprinted Polymer Synthesis and Affinity Evaluation", Liu Zhen et al. used parathion as a template molecule and azobisisobutyronitrile as an initiator to synthesize parathion by precipitation polymerization. Thion molecularly imprinted polymer, however, its polymerization time is as long as 24h

Method used

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  • Method for preparing parathion molecular imprinting polymer for water quality detection
  • Method for preparing parathion molecular imprinting polymer for water quality detection
  • Method for preparing parathion molecular imprinting polymer for water quality detection

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 100.5mg of parathion, 145.1mg of 4-vinylpyridine and 26520mg of dichloromethane in sequence in the Erlenmeyer flask of the reactor, shake at 25°C for 1h, and place in a refrigerator at 4°C for 12h. Then add 2964mgTMPTA and 178.4mg photoinitiator, mix evenly, fill the reactor with nitrogen for 2min, then vacuumize and seal the reactor, place the reactor in an ice-water bath and adjust the ultraviolet lamp to react with the ice-water bath under the water surface The distance between the devices was 7 cm, and the reaction system was subjected to photopolymerization. After reacting for 2 hours, the obtained massive product was taken out, crushed, ground, extracted with methanol / acetic acid solvent with a volume ratio of 9 / 1, and dried in vacuum to obtain 2568 mg of parathion molecularly imprinted polymer.

Embodiment 2

[0044] The difference between this embodiment and embodiment 1 is:

[0045] Change monomer into 50mg MMA among the embodiment 1, the consumption of cross-linking agent TMPTA is changed into 1025mg, the consumption of photoinitiator is changed into 105mg, and the reaction time is changed into 0.5h, and the distance of ultraviolet lamp tube from reactor is 11 cm, Other operations are all carried out according to Example 1 to form Example 2.

Embodiment 3

[0047] The difference between this embodiment and embodiment 1 is:

[0048] In embodiment 1, parathion is changed into 115mg, monomer is changed into 325mgMA, crosslinking agent consumption is changed into 5-241mg, photoinitiator consumption is changed into 452mg, reaction time is changed into 1.5h, and the distance of ultraviolet lamp from reactor is 3cm, other operations are carried out by embodiment 1, constitute embodiment 3.

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Abstract

The invention discloses a method for preparing a parathion molecular imprinting polymer for water quality detection. According to the method, parathion is used as a template molecule to polymerize the parathion molecularly imprinted polymer for organic phosphorus detection in a water environment under the initiation action of ultraviolet light. The parathion molecularly imprinted polymer prepared by the method has the advantages of short polymerization time and favorable adsorbability; and when the prepared parathion molecularly imprinted polymer is used as a solid phase extraction column filler, solid phase extraction-gas phase chromatography can be utilized to quickly and effectively analyze organic phosphorus pesticide in water, and the parathion molecularly imprinted polymer has the advantages of favorable separating effect, less impurity interference, low detection limit, high sensitivity, high precision and favorable recovery effect, and can satisfy the requirements for detecting trace amounts of organic phosphorus in water.

Description

technical field [0001] The invention relates to a method for preparing a parathion molecularly imprinted polymer, in particular to a method for preparing a parathion molecularly imprinted polymer for water quality detection through photoinitiated polymerization. Background technique [0002] Organophosphorus is one of the widely used pesticides at present. Organophosphorus is a nerve agent, which can cause poisoning of humans and animals to varying degrees and cause environmental pollution. Long-term drinking of water containing organophosphate can cause human cancer, arteriosclerosis, cardiovascular disease, and fetal malformation. , stillbirth, premature death, premature aging and other diseases. Therefore, it is of great significance to establish a more effective method for the detection of organic phosphorus residues in water. At present, there are many reports on the detection methods of organophosphorus in fruits, vegetables and soil by using organophosphorus molecula...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F220/14C08F220/06C08F220/56C08F222/14C08F2/48C08J9/26B01J20/26B01J20/285B01J20/30
Inventor 刘静曾兴宇潘献辉
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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