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Preparation and high performance liquid chromatography combination method of difunctional monolithic column for nitrated polycyclic aromatic hydrocarbons

A polycyclic aromatic hydrocarbon, dual-function technology, applied in the fields of analytical chemistry and environmental chemistry, to achieve the effect of increased loading, efficient enrichment, and high-sensitivity detection

Inactive Publication Date: 2017-06-23
BEIJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the deficiencies of existing research and existing methods, and proposes a method for accurate and sensitive detection of nitro polycyclic aromatic hydrocarbons, that is, integral column reduction in the tube - solid phase microextraction in the tube - high performance liquid chromatography separation - laser induced fluorescence detection method

Method used

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  • Preparation and high performance liquid chromatography combination method of difunctional monolithic column for nitrated polycyclic aromatic hydrocarbons
  • Preparation and high performance liquid chromatography combination method of difunctional monolithic column for nitrated polycyclic aromatic hydrocarbons
  • Preparation and high performance liquid chromatography combination method of difunctional monolithic column for nitrated polycyclic aromatic hydrocarbons

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Embodiment 1

[0035] Example 1 Preparation of platinum-loaded graphene embedded bifunctional monolithic column

[0036] The preparation method of the bifunctional monolithic column of the present invention is specifically implemented according to the following steps:

[0037] S1. Silanization of Capillary

[0038]Take a fused silica capillary with an outer diameter of 360 μm, an inner diameter of 100 μm, and a length of 30 cm, wash the inner wall with 1.0mol / L NaOH, ultrapure water, 1.0mol / L HCl, and ultrapure water for 30 minutes, then rinse with acetone for 20 minutes, and blow dry with nitrogen . The treated capillary was injected with 50% (v / v) 3-(trimethoxysilyl) propyl methacrylate in acetone solution, reacted in the dark for 12 hours, rinsed with acetone for 20 minutes, and dried with nitrogen to obtain silanized capillary.

[0039] S2. Preparation of platinum-loaded graphene

[0040] Disperse 5 mg of graphene in 20 mL of ethylene glycol, stir and heat to 140°C, slowly add 1 mL o...

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Abstract

The invention relates to a preparation and high performance liquid chromatography combination method of a difunctional monolithic column for nitrated polycyclic aromatic hydrocarbons. The method belongs to the fields of analytical chemistry and environmental chemistry, and is an in-pipe monolithic column reduction-in-pipe solid phase microextraction-high performance liquid chromatography separation-laser-induced fluorescence detection method. The method comprises the steps of adopting a porous polymer monolithic column embedded with platinum loaded graphene as a reduction column and a solid phase microextraction column of the nitrated polycyclic aromatic hydrocarbons for carrying out high-efficiency reduction and high-efficiency enrichment on a target compound, and after separating through a capillary chromatographic column, adopting a laser-induced fluorescence detector with high sensitivity and low detection limit for detecting.

Description

technical field [0001] The invention relates to the preparation of a bifunctional monolithic column for nitro polycyclic aromatic hydrocarbons and a high-performance liquid chromatography coupling method, belonging to the fields of analytical chemistry and environmental chemistry. Background technique [0002] Nitro-PAHs are a class of organic pollutants discovered in the environment in the late 1970s, which mainly come from organic matter, incomplete combustion of biomass, and parent PAHs in the atmosphere and atmospheric media (NO 2 , NO 3 、HNO 3 etc.) are produced by photochemical reactions. Nitro PAHs are directly mutagenic and carcinogenic. Although their concentration in the atmosphere is much lower than that of polycyclic aromatic hydrocarbons (PAHs), their mutation activity is tens or even higher than that of their parent PAHs. Thousands of times. Therefore, when particulate matter carrying NPAHs enters the human body, it will seriously threaten human health. Ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02B01J20/286B01J20/30
CPCG01N30/02B01J20/286B01J20/30B01J2220/86
Inventor 郭广生王浩天李轲王昱汪夏燕
Owner BEIJING UNIV OF TECH
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