Detection method of polychlorinated biphenyls based on magnetic bamboo charcoal dispersion matrix solid-phase extraction

A technology of polychlorinated biphenyls and dispersed matrix, which is used in measurement devices, material separation, analysis materials, etc., can solve the problems of incomplete separation of adsorbent and liquid phase, and achieve the effects of reliable environment, sensitive detection, and improved detection efficiency.
CN104749277BInactive Publication Date: 2017-03-08LIAOCHENG UNIV
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LIAOCHENG UNIV
Publication Date
2017-03-08
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for detecting trace polychlorinated biphenyl in water. The method is a detection method which takes disperse substrate solid-phase extraction as a sample pre-processing technology and uses a gas chromatography-electron capture detector to analyze the polychlorinated biphenyl in water. According to the method disclosed by the invention, magnetic bamboo charcoal which is cheap and easily available is taken as an adsorbent, so that the step of separating the adsorbent from the liquid phase is simplified, and the detection efficiency is improved. The method is simple and convenient, quick, high in sensitivity and reliable, and has detection limit up to 0.02-0.05 mu gL<-1>.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a detection method for polychlorinated biphenyls in water, in particular to a simple, fast and sensitive method for detecting polychlorinated biphenyls in water. The method uses cheap and easy-to-prepare magnetic bamboo charcoal as an adsorbent to absorb and enrich polychlorinated biphenyls in water, desorbs them with an organic solvent, and detects them with a gas chromatography-electron capture detector. The method of the invention simplifies the separation steps of the adsorbent and the liquid phase, and improves the water sample pretreatment efficiency.

[0002] technical background

[0003] Polychlorinated biphenyls are produced by replacing one or more hydrogen atoms in biphenyl with chlorine atoms. It is a group of compounds with a total of 209 compounds. PCBs have good chemical inertness and non-flammability, and are mainly used as insulators of transformers and capacitors as flame retardants. PCBs are also important c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More