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Method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash

A technology of waste incineration fly ash and hexachlorobutadiene, which can be applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of large consumption of organic solvents, low consumption of organic solvents, long time consumption, etc. The effect of high sensitivity and simple operation

Inactive Publication Date: 2018-06-12
ZHEJIANG UNIV OF TECH
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  • Description
  • Claims
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Problems solved by technology

Soxhlet extraction is a classic extraction method with high recovery rate, but it takes a long time and consumes a large amount of organic solvent; vibration extraction is generally suitable for solid samples with high water content such as animal and plant tissues; accelerated solvent extraction has the disadvantage of organic solvent consumption Ultrasonic extraction not only has the advantages of low organic solvent consumption, high extraction efficiency, simple and fast operation, etc. Moreover, the required cost is low, the instrument is compact, and it is easy to be extended to most laboratories

Method used

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  • Method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash
  • Method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash
  • Method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash

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Embodiment 1

[0036] A method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash, comprising the following steps:

[0037] (1) Sample pretreatment: The samples were collected from the incineration plant and transported back to the laboratory, ground and sieved through 80 meshes, shaken and mixed thoroughly, and then stored in the freezer of the refrigerator at -20°C.

[0038] (2) ultrasonic extraction: carry out ultrasonic extraction to fly ash sample, step is as follows;

[0039] (a) Weighing: Accurately weigh 2g of fly ash sample and place it in a stoppered Erlenmeyer flask. When carrying out the standard addition recovery test, add 50ng hexachlorobutadiene standard, 50ng pentachlorobenzene standard and 50ng hexachlorobenzene standard at the same time, mix well and place it in the dark for at least 8 hours.

[0040] (b) Extraction: Add 30 mL of dichloromethane into a 100 mL Erlenmeyer flask with a stopper, place the Erle...

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Abstract

The invention discloses a method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash. The method comprises the following steps: sample pretreatment, ultrasonic extraction, purification, gas chromatography-mass spectrometry joint detection, establishment of a standard curve and acquisition of a quantifying result. The method disclosed by the invention has the advantages of easiness in operation, high sensitivity and relatively high recovery rate at the time of impurity removal, and fills in the blank of athe method appears forthe first time for analyzing and detecting hexachlorobutadiene in fly ash.

Description

(1) Technical field [0001] The invention belongs to the technical field of environmental analysis and detection, and in particular relates to a method for simultaneously detecting hexachlorobutadiene, pentachlorobenzene and hexachlorobenzene in waste incineration fly ash. (2) Background technology [0002] Hexachlorobutadiene is an aliphatic halogenated hydrocarbon that has been used as an intermediate in chemical production, as a solvent for rubber and other polymers, as a "cleaning agent" for recovering chlorine-containing gases or for removing volatile organic components from gases ", transformer oil or heat transfer fluid, fungicides and fumigants used in viticulture, etc. Hexachlorobutadiene has high toxicity, refractory, easy bioaccumulation and potential long-distance migration ability, and it has been included in the Stockholm Convention on Persistent Organic Pollutants as a new type of persistent organic pollutants (hereinafter referred to as the "Convention")'s co...

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 张海燕江磊孟佳琪曾滔
Owner ZHEJIANG UNIV OF TECH
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