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Method for measuring phthalic ester in atmospheric particulates

A technology for atmospheric particulate matter and phthalate ester, which is applied in the field of trace pollutant analysis in the environment, can solve the problems of overlapping retention times of isomer groups and low resolution, and achieves reduced sample loss, high sensitivity and selectivity. Good results

Inactive Publication Date: 2010-11-10
NANKAI UNIV
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Problems solved by technology

Liquid chromatography (HPLC) is also one of the main methods for the analysis of PAEs. Liquid chromatography solves the problems of low resolution and overlapping retention times between isomer groups in the separation of isomer mixtures by GC-MS.

Method used

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  • Method for measuring phthalic ester in atmospheric particulates
  • Method for measuring phthalic ester in atmospheric particulates
  • Method for measuring phthalic ester in atmospheric particulates

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Embodiment

[0029] The method for measuring phthalates in atmospheric particulate matter uses a quartz filter membrane as a sampling filter membrane, dichloromethane as an extraction solution, an ultrasonic extraction device as an extraction device, a nitrogen blowing and trapping concentrator for concentration, and finally a gas chromatography tandem mass spectrometer for determination.

[0030] Seven state-controlled atmospheric monitoring points in Tianjin were selected as the collection points for PM 10 locations, select three of the monitoring points as the collection PM 25 The location, collected for 5 sampling days, the analysis method and effect are as follows:

[0031] Sampling process: Use a 90mm quartz filter membrane, bake at 800°C for 2 hours before sampling, balance in a balance room for 3 days under constant temperature and humidity conditions, and then weigh with a one-hundred-thousandth electronic balance. When sampling, select the medium flow sampler to sample for 24 ho...

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Abstract

The invention relates to a method for measuring phthalic ester in atmospheric particulates, belonging to the field of analysis of trace pollutants in the environment. The method uses a quartz filter membrane to collect particulates, takes dichloromethane as extracting solution, uses an ultrasonic extraction method for extraction, carries out nitrogen-blowing concentration and finally uses a gas chromatography and tandem mass spectrometry (GC / MS) for analysis and measurement, thus accurately and fast analyzing the phthalic ester in the atmospheric particulates. The specific sampling and analysis measuring method comprises the following steps: after being baked at high temperature and weighted in a balanced manner, the quartz filter membrane is sampled for 12-48 hours, the sampled and weighted filter membrane is cut into shreds which are placed into a centrifugal tube, 5-30mL of dichloromethane is added, ultrasonic extraction is carried out for 10-30 minutes, the extracting solution is filtered and collected, all the steps are repeated for one time, the extracting solutions are combined and become 3-6mL in concentration by nitrogen blowing, the combined solution is transferred into a concentrating tube for continuously blowing to be below 2mL, an internal label is added, the obtained solution is constant in volume by dichloromethane and is transferred into an automatic sampling bottle, and finally accurate measurement is carried out by using debugged GC / MS. The developed measuring method is simple and fast and has the characteristics of high recovery ratio, low detection limit, high sensitivity, matrix disturbance resistance and the like.

Description

【Technical field】 [0001] The invention belongs to the field of analysis of trace pollutants in the environment, in particular to a method for accurately and quickly measuring phthalates in atmospheric particles. 【Background technique】 [0002] Phthalates (phthalates) are important plasticizers that have attracted attention due to their important effects on reproductive health. The U.S. Environmental Protection Agency (US EPA) classified bis(2-ethylhexyl) phthalate (DEHP), dioctyl phthalate (DOP), benzyl butyl phthalate (BBP) , dibutyl phthalate (DBP), dimethyl phthalate (DMP) and diethyl phthalate (DEP) and other 6 kinds of phthalates are listed as priority control toxic pollutants. my country will DMP , DBP, and DOP are listed as priority monitoring pollutants. Phthalates enter the natural environment, undergo processes such as leaching, volatilization, sedimentation and degradation, migrate and transform in environmental media such as soil, water and the atmosphere, and ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N1/10
Inventor 姬亚芹刘玲玲赵雪艳
Owner NANKAI UNIV
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