System and method for determining phthalate in atmospheric particulates

A technology for atmospheric particles and phthalates, applied to measuring devices, instruments, scientific instruments, etc., can solve problems such as phthalate pollution and achieve less pollution

Inactive Publication Date: 2015-07-08
BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention provides a system and method for measuring phthalates in atmospheric particulate matter, t

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  • System and method for determining phthalate in atmospheric particulates
  • System and method for determining phthalate in atmospheric particulates

Examples

Experimental program
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Embodiment 1

[0028] Embodiment 1, the system for measuring phthalates in atmospheric particulate matter provided by this embodiment, see figure 1 As shown, it includes: a sample to be tested 11 attached to atmospheric particulate matter, a desorption tube 12, a heating device 13, an inert gas flow mechanism 14, a trap mechanism 15, a liquid nitrogen refrigeration mechanism 16, a chromatographic column 17, and a mass spectrometer detector 18. The connection relationship and positional relationship of the above-mentioned components and mechanisms are as follows: the sample to be tested 11 is installed inside the desorption tube 12; It is connected to the mass spectrometer detector 18 in sequence, and the liquid nitrogen refrigeration mechanism 16 is connected to the trap mechanism 15; the desorption tube 12 and the trap mechanism 15 equipped with the sample 11 to be tested are heated by the heating device 13 .

[0029] In a specific implementation, thermal desorption is a combination of tec...

Embodiment 2

[0030] Embodiment 2, the method for the determination of phthalates in atmospheric particulate matter provided by this embodiment, see figure 2 shown, including the following main steps:

[0031] S20. Prepare a sample to be tested.

[0032] Membrane preparation: The sample to be tested can be an atmospheric particle sample collected by a filter membrane. The specific filter membrane can be a quartz filter membrane. Before sampling, put the quartz filter membrane in a muffle furnace at 800°C, burn it for 4 hours, and wait for the filter membrane to cool. Finally, wrap it with aluminum foil, put it in a sealed bag, and store it at -20°C.

[0033] Sampling process: The medium-flow particle sampler enriches a certain amount of particles and packs them in aluminum foil. The sampling time was from 9:30 am to 9:00 am the next day, with continuous sampling for 23 hours and 30 minutes. During the sampling process, all factors concerning the validity and representativeness of the sa...

experiment example 1

[0042] Experimental example 1. This experimental example adopts the system of the above-mentioned embodiment 1 and the method of the embodiment 2. The Chegongzhuang Comprehensive Observation Station in Haidian District, Beijing was selected as the location for collecting particulate matter, and a sample was collected every 6 days, with continuous sampling for 23 hours and 30 minutes each time. For the analysis results, see Table 1 "Characteristic Ions and Retention Times of PAEs", image 3 Add 15 kinds of phthalate standard total ion chromatogram (1-DMP; 2-DEP; 3-DIBP; 4-DBP; 5-DMEP; 6-BMPP; 7-DEEP; 8-DPP; 9-DHP; 10-BBP; 11-DBEP; 12-DCHP; 13-DEHP; 14-DOP; 15-DNP), and Figure 4 The total ion flow diagram of 15 kinds of phthalates in the actual sample atmospheric particulate matter sampling filter membrane is shown as follows:

[0043] Table I

[0044]

[0045] In summary, the system and method for measuring phthalates in atmospheric particulate matter of this patent have...

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Abstract

The invention provides a system and a method for determining phthalate in atmospheric particulates, and relates to environment-friendly monitoring method and equipment. The problem that the pollution is easily introduced in the laboratory analysis test process of phthalate is solved. The system comprises a to-be-determined sample adhered with atmospheric particulates, a desorption tube, a heating device, an inert gas flow mechanism, a collecting trap mechanism, a liquid nitrogen cooling mechanism, a chromatographic column and a mass spectrometry detector. The method comprises the following steps: heating the desorption tube filled with the to-be-determined sample; brining to-be-determined component released from the to-be-determined sample into the collecting trap mechanism to cool and enrich by using the inert gas flow; heating the collecting trap mechanism, and brining the desorbed to-be-determined component into the chromatographic column by using the inert gas flow; performing chromatographic separation on the desorbed to-be-determined component by using the chromatographic column; and detecting the phthalate in the atmospheric particulates according to the chromatographic separation result obtained by the chromatographic column by using the mass spectrometry detector.

Description

【Technical field】 [0001] The present invention relates to an environmental protection monitoring experiment method and equipment, especially a system and method for measuring phthalates in atmospheric particulate matter 【Background technique】 [0002] Phthalic acid esters (Phthalic acid esters or Phthalate esters) abbreviated as PAEs, also known as phthalates, is a general term for esters formed by phthalic acid, and is one of the environmental hormones. With a faint peculiar smell, it is not volatile at room temperature, and it is a colorless oily viscous liquid. It is generally insoluble in water and easily soluble in organic solvents. When used as a plastic plasticizer, it generally refers to the ester of phthalic acid and alcohols with 4 to 15 carbons. PAEs is an indispensable modification additive in plastics, and its content can sometimes reach 50% of the final product. In plastic products, phthalates are not polymerized into the matrix of the plastic, and there is n...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/08
Inventor 王小菊刘保献张大伟
Owner BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENT
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