Sample injection method for measuring non-polar organic matters on divided-particle-size aerosol samples by TD-GCMS

A non-polar and organic technology, applied in the field of non-polar organics injection on particle size aerosol samples, it can solve the problems of increased human error and poor experimental parallelism, avoiding waste and enhancing parallelism. , the effect of clear operation ideas

Inactive Publication Date: 2019-10-18
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] For aerosol samples regardless of particle size, a circular punch (Punch) is generally used to cut a certain area from the filter membrane (constant area method) for analysis; while using TD-GCMS to analyze the particle size samples , but the constant area method is not applicable, the main reason is that the samples with different particle sizes are distributed in uniform and discrete dots on the filter membrane, and there are relatively large blank areas between the dots. When the injection volume is small, The constant area method is likely to lead to an increase in human error and poor experimental parallelism

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  • Sample injection method for measuring non-polar organic matters on divided-particle-size aerosol samples by TD-GCMS
  • Sample injection method for measuring non-polar organic matters on divided-particle-size aerosol samples by TD-GCMS
  • Sample injection method for measuring non-polar organic matters on divided-particle-size aerosol samples by TD-GCMS

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 2 As shown, since the atmospheric particles collected by the particle size collector are uniformly and discretely distributed on the filter membrane, when the TD-GCMS method is used to measure the sample, when the sample is clipped by the constant area method, it will be due to There is a relatively large blank area between discrete points, which increases human error. Therefore, the present invention uses fixed-point sampling.

[0022] The specific steps of the sampling method of the TD-GCMS of the present invention to measure the non-polar organic matter on the particle size aerosol sample are as follows:

[0023] (1) According to the grade of the filter membrane and the degree of cleanliness (that is, the number of adsorbed samples on it), determine the number of shearing points required.

[0024] Generally, the number of sample points cli...

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Abstract

The invention discloses a sample injection method for measuring non-polar organic matters on divided-particle-size aerosol samples by TD-GCMS. The sample injection method comprises the following steps: collecting and analyzing the samples collected on filter membranes after particle size division according to sample points. The method is clear in operation concept; and a fixed-area method is converted into a fixed-point number method, so that the accuracy of a sample injection amount can be guaranteed.

Description

technical field [0001] The invention relates to a sampling method for non-polar organic matter on an aerosol sample with different particle sizes. Background technique [0002] Atmospheric particulate matter is the main pollutant that endangers human health and affects the quality of the atmospheric environment. It plays an important role in global climate and environmental changes. These effects or effects are mainly related to its concentration, chemical composition and particle size distribution. When studying atmospheric aerosols, a sampler is usually used to collect the aerosols on a certain carrier, and then use different means to analyze and measure the aerosol samples according to different purposes. Quartz filter membranes are commonly used aerosol sample carriers. There are two ways to collect aerosol samples: particle size and non-particle size: particle size-free sample refers to collecting all atmospheric particles within a certain aerodynamic diameter (Dp) on a...

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Application Information

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IPC IPC(8): G01N30/02G01N30/16
CPCG01N30/02G01N30/16
Inventor 曹芳张艺璇章炎麟宋文怀吴瑕
Owner NANJING UNIV OF INFORMATION SCI & TECH
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