Systems and methods for real-time monitoring of chemical samples

A chemical sample and sample technology, which is applied in the field of pre-concentrated chemical sample systems, can solve problems such as compound misidentification, and achieve the effect of eliminating channeling effects

Pending Publication Date: 2022-05-27
ENTECH INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Without the use of mass spectrometry to identify and separate target VOCs from other interfering compounds, systems relying on dual FID analyzers can suffer from positive bias as compounds are misidentified

Method used

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  • Systems and methods for real-time monitoring of chemical samples
  • Systems and methods for real-time monitoring of chemical samples
  • Systems and methods for real-time monitoring of chemical samples

Examples

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Embodiment Construction

[0018] In the following description, reference is made to the accompanying drawings, which form a part hereof, and in which specific examples that may be practiced are shown by way of illustration. It is to be understood that other examples may be utilized and structural changes may be made without departing from the scope of the examples of the present disclosure.

[0019] figure 1 An exemplary block diagram of a system 100 for pre-concentrating and analyzing various compounds in a chemical sample by gas chromatography is shown, according to one example of the present disclosure. figure 1 The system 100 includes a sample 102 , a first capture system 104 , a first detector 110 , a second capture system 124 , and one or more second detectors 120 . In some embodiments, additional or alternative components are possible. Additionally, the system 100 can be modified to include the following references Figure 2A - one or more of the components described in C.

[0020] exist ...

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Abstract

Systems and methods are provided that improve the measurement of trace volatile chemicals, such as by gas chromatography (GC) and gas chromatography/mass spectrometry (GCMS). The first capture system may include a plurality of capillary columns in series and an enrichment column fluidly coupled to a first detector. The first trapping system may retain and separate compounds in the sample, including C3 hydrocarbons and heavier compounds than C3 hydrocarbons (e.g., C12 highest hydrocarbons, or compounds having a boiling point of about 250 DEG C), and may transfer the compounds from the enrichment column to a first detector. A second trapping system may receive the compound that is not retained by the first trapping system, and may include a fill trap and two columns. The second trapping system may remove water from the sample and may separate and detect compounds comprising C2 hydrocarbons and formaldehyde.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS [0002] This application claims priority to US Patent Application No. 16 / 593,934, filed on October 4, 2019, the contents of which are incorporated herein by reference in their entirety for all purposes. technical field [0003] The present invention relates to systems and methods for pre-concentrating chemical samples, and more particularly, to systems having a plurality of different kinds of traps for pre-concentrating and separating various compounds of a chemical sample into individual samples The flow was analyzed by gas chromatography. Background technique [0004] Analysis of volatile chemicals at low to sub-PPB levels in air or other matrices may require pre-concentration of the sample prior to injection into a gas chromatograph (GC), as most detectors are not sensitive enough to analyze chemicals at sub-PPB levels. Volatile chemicals can be measured in outdoor and indoor air to determine their risk to the populations ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/08G01N30/10G01N30/40G01N30/46G01N30/60G01N30/72G01N30/88
CPCG01N30/06G01N30/08G01N30/10G01N30/40G01N30/461G01N30/462G01N30/466G01N30/6073G01N30/6078G01N30/7206G01N30/88G01N2030/085G01N2030/402G01N2030/407G01N2030/8854B01D15/1871
Inventor D·B·卡丁
Owner ENTECH INSTR INC
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