Extraction head detachable type solid phase micro extraction probe and preparation method thereof
An extraction head and detachable technology, applied in the field of analytical chemistry, can solve the problems of high cost, easy breakage, high analysis cost, and achieve the effects of strong operability and reliability, high sensitivity and reproducibility, and simple preparation process.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0036] Preparation of the extraction head detachable solid-phase microextraction probe:
[0037] Cut a 1cm polydimethylsiloxane (PDMS) tube (inner diameter 0.2mm,) for use; cut about 2.5cm of steel wire with a diameter of 0.1mm, immerse it in acetone for ultrasonic cleaning, take it out and dry it for use; coat one end of the steel wire with Cover with a very thin layer of high-temperature epoxy resin glue, insert the PDMS tube into the steel wire and stick it firmly to make the extraction head. Coat high-temperature epoxy resin, quickly pull it out from the perforated rubber septum, and then cover the steel wire with a very thin layer of glue, and then quickly put it on the PDMS tube; use small pliers to flatten the inner tube of the SPME probe Form a depression, the degree of flattening the tweezers makes the gap span inside the depression = the diameter of the steel wire × 0.9, so that the steel wire can pass through the flattened place of the tweezers and be stuck, and it ...
Embodiment 2
[0044] Preparation of the detachable solid-phase microextraction probe The preparation is as in Example 1.
[0045] Accurately prepare 20mL of BTEX aqueous solution with a concentration of 1mg / L, use commercial 30μm PDMS fiber and the detachable solid-phase microextraction probe, and conduct headspace extraction for 20min under magnetic stirring at a speed of 1500r / min. After taking it out, insert Thermal analysis was carried out in the GC inlet for 1 min, and the MS spectrum was obtained (as shown in Figure *). Comparing the peak areas of the two compounds, it is known that the detachable SPME probe has a better extraction effect than the commercial 30 μm PDMS fiber. The chromatographic conditions are the same as in Example 1. The results are shown in Table 2 and image 3 shown.
[0046] Table 2 Data table of BTEX peak area extracted by self-made needle and commercial needle
[0047]
[0048]
[0049] The results showed that repeating the above experiments with a cu...
Embodiment 3
[0051] Preparation of detachable solid-phase microextraction probe with extraction head: cut a 1cm polydimethylsiloxane (PDMS) tube (inner diameter 0.2mm) for use; cut about 2.0cm of metal wire with a diameter of 0.1mm, dip it into Ultrasonic cleaning in acetone, take it out and dry it for later use; coat one end of the wire with a very thin layer of high-temperature epoxy resin glue, put the PDMS tube into the wire and stick it to make the extraction head, the specific method is: put the metal The wire is inserted into the rubber septum that has been inserted into the hole with a micro-syringe in advance, and high-temperature epoxy resin is coated on the metal wire, and it is quickly pulled out from the rubber septum with holes to cover the wire with a very thin layer of glue. Then quickly put on the PDMS tube; slightly bend the free metal wire of the self-made extraction head with tweezers to form two bends, and the distance from the outermost part of the bent part to the lon...
PUM
Property | Measurement | Unit |
---|---|---|
length | aaaaa | aaaaa |
length | aaaaa | aaaaa |
diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com