QuEChERS solid-phase extraction device, preparation method of QuEChERS solid-phase extraction device and solid-phase extraction method
An extraction device and extraction technology are applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., which can solve the problems of high pre-treatment labor cost, complicated operation process, difficult automatic operation and batch processing, etc., to achieve Improve the detection sensitivity and recovery rate, simplify the operation process, and avoid the effect of instrument contamination
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[0061] Example 1:
[0062] New and improved QuEChERS solid phase extraction column containing graphitized carbon solid adsorbent (referred to as SQ1 column)
[0063] (1) SQ1 column preparation (press image 3 Structural assembly shown):
[0064] The solid adsorbent (150mg PSA and 15mg graphitized carbon mixture) and 1.5g water absorbing material (diatomite) filler are packed into a 3mL column tube. A piece of porous polypropylene is provided in the upper, middle and lower positions of the column cavity. The sieve plate separates the column tube into two upper and lower packing chambers. The lower chamber of the column tube is made of adsorbent material, and the upper chamber is made of water-absorbing material. The SQ1 column is obtained according to a specific ratio.
[0065] (2) The application of SQ1 column in the detection of 12 kinds of carbamates such as oxamethoxin in honey:
[0066] It is used for sample pre-treatment and purification for the detection of 12 carbamates such as ...
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[0075] Example 2:
[0076] New and improved QuEChERS solid phase extraction column containing PSA porous modified adsorbent (denoted as SQ2 column)
[0077] (1) Preparation of PSA porous modified adsorbent:
[0078] Thermoplastic polymer resin: UHMWPE, molecular weight is about 3.5 million, particle size is 80-120 mesh.
[0079] Solid adsorbent: PSA, particle size is 60μm, pore size is
[0080] 1) Add 70% UHMWPE and 30% PSA into the container in sequence, and mix them evenly to obtain spare raw materials;
[0081] 2) Adopt an aluminum mold with several holes with a diameter of 9.1mm and a height of 5.2mm. The spare raw materials are evenly added to the holes and compressed and shaken flat;
[0082] 3) After sintering at 165°C for 25 minutes and then cooling to obtain PSA porous modified adsorbent material.
[0083] (2) Preparation of SQ2 column (according to Figure 4 Structural assembly shown):
[0084] Load the modified PSA solid adsorbent material and 1.5 g of water-absorbing material (...
Example Embodiment
[0094] Example 3:
[0095] New and improved QuEChERS solid phase extraction column containing PEP porous modified adsorbent (denoted as SQ3 column)
[0096] (1) Preparation of PEP porous modified adsorbent:
[0097] Thermoplastic polymer resin: UHMWPE, molecular weight is about 2.8 million, particle size is 70-100 mesh.
[0098] Solid adsorbent: PEP, the particle size is 70μm, the pore size is
[0099] 1) Add 75% of UHMWPE and 25% of PEP to the container in sequence, and mix well to obtain spare raw materials;
[0100] 2) Adopt an aluminum mold with several holes with a diameter of 9.1mm and a height of 5.2mm. The spare raw materials are evenly added to the holes and compressed and shaken flat;
[0101] 3) Sintering at 180°C for 25 minutes and then cooling to obtain PEP porous modified adsorbent material.
[0102] (2) Preparation of Q3 column (press Figure 4 Structural assembly shown):
[0103] The modified PEP adsorbent material and 1.0g of water-absorbing material (diatomite accounted f...
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