Fiber filtering membrane solid-liquid microextraction method and device

A fiber filter membrane and filter membrane technology, which is applied in the field of extraction of target analytes, can solve problems such as difficulty, poor reproducibility, and complicated operation of liquid-phase microextraction technology, so as to solve volatilization and loss, and simplify complex processes and devices. , the effect of improving the detection sensitivity

Inactive Publication Date: 2013-09-11
SHANXI MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the above-mentioned liquid phase microextraction techniques all have disadvantages such as complex operation, difficulty, and poor reproducibility.

Method used

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  • Fiber filtering membrane solid-liquid microextraction method and device
  • Fiber filtering membrane solid-liquid microextraction method and device
  • Fiber filtering membrane solid-liquid microextraction method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Solid / liquid microextraction simultaneously concentrates three kinds of phenylacrylic acid compounds

[0038] 1. The present invention combines high performance liquid chromatography to simultaneously concentrate three kinds of phenylacrylic acid compound reference substances

[0039] Take a 10mL vial with a rubber cap, add 1.0mL reference substance mixed solution (the concentration of the three phenylacrylic acid compound reference substances is 8 μg / mL), 1.2g NaCl and 9 mL 0.1 mol / L HCl solution, to make the phase solution pH=1. Put in a stir bar (8 mm×4 mm) and place it on a magnetic stirrer. Cut the washed and dried organic filter membrane into small pieces of 1 cm square, soak it in heptanol for 30 s, take it out with tweezers, and gently press the filter membrane on the absorbent paper to wipe off the excess extraction on the surface of the filter membrane. solvent. Insert the needle of the microsyringe vertically into the rubber cap of the vial, cla...

Embodiment 2

[0049] Example 2 Solid / Liquid Microextraction Simultaneous Concentration of 5 Kinds of Proberberine-Type Alkaloids

[0050] 1. Simultaneous concentration of five original berberine-type alkaloid reference substances by membrane / solvent-solid / liquid microextraction combined with high performance liquid chromatography

[0051] Take a 10 mL vial with a rubber cap, add 1.0 mL of the reference substance mixed solution (the concentration of the five alkaloid reference substances is 8 μg / mL) and 1×10 -3 9 mL of mol / L NaOH solution to make the pH of the donor phase solution = 11. Put a stir bar (8 mm × 4 mm) on a magnetic stirrer. Cut the washed and dried organic filter membrane into small pieces of 1 cm square, soak it in heptanol for 30 s, take it out with tweezers, and gently press the filter membrane on the absorbent paper to wipe off the excess extraction on the surface of the filter membrane. solvent. Insert the needle of the micro-syringe vertically into the rubber cap, cl...

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Abstract

The invention discloses a fiber filtering membrane solid-liquid microextraction method and a device. The fiber filtering membrane solid-liquid microextraction method comprises the following steps that: fiber filtering membranes cut into small pieces are put into a extracting solvent, so as to be soaked and ensure that micropores are filled with solvent; the filtering membranes filled with the solvent are put into a sample solution, so that target analyte is extracted; the filtering membranes are taken out after the extraction; the target analyte on the filtering membranes is dissolved through the solvent or solution; assay determination is performed. The solid-liquid microextraction method is simple and rapid, with a low organic solvent use level and high enrichment multiple, and is applied to the extraction, separation, purification and concentration of trace target analyte in complex samples.

Description

technical field [0001] The invention relates to the pretreatment of analytical chemical samples, in particular to a method and a device for extracting target analytes from sample solutions. Background technique [0002] As a sample pretreatment method integrating sampling, extraction and concentration, micro-extraction technology is simple, fast, environmentally friendly and efficient. [0003] Solid-phase microextraction is generally a synthetic polymer material or molecularly imprinted polymer coated on a specific support, using the active center of the polymer coating or the special selectivity of the molecularly imprinted polymer to a specific template molecule or imprinted molecule Extract and concentrate the target analytes in the sample. It can be seen that surface coating solid phase microextraction requires synthesis or preparation of coatings and special techniques for coating coatings. [0004] Microporous membrane microextraction is a microporous membrane made ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/34G01N1/40
Inventor 陈璇白小红邢荣荣张丽莎
Owner SHANXI MEDICAL UNIV
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