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Passiveness sampling method

A passive sampler, hollow technology, applied in sampling devices, instruments, measuring devices, etc., to achieve the effect of low cost, low production cost, and reduced sample volume

Inactive Publication Date: 2009-06-03
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is in order to overcome the defective of above-mentioned existing passive sampling method, thereby provide a kind of very high sampling rate and can be convenient to use with HPLC, the passive sampling method with good stability and repeatability

Method used

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  • Passiveness sampling method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0027] Such as figure 1 As shown, adopt the method provided by the invention to collect bisphenol A in environmental water sample 1, concrete steps are as follows:

[0028] (1) Fill the inner cavity of the cut 5mm length polypropylene hollow fiber membrane section with water;

[0029] (2) Soak the polypropylene hollow fiber membrane section filled with water in the inner cavity for 5 seconds in n-octanol, so that the micropores on the membrane wall of the polypropylene hollow fiber membrane section are filled with n-octanol to form a hollow fiber support Liquid film passive sampler 2;

[0030] (3) The hollow fiber-supported liquid membrane passive sampler 2 is taken out from n-octanol, and placed in water for cleaning to remove excess n-octanol adsorbed on its surface;

[0031] (4) Submerge the cleaned hollow fiber supported liquid membrane passive sampler 2 in the sample solution 1 to be sampled for 20 minutes to complete the sampling;

[0032] (5) Take out the passive sam...

Embodiment 2

[0036] In this embodiment, the hydrophobic hollow fiber membrane is selected from a 5 mm polyvinylidene fluoride hollow fiber membrane section, the water-insoluble organic solvent is selected from n-undecane, and the polyvinylidene fluoride hollow fiber membrane section filled with water in the inner cavity Soak in n-undecane for 60 seconds, the target substance is nonylphenol in the environmental water sample, the hollow fiber supported liquid membrane passive sampler is immersed in the environmental water sample for 1 day, and the target substance can be sampled from The solvent that dissolves out in the device selects normal hexane, and others are identical with embodiment 1.

Embodiment 3

[0038] In this embodiment, the hydrophobic hollow fiber membrane is selected from a 5mm polytetrafluoroethylene hollow fiber membrane section, the water-insoluble organic solvent is selected from n-hexyl ether, and the polytetrafluoroethylene hollow fiber membrane section filled with water in the inner cavity is Soak in n-hexyl ether for 30 seconds, the target substance is nonylphenol in the environmental water sample, the hollow fiber supported liquid membrane passive sampler is immersed in the environmental water sample for 2 days, the other is the same as in Example 1.

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Abstract

The invention relates to a hollow fiber liquid film negative sampling method, the steps include: the hydrophobic hollow fiber film filled with water is soaked in lipid or non-aqueous organic solvent, and the microspore on the wall of hollow fiber film is filled with lipid or non-aqueous organic solvent to get the hollow fiber liquid film negative sampler; and the sampler is cleaned, and soaked in the sample liquid; the sampler is soaked in the air-tight container which is filled with solvent which can dissolve the target material from target material, and the target material with the negative sampler is resolved to said solvent to finish sampling. The sampling method has advantages of are microminiaturization, flexibility, low cost, and high sampling speed, and it can be used to combine with the detecting device of liquid chromatogram, and the stability and reputation are good.

Description

technical field [0001] The invention relates to a passive sampling method, in particular to a passive sampling method for a liquid membrane supported by a hollow fiber. Background technique [0002] The background and development status of this technical field are roughly as follows: J.N.Huckins and others first packed lipids in low-density polyethylene film bags as passive samplers for monitoring hydrophobic organic pollutants, and they named the technology semi-permeable membranes Sampling device (hereinafter referred to as SPMD). Davison et al. invented the diffusion gradient film (hereinafter referred to as DGT) technology, which is used to collect biologically effective metal ions and certain inorganic anions. These two passive samplers are larger in size, larger in sampling phase volume and enrichment multiple, and require a larger sample volume and a long time to reach equilibrium, and are generally used for dynamic sampling that is far from equilibrium. [0003] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/06G01N1/02
Inventor 刘景富胡霞林江桂斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI