Method of measuring concentration of suspend-dispersed fullerene in natural water body

A technology of fullerene and spectrophotometry, applied in the field of environmental science, can solve problems such as failure to meet the needs of routine detection, low accuracy and precision, cumbersome methods or steps, etc., to promote in-depth research on water environmental behavior and biological toxicity The effect of developing, improving precision and accuracy, and reducing system and human errors

Active Publication Date: 2017-07-14
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

But this kind of determination method all exists the fullerene in the water sample (C 60 ) through liquid-liquid extraction into toluene and organic phase separation. The operation is cumbersome and takes a long time. It requires high experimental skills of analysts, and there are obvious differences in the analysis results between different operators.
[0008] Generally speaking, the above methods or steps are cumbersome and have low accuracy and precision; or require large-scale high-value instruments, which cannot meet the needs of routine testing
On the other hand, the existing methods are all artificially prepared fullerenes (C 60 ) stable suspension as the object, and determine the fullerene contained in it (C 60 ) content; for fullerene (C 60 ) into the water environment, under the action of natural organic matter, the fullerene (C 60 ) concentration and there is no corresponding method for rapid and accurate determination

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  • Method of measuring concentration of suspend-dispersed fullerene in natural water body
  • Method of measuring concentration of suspend-dispersed fullerene in natural water body
  • Method of measuring concentration of suspend-dispersed fullerene in natural water body

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Embodiment 1

[0043] Adopt the method of the present invention to measure and contain suspended dispersion fullerene (C 60 ) of a surface water sample. The water sample was directly added fullerene (C 60 ), and placed on a magnetic stirrer for rapid stirring for 1 week and then left to stand, and the supernatant was obtained by filtering with a 0.22 μm microfiltration membrane. Take 10 parallel samples, respectively operate according to step (8) in the above-mentioned embodiment, measure the absorbance, calculate the absorbance difference, and then substitute into the natural water suspended and dispersed fullerene (C 60 ) liquid standard working curve, calculated fullerene in water samples (C 60 ) concentration, the results are shown in Table 1. As can be seen from Table 1, the method proposed by the present invention measures the sample concentration standard deviation and the relative standard deviation are small, and the method has better precision.

[0044] Table 1 The present inve...

Embodiment 2

[0058] Adopt step (1)-step (6) that the present invention proposes, get the standard fullerene (C 60 ) stable dispersed aqueous solution in a 25mL colorimetric tube, and add an appropriate amount of representative natural organic matter - humic acid (HA) at the same time, and then make the volume to 25mL, dilute the original suspension stable solution by 2, 4, 5, 10, 20 times, And make the concentration of natural organic matter 2mg / L; measure 344nm (λ 2 ) with 255, 265, 275, 285, 295 and 305 nm (λ 1 ) at the UV absorbance value, denoted as A 2 with A 1 , and put into the formula ΔA=A 2 -0.1A 1 、ΔA=A 2 -0.2A 1 、ΔA=A 2 -0.3A 1 、ΔA=A 2 -0.4A 1 、ΔA=A 2 -0.5A 1 、ΔA=A 2 -0.6A 1 and ΔA=A 2 -0.7A 1 , calculate the absorbance difference ΔA. According to the linear fitting of each concentration and the corresponding absorbance difference ΔA value, the suspension and dispersion of fullerene in natural water under different calculation conditions (C 60 ) liquid standard...

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Abstract

The invention discloses a method of measuring concentration of suspend-dispersed fullerene in a natural water body, wherein the method includes the steps of: 1) establishing a fullerene-toluene solution standard working curve; 2) measuring standard concentration of a stable fullerene dispersed water solution; 3) establishing a simulative standard working curve of fullerene concentration in a natural water body by means of a dual-wavelength ultraviolet spectrophotometry method; and 4) calculating the concentration of the suspend-dispersed fullerene in the to-be-tested natural water body by means of the simulative standard working curve of fullerene concentration in a natural water body in the step 3). The method is effective in measurement of the concentration of suspend-dispersed fullerene (C60) in a natural water body, and can promote deep development of researching on water environment behavior and biotoxicity of the fullerene (C60) in the field of environmental science and technology.

Description

technical field [0001] The invention belongs to the field of environmental science and technology, and specifically relates to a method for analyzing suspended and dispersed fullerenes (C 60 ) concentration method. Background technique [0002] Fullerene (C 60 ) is the first artificially synthesized nanomaterial, known as "the pioneer of materials in the 21st century". It has attracted much attention because of its unique micro-nano structure and excellent mechanical, electro-optical and chemical properties. One of the new nanomaterials. At present, fullerenes are gradually entering people's lives from the initial high-end applications, which will bring huge changes to human life. But at the same time, fullerenes may enter the water environment during the whole life cycle of preparation, use and disposal, making their distribution in water bodies increase rapidly. When fullerene enters the water environment, all kinds of impurities contained in natural water, especially...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N1/34
CPCG01N1/34G01N21/33
Inventor 方华丁晓磊王鋙葶章婷婷曹惠忠
Owner NANJING UNIV OF INFORMATION SCI & TECH
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