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Method for simultaneously detecting content of water-soluble anions and cations in atmospheric particulate matters through rapid solvent extraction-ion chromatography

A technology of atmospheric particulate matter and ion chromatography, which is applied in the field of rapid solvent extraction-ion chromatography to simultaneously detect the content of water-soluble anions and cations in atmospheric particles, which can solve the problems of long-term ultrasonic extraction process environmental impurities and achieve high accuracy , Less solvent consumption, good reproducible effect

Pending Publication Date: 2021-12-10
TAIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The common analysis method for water-soluble anions and cations in atmospheric dust is ultrasonic extraction-ion chromatography. Ultrasonic extraction takes a long time and is easy to introduce impurities in the process environment.
The shortcomings of ultrasonic extraction can be avoided by using the fast solvent method. The analysis method of fast solvent extraction-ion chromatography for the simultaneous analysis of water-soluble anions and cations in atmospheric dust particles has not been reported yet.

Method used

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  • Method for simultaneously detecting content of water-soluble anions and cations in atmospheric particulate matters through rapid solvent extraction-ion chromatography
  • Method for simultaneously detecting content of water-soluble anions and cations in atmospheric particulate matters through rapid solvent extraction-ion chromatography
  • Method for simultaneously detecting content of water-soluble anions and cations in atmospheric particulate matters through rapid solvent extraction-ion chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Simultaneous analysis of 12 water-soluble anions and cations by fast solvent extraction ion chromatography

[0035] 1. Sample collection and pretreatment

[0036] Before sampling, soak the quartz fiber filter membrane in ultrapure water for 20-30min, twice. Then put it into an oven to dry, and then put it into a desiccator to cool and balance for 24 hours. Take the above filter membrane and install it in a particle sampler. In the dust sampling mode, the flow rate is set to 100L / min, and the sampling time is 12h.

[0037] After the sampled quartz fiber filter membrane is placed in a desiccator to balance for 24 hours, use clean ceramic scissors to cut the filter membrane along the diameter direction, cut the filter membrane into a fan shape, take 1 / 4 piece and put it into a 33mL stainless steel extraction pool . Under the set mode, the temperature is 80 degrees centigrade, the extraction pressure is 1500 psi, and the extraction is performed twice, 5 minutes ...

Embodiment 2

[0043] Embodiment 2 precision experiment

[0044] Take low, medium and high concentrations of 6 kinds of anion mixed standard solutions and 6 kinds of cation standard solutions dropwise on the filter membrane after sampling pretreatment, after sample pretreatment, analyze under analytical chromatographic conditions, each Each concentration was paralleled 7 times, and the relative standard deviation (RSD) was calculated, as shown in Table 2.

[0045] Table 2 Water-soluble ion precision test results

[0046]

[0047]

[0048] It can be seen from the table that the anion standard deviations of low, medium and high concentrations are between 0.0019 and 0.1264mg / L, and the relative standard deviations are between 0.7% and 19.7%. - In addition, the precision of each group is relatively good. The standard deviation of cations is between 0.0081~0.0.2397mg / L, the relative standard deviation is between 0.7%~11.7%, and the precision of each group is relatively good.

Embodiment 3

[0049] Embodiment three standard addition recovery experiment

[0050] According to step 1, pre-sampling was carried out on the filter membrane, and the mixed standard solutions equivalent to 0.1mg / L, 2mg / L and 4mg / L after extraction were added dropwise respectively as the standard addition amount for the recovery test. The results are shown in Table 3.

[0051] Table 3 water-soluble ion recovery experimental results

[0052]

[0053] As can be seen from the table: the average recovery of 12 kinds of anions and cations is between 73.8% and 128.3%, except for Br - The external recoveries were all in the range of 70%-120%. The precision and recovery rate of standard addition show that the data measured by this method are more accurate and reliable.

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Abstract

The invention discloses a method for simultaneously detecting the content of water-soluble anions and cations in atmospheric particulate matters through a rapid solvent extraction-ion chromatography method, and relates to the field of atmospheric monitoring and detection.The technical scheme is characterized in that a rapid solvent extraction-ion chromatography method is used, and the method comprises the following steps: testing by a standard solution to obtain anion and cation standard spectrograms (Figure 1 and Figure 2) and a standard curve of a target compound, then pretreating a sample, testing on a machine, finding out a corresponding target peak by combining with the standard spectrograms, and calculating the concentration of the target compound according to the standard curve. According to the whole operation mode, the peak pattern of the target compound is sharp, the responsivity is high, the relative standard deviation is small, and the precision is relatively good, so that the test accuracy is effectively improved.

Description

technical field [0001] The invention relates to a rapid solvent extraction-ion chromatography method for simultaneously detecting the content of water-soluble anions and cations in atmospheric particles, which belongs to the field of analysis and detection. More specifically, the invention provides a method for detecting 12 kinds of water-soluble anions and cations in atmospheric dust Ion method, which is suitable for the detection of water-soluble ions in PM10, PM2.5 and other particulate matter in atmospheric dust. Background technique [0002] Atmospheric dust pollution has been a hot topic in my country in recent years. Studies have shown that fine particles can enter the human body through the respiratory system, causing great harm to the respiratory system and cardiovascular and cerebrovascular systems. With the increase of the state's monitoring and governance capabilities, the large-scale and continuous smog weather in my country has been better controlled. PM2.5 is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/96G01N30/06G01N30/14G01N30/04G01N30/64
CPCG01N30/96G01N30/06G01N30/14G01N30/04G01N30/64G01N2030/062G01N2030/146G01N2030/047G01N2030/645
Inventor 余彬彬严朝朝涂明阳张嫣秋徐方曦武承林
Owner TAIZHOU UNIV
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