Water body heavy metal semi-quantitative analysis method based on X ray fluorescent spectroscopy

A fluorescence spectrum and quantitative analysis technology is applied in the field of semi-quantitative analysis of heavy metals in water based on X-ray fluorescence spectrum analysis, which can solve the problems of complex, time-consuming and labor-intensive detection of heavy metals, and achieve the effect of fast and simple determination.

Inactive Publication Date: 2017-10-20
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to: provide a semi-quantitative analysis method for heavy metal content in water body environment, in order to realize the fast and simple measurement of heavy metal content in water body environment, overcome the problem of complex, time-consuming and laborious detection of heavy metal in existing water body samples

Method used

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  • Water body heavy metal semi-quantitative analysis method based on X ray fluorescent spectroscopy
  • Water body heavy metal semi-quantitative analysis method based on X ray fluorescent spectroscopy
  • Water body heavy metal semi-quantitative analysis method based on X ray fluorescent spectroscopy

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Indoor detection of single heavy metal M content in water samples

[0027] 1) Calibration:

[0028] a) Loosen the buckle D of the water sample collector, take the end of the fixed tenon C as the fixed end, lift the end of the frame A close to the buckle D, and leave the base B; take a 0.6mm thick filter paper and place it on the sampler Between the frame A and the base B; put down the hook D end of the raised frame A, so that A and B are close together, and fix the snap D, so that the filter paper is firmly fixed on the frame A of the water sample collector between base B;

[0029] b) Put the water sample collector into the heavy metal M standard solution with a concentration of 500mg / L, so that the filter paper is completely submerged in the standard solution for 30 seconds to 3 minutes, take it out, stand on its side, and drain for 30 seconds to 3 minutes;

[0030] c) Use an X-ray fluorescence (X-ray fluorescence, XRF) spectrometer to measure the heavy metal M conte...

Embodiment 2

[0039] Field detection of single heavy metal M content in water samples

[0040] 1. Calibration:

[0041] a) Loosen the buckle D of the water sample collector, take the end of the fixed tenon C as the fixed end, lift the end of the frame A close to D, and leave the base B; take a 0.6mm thick filter paper and place it on the frame A of the sampler Between the frame A and the base B; put down the hook D end of the frame A, so that the frame A and the base B are close together, and fix the loop D, so that the filter paper is firmly fixed on the frame A of the water sample collector and base B;

[0042] b) Put the water sample collector into the heavy metal M standard solution with a concentration of 500mg / L, so that the filter paper is completely submerged in the standard solution for 30 seconds to 3 minutes, take it out, stand on its side, and drain for 30 seconds to 3 minutes;

[0043] c) Use an X-ray fluorescence (X-ray fluorescence, XRF) spectrometer to measure the heavy me...

Embodiment 3

[0053] Field detection of various heavy metals in water samples

[0054] 1. Calibration:

[0055] a) Loosen the buckle D of the water sample collector, take the end of the fixed tenon C as the fixed end, lift the end of the frame A close to the buckle D, and leave the base B; take a 0.6mm thick filter paper and place it on the sampler Between the frame A and the base B; put down the hook D end of the frame A, so that the frame A and the base B are close together, and fix the loop D, so that the filter paper is firmly fixed on the water sample collector Between frame A and base B;

[0056] b) Put the water sample collector into the mixed standard solution of the heavy metal to be tested with a concentration of 500mg / L, so that the filter paper is completely immersed in the standard solution for 30 seconds to 3 minutes, take it out, stand on its side, and drain for 30 seconds to 3 minutes ;

[0057] c) Use an X-ray fluorescence (X-ray fluorescence, XRF) spectrometer to measur...

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Abstract

The invention discloses a water body heavy metal semi-quantitative analysis method based on X ray fluorescent spectroscopy. The method comprises the following steps: a) drawing a calibration curve with a to-be-detected heavy metal standard liquid; b) collecting a water sample by adopting a water sample collector; c) analyzing the sample collected in the step b) by adopting an XRF spectroanalysis instrument; and d) calibrating a numerical value measured in the step c) by adopting the calibration curve obtained in the step a), so that heavy metal content of the water sample is obtained. The method disclosed by the invention has the advantages that the water sample is adsorbed to a piece of a solid adsorbent filter paper by using the water sample collector, and then an XRF instrument is used for detecting heavy metals attached to the filter paper, so that quick and simple determination on the heavy metals in a water body is realized, and a rapid and effective detection means is provided for environmental monitoring; the method is applicable to detection of the water sample which is polluted by multiple heavy metals such as mercury, lead, chromium, nickel and arsenic and is in a certain concentration range; and the method disclosed by the invention is based on an XRF method, the analysis sensitivity of the method is influenced by the XRF instrument, and calibration by virtue of a standard solution needs to be carried out before the method disclosed by the invention is used.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and relates to a rapid detection and semi-quantitative analysis method for heavy metals in water, in particular to a semi-quantitative analysis method for heavy metals in water based on X-ray fluorescence spectrum analysis. Background technique [0002] At present, the instrumental analysis methods of heavy metal elements in water mainly include atomic absorption method, inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) and so on. Although these methods are relatively mature, they all require complex pretreatment of samples, and have disadvantages such as complicated operation steps, high cost, time-consuming, and the reagents used are toxic to the environment. [0003] X-ray fluorescence (X-ray fluorescence, XRF) spectroscopic analysis is a promising and potential detection technology for the detection of heavy metals....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
CPCG01N23/223G01N2223/076G01N2223/637
Inventor 陈小华沈根祥赵庆节钱晓雍胡双庆汤正泽顾海蓉
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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