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Device and method for detecting multiple elements and content thereof in water solution based on PGNAA (Prompt Gamma-Ray Neutron Activation Analysis) technology

A technology for detecting devices and aqueous solutions, which is applied to measuring devices, analyzing materials, and using wave/particle radiation for material analysis. It can solve problems such as high operating costs, complicated sample pretreatment procedures, and inability to perform multi-element analysis at the same time. The steps and the environment require simple effects

Active Publication Date: 2014-06-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some instruments need to be imported from abroad, which are expensive and costly to operate, and some cannot perform multi-element analysis at the same time, and the sample pretreatment procedure of some technologies is too complicated

Method used

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  • Device and method for detecting multiple elements and content thereof in water solution based on PGNAA (Prompt Gamma-Ray Neutron Activation Analysis) technology
  • Device and method for detecting multiple elements and content thereof in water solution based on PGNAA (Prompt Gamma-Ray Neutron Activation Analysis) technology
  • Device and method for detecting multiple elements and content thereof in water solution based on PGNAA (Prompt Gamma-Ray Neutron Activation Analysis) technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Measurements on chlorine elemental solutions

[0033] In this example, NaCl solution samples were used, and NaCl solutions with chlorine element mass concentrations of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% were prepared with distilled water. The energy spectrum was collected and analyzed by the prompt gamma ray neutron activation analysis technique. figure 2 The prompt gamma rays of the Cl element after deducting the influence of the environmental background are recorded, and it can be clearly seen that the energy spectra of Cl elements with different concentrations are significantly different under the same environment. Characteristic gamma rays of Cl element at 0.1, 0.2, 0.3, 0.4 and 0.5 wt% from low to high, respectively. image 3 It is a linear scale between characteristic peak count and element content, and its linear correlation coefficient is better than 0.995.

Embodiment 2

[0035] In this example, a sample of cadmium sulfate solution was used, and distilled water was used to prepare cadmium sulfate solutions with mass concentrations of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% of cadmium. The energy spectrum was collected and analyzed by the prompt gamma ray neutron activation analysis technique. Figure 4 The prompt gamma rays of the cadmium element after deducting the influence of the environmental background are recorded, and it can be clearly seen that the energy spectra of different concentrations of cadmium elements are significantly different under the same environment. The characteristic gamma rays of cadmium element are 0.1, 0.2, 0.3, 0.4 and 0.5wt% from low to high, respectively. Figure 5 It is a linear scale between the corrected characteristic peak count and element content, and its linear correlation coefficient is better than 0.995.

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Abstract

The invention discloses a device and a method for detecting multiple elements and content thereof in water solution based on a PGNAA (Prompt Gamma-Ray Neutron Activation Analysis) technology, and particularly relates to the device for detecting the content of multiple elements in the water solution by the PGNAA technology. The detection device comprises a sample detection system and an energy spectrum analysis system, wherein the sample detection system comprises an isotope neutron source, a polyethylene wrapping layer and a polyethylene bucket, the isotope neutron source is fixed at the center of the polyethylene wrapping layer, which is at the center of the polyethylene bucket, the energy spectrum analysis system comprises a gamma ray detector, a multichannel analyzer and an industrial control computer, the gamma ray detector clings to the middle high position on the outer wall of the polyethylene bucket, and the gamma ray detector is sequentially connected with the multichannel analyzer and the industrial control computer. Without a large increase in complex equipment, the method and the device can conveniently and accurately detect the content of multiple elements in the solution by the PGNAA technology.

Description

Technical field: [0001] The invention relates to a multi-element component and content detection device and detection method in aqueous solution based on PGNAA technology, belonging to the technical field of detection of element content in aqueous solution. Background technique: [0002] The highly sensitive detection of element content in water, especially the content of some toxic heavy metal elements has long been the focus of attention. At present, the technologies used in water pollution monitoring include atomic absorption spectrometry (AAS), inductively coupled plasma emission spectrometry (ICP / AES), mass spectrometry (ICP / MS), electrochemical analysis, and biological monitoring. [0003] At present, nuclear technology has become a routine technology in the field of measurement analysis. It has many advantages that other analysis techniques do not have. The PGNAA technique uses neutrons to bombard the target nucleus of the material to be tested, and releases the char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/222
Inventor 贾文宝黑大千凌永生单卿程璨
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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