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Method for detecting heavy metal As (III) in natural water body

A natural water body and detection method technology, which is applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, can solve the problems of complex and easy agglomeration of modified materials, low utilization of active sites, and poor repeatability, etc., to achieve repeatability Good performance, good sensitivity and recovery, and easy control of conditions

Active Publication Date: 2021-12-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In view of this, in order to solve the problems of instability, poor repeatability, complex modification materials, easy to agglomerate and easy to fall off, and low utilization of active sites in the electrochemical detection of heavy metal As(III), the present invention provides a method for detecting heavy metals in natural water. The electrochemical detection method of As(III) promotes the practical application of this detection method in the field of natural water body detection

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  • Method for detecting heavy metal As (III) in natural water body
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  • Method for detecting heavy metal As (III) in natural water body

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[0029] In order to facilitate the understanding of the present invention, the following will describe the present invention more fully in conjunction with specific embodiments and accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0030]Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

[0031] The raw material specific information that adopts in the embodiment is as follows:

[0032] Anhydrous Ferric Chloride, [FeCl 3 , ...

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Abstract

The invention discloses a method for detecting heavy metal As (III) in a natural water body. The method comprises the following steps of pretreating the obtained natural water body, adding a detection reagent (NaAc, HAc and FeCl3), pre-polishing a glassy carbon electrode, constructing a three-electrode system, detecting an electrochemical signal by using square wave anodic stripping voltammetry, drawing a linear calibration curve corresponding to peak current and As (III) concentration, a standard addition method being used for detecting the recovery rate of As (III) in a natural water body, and the recovery rate meeting the underground water quality standard GB / T 14848-2017:IV type water quality standard specified by the national standard of the People's Republic of China. According to the method, a simple unmodified glassy carbon electrode is used, and the heavy metal As (III) (GB / T 14848-2017:class IV standard) below 50ppb can be detected only by adding the detection reagent into the filtered natural water body. Compared with a synthetic electrode surface modification material for detecting As (III), the method is simpler, more convenient, more practical, more economical, good in repeatability and stability and suitable for rapid detection of non-professional technical operators.

Description

technical field [0001] The invention relates to the technical field of water quality detection, in particular to a method for detecting heavy metal As(III) in natural water bodies. Background technique [0002] The pollution of heavy metal ions has become increasingly prominent, posing a great threat to the life, health and safety of animals, plants and human beings. The main form of arsenic in natural groundwater and surface water is inorganic H 3 AsO 3 、H 3 AsO 4 、HAsO 4 2- Among them, As(III) has a very low content in drinking water but is highly toxic. According to the national standard of the People's Republic of China, the groundwater quality standard GB / T 14848-2017: Class IV, the content of As(III) should not exceed 50ppb. Therefore, a fast, simple, efficient and convenient detection method is urgently needed to detect the concentration of heavy metal As(III) in natural water bodies. [0003] Due to the harmfulness and severity of heavy metal ions, the current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30G01N27/403
CPCG01N27/26G01N27/308G01N27/403Y02A20/20
Inventor 黄行九蔡鑫林楚红
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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