Method for detecting multiple heavy metal elements simultaneously

A technology for heavy metals and elements, applied in the field of simultaneous detection of multiple heavy metal elements, can solve problems such as technical difficulties in detection and inconvenient automatic measurement

Inactive Publication Date: 2004-12-15
ZHEJIANG UNIV
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Problems solved by technology

Because the dynamic range of the heavy metal content contained in the solution sample collected in different fields is very wide, even in the same field, the dynamic range of the heavy metal content contained in the solution sampled at different times and different places is also inconsistent, which gives the actual The...

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  • Method for detecting multiple heavy metal elements simultaneously
  • Method for detecting multiple heavy metal elements simultaneously
  • Method for detecting multiple heavy metal elements simultaneously

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Embodiment Construction

[0017] figure 1 Shown is the measurement system diagram based on the combination of ion selective electrode and stripping voltammetry. Four kinds of chalcogenide glass ion selective electrodes are used, and the reference electrode, working electrode and counter electrode are used as the measuring devices for stripping voltammetry. , the latter part is signal measurement, calculation, control and communication, including open circuit voltage measurement, constant potentiometer, instrument control, USB controller, and PC to process the back-end data.

[0018] Chalcogenide glass ion selective electrode is an ion-selective sensitive electrode. When the solution contains the ion, the open circuit voltage of the electrode is proportional to the concentration of the ion. As long as the corresponding response voltage is measured, the corresponding concentration value can be obtained according to the standard curve. figure 2 The standard curve of the selected electrode is Fe chalcoge...

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Abstract

The method of detecting multiple heavy metal elements simultaneously is one combined ion selecting electrode and leaching voltage-current method. In the detecting system, the electrode combination of several selecting electrodes, reference electrodes and working electrodes is adopted. For practical solution with several kinds of heavy metal elements in wide dynamic content range, the selecting ion electrodes are first used to detect heavy metals in high content, and leaching voltage-current method is then adopted. The present invention has simple sample processing program, is suitable for automatic measurement, and may be used in various fields.

Description

Technical field [0001] The invention relates to a method for simultaneous detection of multiple heavy metal elements. Background technique [0002] Heavy metal ions (such as Zn 2+ , Pb 2+ 、Cd 2+ 、Cu 2+ 、Cr 6+ , Mn 5+ 、As 3+ , Fe 3+ , Hg 2+ ) can have harmful or even fatal effects on the human body, so the quantitative detection of heavy metals is of great significance in medicine, food, clinical and environmental monitoring. Because the dynamic range of the heavy metal content contained in the solution sample collected in different fields is very wide, even in the same field, the dynamic range of the heavy metal content contained in the solution sampled at different times and different places is also inconsistent, which gives the actual The detection technology has brought great difficulties. At present, the dynamic range of many methods and instruments for detecting heavy metals is relatively small. If the heavy metal content is too high, the sample needs to be dil...

Claims

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Application Information

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IPC IPC(8): G01N27/411
Inventor 王平门洪刘大龙方昉韩清鹏邹绍芳
Owner ZHEJIANG UNIV
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