A method for measuring the concentration of lead ions in PM2.5

A lead ion and concentration technology, which is applied in the field of electrochemical determination, can solve the problems of time-consuming, complex chemical reactions, and bulky volume, and achieve the effects of improving selectivity and sensitivity, facilitating storage, and improving instability

Active Publication Date: 2016-08-24
YANGZHOU UNIV
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Problems solved by technology

[0003] Currently, the commonly used Pb 2+ The detection methods include flame atomic absorption spectrometry, spectrophotometry, complexometric titration, fluorescence spectroscopy, etc. Although trace heavy metal ions can be detected well, these methods are usually time-consuming and accompanied by complicated chemical reactions, or Requires large quantities of reagents, analytes, and bulky and complex instrumentation

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  • A method for measuring the concentration of lead ions in PM2.5
  • A method for measuring the concentration of lead ions in PM2.5
  • A method for measuring the concentration of lead ions in PM2.5

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Embodiment Construction

[0017] The present invention measures the method for lead ion concentration in PM2.5, comprises the following steps successively:

[0018] ⑴Use Al on the polishing cloth 2 o 3 After polishing the glassy carbon electrode with powder, immerse it in a beaker filled with acetone and use an ultrasonic cleaner to ultrasonically clean it for 20 minutes. The diameter of the electrode jacket of the glassy carbon electrode is 6mm, the length of the electrode is 60mm, and the length of the copper terminal of the glassy carbon electrode is 20mm. ; Then place the glassy carbon electrode in ultrapure water and ultrasonically clean it for 5 minutes for primary cleaning, then ultrasonically clean it in 0.1mol / L dilute hydrochloric acid for 20 minutes, and then ultrasonically clean it in absolute ethanol for 5 minutes for secondary cleaning.

[0019] ⑵ Dry the above glassy carbon electrode with a hair dryer, and place it in a desiccator after the ethanol and acetone are completely volatilized...

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Abstract

The invention relates to a method for measuring the concentration of lead ions in PM2.5. The method comprises the following steps: dripping a modification liquid to the surface of a glassy carbon electrode, baking, inserting the glassy carbon electrode serving as a working electrode, an auxiliary electrode and a reference electrode into a mixed solution of glycine and sodium nitrate, and repeatedly scanning, so that the surface of the glassy carbon electrode is coated with a polyglycine-multiwalled carbon nanotube / naphthol / epoxy phosphate film; inserting a modified electrode serving as a working electrode into a base solution containing lead ions, giving a voltage-current curve summary chart by virtue of an electrochemical workstation, and reading the current peak of the concentration of each lead ion; and drawing a relational graph between the lead ion concentration and the current peak, obtaining a linear relation formula between the lead ion concentration and the current peak, igniting circular filter paper of a PM2.5 sample to be burnt into ash, dissolving the ash in an HNO3 base solution, inserting the modified electrode serving as a working electrode into a to-be-detected base solution, giving a voltage-current curve chart by virtue of the electrochemical workstation, reading the current peak of the lead ions, and calculating the lead ion concentration through a formula. The method is rapid, easy, convenient and accurate.

Description

technical field [0001] The invention relates to a method for measuring the concentration of lead ions in PM2.5, belonging to the technical field of electrochemical measurement. Background technique [0002] On January 4, 2014, the country included smog weather in the 2013 natural disaster notification for the first time. In haze weather, PM2.5 is the "culprit". PM2.5 mainly causes damage to the respiratory system and cardiovascular system, including respiratory irritation, coughing, dyspnea, reduced lung function, aggravation of asthma, chronic bronchitis, arrhythmia, non-fatal heart disease, heart and lung disease patients Serious diseases such as premature death. Lead ion is an important part of PM2.5. Lead is a heavy metal element that seriously endangers human health. Once it enters the body, it will accumulate in the human body. After reaching a certain concentration, it can affect nerves, hematopoiesis, digestion, urinary, reproductive and Developmental, cardiovascu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N27/38G01N27/30
Inventor 李可鑫金根娣胡效亚
Owner YANGZHOU UNIV
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