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
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[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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