Determination of the trace lead in water or air by the method for diffe rential electric potential dissolution
SHEN Jing-long
Abstract：The dissolution action,which is on the silve-mercury ele c trode while plating mercury,has been studied in this thesis.When pH is between 3 .0 and 6.0 in the CH3COONa-CH3COOH solution.The dissolution potential for th e lead is -0.445 voltage and a good shape of the dissolution peak curve can be f ormed.The method,which can analyse the trace lead in water or air with silver-m e rcury electrode by differential potential,has been established.The method gets r id of the trouble of plating mercury over and over again with glass-carbon elec tr ode.The experiment for the rate of recovery has been conducted in the four water samples.Its rate of recovery is all over 90% and the variation coefficient is l ess than 10%.So the method has the higher degree of preciseness and better accur acy.
Machine-generated Keywords：
Publication Date：2001-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 44-45，49 )