XU QINGHUI, HUANG JIANGHUAI, LÜ RONGHUI, HUANG MINFEN. RESEARCH ON THE DETERMINATION OF Pb, Cd, Cu AND Zn IN SEAWATER BY STRIPPING VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (3): 369-375.
Citation:
XU QINGHUI, HUANG JIANGHUAI, LÜ RONGHUI, HUANG MINFEN. RESEARCH ON THE DETERMINATION OF Pb, Cd, Cu AND Zn IN SEAWATER BY STRIPPING VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (3): 369-375.
XU QINGHUI, HUANG JIANGHUAI, LÜ RONGHUI, HUANG MINFEN. RESEARCH ON THE DETERMINATION OF Pb, Cd, Cu AND Zn IN SEAWATER BY STRIPPING VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (3): 369-375.
Citation:
XU QINGHUI, HUANG JIANGHUAI, LÜ RONGHUI, HUANG MINFEN. RESEARCH ON THE DETERMINATION OF Pb, Cd, Cu AND Zn IN SEAWATER BY STRIPPING VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (3): 369-375.
In this paper, a comparison viral made between the two results of determining Pb, Cd, Cu and Zn in seawater by direct current (tripping voltammetry (DCS) with rotating glass carbon electrode and by differential pulse stripping voltammetry (DPS) with hanging mercury drop electrode (HMDE).By DCS, the range of linear calibration curves obtained was 4×10-3 M-2×10-7M for Cu, Zn and Cd, and 4×10-9M-2×10-3M for Pb.By using DPS, the range of linear calibration curve was as follows:Cu 0.65-1.9 ppb; Pb 1.0-10 ppb; Zn 0.65-2.0 ppb; Cd 0.02-0.14 ppb.It was found that DCS could be used for determining Pb, Cu, Zn in coastal waters, but it is necessary to add gallium ion to it to eliminate the interference of Cu-Zn inter-metallic compound for determining Zn.The DPS is better for determinig Cd.
DownLoad: