You are here:
DIRECT DETERMINATION OF CHELONS AT TRACE LEVELS BY ONE-DROP SQUARE-WAVE POLAROGRAPHY
Citation:
Stojek, Z. AND J. Osteryoung. DIRECT DETERMINATION OF CHELONS AT TRACE LEVELS BY ONE-DROP SQUARE-WAVE POLAROGRAPHY. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-81/678.
Description:
The direct anodic oxidation of mercury in the presence of chelons can be used for determination of the chelons at trace levels. One-drop square-wave polarography proved superior to differential pulse polarography for this purpose and gave detection limits of 7, 7, 5, and 20 x 10 to the -8th power M for EDTA, DCTA, EGTA, and NTA, respectively, with calibration curves linear to 10 to the -5 power M. At pH 4.8 heavy metals can be determined in the presence Ca(+2) by using amperometric titration based on this method. (Copyright (c) 1981 by the American Chemical Society.)