Record Display for the EPA National Library Catalog


Main Title Direct Determination of Chelons at Trace Levels by One-Drop Square-Wave Polarography.
Author Stojek, Z. ; Osteryoung, J. ;
CORP Author State Univ. of New York at Buffalo. Dept. of Chemistry.;Environmental Research Lab., Athens, GA.
Year Published 1981
Report Number EPA-R-805183; EPA-600/J-81-678;
Stock Number PB84-142397
Additional Subjects Trace elements ; Polarographic analysis ; Chelating agents ; Complex compounds ; Mercury(Metals) ; Oxidation ; Volumetric analysis ; EDTA ; Chemical analysis ; Water pollution ; Nitrogen organic compounds ; Reprints ; Chelons ; Water pollution detection ; Heavy metals ; Acetic acid/nitrilo-tri ; Cyclohexane diamine tetraacetic acid ; Dioxadiazatetradecanedioic acid/bis(carboxymethyl)
Library Call Number Additional Info Location Last
NTIS  PB84-142397 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
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.)