Record Display for the EPA National Library Catalog
RECORD NUMBER: 30 OF 94| Main Title | Direct Determination of Chelons at Trace Levels by One-Drop Square-Wave Polarography. | |||||||||||
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| 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) | |||||||||||
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| Collation | 9p | |||||||||||
| Abstract | 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.) |