The use of ion chromatography-dc plasma atomic emission spectrometry for the speciation of trace metals
The original objects of this research program were: to interface d.c. plasma atomic emission spectrometer with an ion chromatograph; to characterize and optimize the combined systems for application in the speciation of metals in aqueous solutions; to use this system in the study of the solution chemistry of various metals; and to find ways in which the measurement sensitivity of the method can be enhanced, thereby allowing the detection of metal species at low ppb concentration levels. This approach has been used to study the chemistry of and speciate several elements in solution including: arsenic, chromium, iron, manganese, nickel phosphorus, platinum, selenium, and vanadium. During the course of this research, we have found that the solution chemistry of the elements studied and the speciation data obtained can vary considerably depending on the solution, and the chromatographic conditions employed. The speciation of chromium, iron, and vanadium was found to be highly influenced by the acidity of the sample. The element selective nature of the d.c. plasma detector allows these changes to be monitored, thereby providing quantitative information on the new moieties formed. New approaches are being developed including the use of chelating ligands as preconcentration agents for purposes of reducing further the detection limits of the elements of interest and to improve the overall element speciation scheme. New thrusts are being directed towards the employment of post-column derivatization method coupled with colorimetric measurements to detect and quantify metal species eluting from the chromatographic column. The influence of sample acidity on these investigations will be carefully evaluated. These new thrusts are described in the accompanying Project Renewal Proposal.
- Research Organization:
- Hampton Univ., VA (United States). Dept. of Chemistry
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-86ER13589
- OSTI ID:
- 5637324
- Report Number(s):
- DOE/ER/13589-4; ON: DE92010317
- Country of Publication:
- United States
- Language:
- English
Similar Records
The use of ion chromatography-D.C. plasma atomic emission spectrometry for the speciation of trace metals. Final performance technical report, February 1, 1995--January 31, 1998
(The use of ion chromatography-dc plasma atomic emission spectrometry for the speciation of trace metals): Progress report
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
47 OTHER INSTRUMENTATION
METALS
ION EXCHANGE CHROMATOGRAPHY
AQUEOUS SOLUTIONS
CHELATING AGENTS
CHEMICAL ANALYSIS
CHROMIUM
ELECTRIC DISCHARGES
EMISSION SPECTROSCOPY
FRACTIONATION
PH VALUE
PLASMA
PROGRESS REPORT
SENSITIVITY
VANADIUM
CHROMATOGRAPHY
DISPERSIONS
DOCUMENT TYPES
ELEMENTS
MIXTURES
SEPARATION PROCESSES
SOLUTIONS
SPECTROSCOPY
TRANSITION ELEMENTS
400105* - Separation Procedures
440800 - Miscellaneous Instrumentation- (1990-)