The use of ion chromatography-D. C. plasma atomic emission spectrometry for the speciation of trace metals: Annual performance report, August 1, 1986--August 1, 1988

Technical Report · Mon Aug 01 04:00:00 EDT 1988

OSTI ID:6978150

Urasa, I T

An Ion Chromatograph (IC) was used in combination with a DC. Plasma Atomic Emission Spectrometer (DCPAES) to study the chemistry of and to speciate seven metals in aqueous solutions. The element selective nature of DCPAES allowed the direct detection of all forms of a targeted element with equal efficiency. The aqueous chemistry of metals such as Cr, Mn, Pt, and V was quite different from theoretical expectations, and was greatly influenced by the acidity of the solution. In some cases, a transformation occurred as acidity changed. In others, eg. with Pt, more than one charged moieties were formed in aqueous solution. With IC-DCPAES, these transformations and the appearance of different moieties can be monitored and quantitated. The approach was applied in trace metal analysis of natural water and waste water samples. The measurable concentrations of the metal ions studied were in the low ppM range. Detection of ppB concentrations is desired. The measures employed to improve measurement sensitivity assumed the availability of a large sample volume. A scheme for interfacing the IC to the DCPAES to ensure the introduction of 90--100% of the chromatographic effluent into the DCPAES and hence facilitating the detection of ppB concentrations is needed. 14 figs., 2 tabs.

• Research Organization: Hampton Univ., VA (USA). Dept. of Chemistry
• DOE Contract Number: FG05-86ER13589
• OSTI ID: 6978150
• Report Number(s): DOE/ER/13589-2; ON: DE88014728
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ARSENIC
CHROMATOGRAPHY
CHROMIUM
CURRENTS
DIRECT CURRENT
DOCUMENT TYPES
ELECTRIC CURRENTS
ELEMENTS
EMISSION SPECTROSCOPY
ION EXCHANGE CHROMATOGRAPHY
IRON
MANGANESE
METALS
PLASMA
PLATINUM
PLATINUM METALS
PROGRESS REPORT
SEMIMETALS
SEPARATION PROCESSES
SPECTROSCOPY
TRACE AMOUNTS
TRANSITION ELEMENTS
USES
VALENCE
VANADIUM