Major and minor oxide and trace element determination in silicate rocks by direct current plasma optical emission echelle spectrometry
A technique for the determination of major concentrations of SiO/sub 2/, Al/sub 2/O/sub 3/, Fe/sub 2/O/sub 3/, MgO, CaO, Na/sub 2/O, and K/sub 2/O, minor levels of TiO/sub 2/, P/sub 2/O/sub 5/, and MnO, and trace concentrations of Ba, Cr, Cu, Ni, Sr, V, and Zn, in semi-microsamples 200 mg) of powdered whole rock, is described. Chemically diverse standard reference rocks are used both for calibration and assessment of accuracy. A lithium metaborate fusion melt of each standard or sample is dissolved in dilute HNO/sub 3/ containing Cs/sup +/ at a level of 0.2% (w/v). The resulting solution is used to perform all analyses except those for Na/sub 2/O and K/sub 2/O, which are determined in a portion of the original sample solution wherein the Cs/sup +/ concentration has been raised to 0.32% (w/v). Analyses of both portions of each sample solution are performed using an optical emission spectrometer/spectrograph equipped with an echelle monochromator and a dc argon plasma excitation source. Trace element detection limits ranged from 2 ppM for Cu to 15 ppM for Zn. A study of precision based on replicate determinations in three splits of the proposed USGS reference basalt BHVO-1 yielded the following results: (1) For analyses of the major and minor oxide constituents, values of the percent relative standard deviation (RSD) ranged from 1 for CaO, to 21 for P/sub 2/O/sub 5/. 2) For trace element determinations, values of the RSD ranged from 2 for Cu, to 19 for Zn. 2 figures, 11 tables.
- Research Organization:
- Woods Hole Oceanographic Inst., MA
- OSTI ID:
- 6195765
- Journal Information:
- Anal. Chem.; (United States), Vol. 51:8
- Country of Publication:
- United States
- Language:
- English
Similar Records
Geochemical Variations in Four Residual Soils
Determination of barium in seawater by a standard addition method adapted to the direct current echelle optical emission spectrometer
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
EMISSION SPECTROSCOPY
BARIUM
CALCIUM OXIDES
CHROMIUM
COPPER
IRON OXIDES
MAGNESIUM OXIDES
MANGANESE OXIDES
NICKEL
PHOSPHORUS OXIDES
POTASSIUM OXIDES
ROCKS
QUALITATIVE CHEMICAL ANALYSIS
SILICON OXIDES
SODIUM OXIDES
STRONTIUM
TITANIUM OXIDES
VANADIUM
ZINC
CESIUM IONS
DIRECT CURRENT
ELEMENTS
NITRIC ACID
OPTICAL SPECTROMETERS
PLASMA
SILICATES
TRACE AMOUNTS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ATOMIC IONS
CALCIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CURRENTS
ELECTRIC CURRENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONS
IRON COMPOUNDS
MAGNESIUM COMPOUNDS
MANGANESE COMPOUNDS
MEASURING INSTRUMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
POTASSIUM COMPOUNDS
SILICON COMPOUNDS
SODIUM COMPOUNDS
SPECTROMETERS
SPECTROSCOPY
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
400104* - Spectral Procedures- (-1987)