Determination of barium in seawater by direct injection graphite furnace atomic absorption spectrometry

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00278a022· OSTI ID:5566246

Roe, K K; Froelich, P N

Barium is determined in aqueous solution by direct injection graphite furnace atomic absorption spectrometry. NH/sub 4/NO/sub 3/ modifier eliminates seawater NaCl in a slow 1400 /sup 0/C char step. Atomization is at 2700 /sup 0/C. Detection is at 553.6 nm, and calibration is by peak area. Sensitivity is 0.2 abs s/ng (abs = absorbance unit) and is independent of matrix salinity. Detection limits are 30 pg of Ba (600 ng L/sup -1/) for 50-..mu..L sample injections of seawater and 10 pg of Ba (200 ng L/sup -1/) for freshwaters. Precision is about +/-13%. There are no spectral interferences due to calcium or Ba halides. Results of the analyses of seawater agree well with values determined by isotope dilution.

• Research Organization: Florida State Univ., Tallahassee
• OSTI ID: 5566246
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:14; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
ALKALINE EARTH METALS
AQUEOUS SOLUTIONS
BARIUM
CARBON
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
DATA
DISPERSIONS
ELEMENTAL MINERALS
ELEMENTS
EXPERIMENTAL DATA
FRESH WATER
FURNACES
GRAPHITE
HYDROGEN COMPOUNDS
INFORMATION
METALS
MINERALS
MIXTURES
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SEAWATER
SOLUTIONS
SPECTROSCOPY
WATER