Determination of cadmium in Lake Michigan by mass spectrometric isotope dilution analysis or atomic absorption spectrometry following electrodeposition

Conference · Mon Mar 01 04:00:00 EST 1982 · Anal. Chem.; (United States)

OSTI ID:5213318

Muhlbaler, J; Stevens, C; Graczyk, D; Tisue, T

Electrodeposition on an amalgamated gold wire concentrates cadmium effectively from freshwater for subsequent determination by mass spectrometric isotope dilution analysis or by electrothermal atomic absorption spectrometry. Sampling and handling procedures have been developed that reduce blanks to approx. 3 ng L/sup -1/ while avoiding the need for clean room operations. By use of mass spectrometric isotope dilution, the calculated instrumental limit of detection was <0.1 ng, well below the limits imposed by the observed precision and blank values. The overall procedure, including determination of and correction for the blank value, had a precision of 14%, relative standard deviation. Electrothermal atomic absorption spectrometric detection gave a relative precision of 19%. The mean cadmium concentration in Lake Michigan water samples from 1978 ranged from 31 to 41 ng L/sup -1/.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 5213318
• Conference Information: Journal Name: Anal. Chem.; (United States) Journal Volume: 54:3
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical &amp; Spectral Procedures
520200* -- Environment
Aquatic-- Chemicals Monitoring &amp; Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
BUILDUP
CADMIUM
CHEMICAL ANALYSIS
COMPARATIVE EVALUATIONS
DEPOSITION
ECOLOGICAL CONCENTRATION
ELEMENTS
FRESH WATER
GREAT LAKES
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
ISOTOPE DILUTION
LAKE MICHIGAN
LAKES
MASS SPECTROSCOPY
MEASURING METHODS
METALS
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
SAMPLING
SPECTROSCOPY
SURFACE WATERS
TRACER TECHNIQUES
WATER