Detection of ultratrace levels of uranium in aqueous samples by laser-induced fluorescence spectrometry

Journal Article · Mon Jun 01 00:00:00 EDT 1981 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00230a029· OSTI ID:6418722

Perry, D L ^[1]; Klainer, S M; Bowman, H R; Milanovich, F P; Hirschfeld, T; Miller, S

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1. Univ. of California, Berkeley

A new method of analysis for ultratrace quantities of ururanium in aqueous samples has been developed with a detection limit of 4 x 10/sup -14/M(10/sup -5/ ppb, 0.01 pg/mL). This detection level is considerably less than the average concentration of 0.1 ppb uranium found in natural groundwaters. The procedure consists of an initial coprecipitation of the solution uranium with calcium fluoride, calcination at 800/sup 0/C, and monitoring the uranium content by laser-induced fluorescence excitation (LIFE). Analytical data using this technique are presented for previously analyzed groundwater samples containing 10/sup -6/-10/sup -7/M uranium. The fluorescence yield dependence on calcination time and temperature and on cation and anion interferences is discussed.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6418722
• Journal Information: Anal. Chem.; (United States), Vol. 53:7
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM FLUORIDES
CALCINATION
COPRECIPITATION
URANIUM
FLUORESCENCE SPECTROSCOPY
LASER SPECTROSCOPY
WATER
CHEMICAL ANALYSIS
GROUND WATER
MICROANALYSIS
QUANTITATIVE CHEMICAL ANALYSIS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
VERY HIGH TEMPERATURE
ACTINIDES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
EMISSION SPECTROSCOPY
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
METALS
OXYGEN COMPOUNDS
PRECIPITATION
PYROLYSIS
SEPARATION PROCESSES
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
400104* - Spectral Procedures- (-1987)