Pulsed laser resonance ionization mass spectrometry for elementally selective detection of lead and bismuth mixtures

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00168a028· OSTI ID:6723972

Fearey, B L; Miller, C M; Rowe, M W; Anderson, J E; Nogar, N S

Pulsed laser, single-color, (2 + 1) multiphoton ionization is used to achieve elemental selectivity while concurrently eliminating isobaric interferences for lead (Pb) and bismuth (Bi) mixtures detected via resonance ionization mass spectrometry. Experimental results are compared with theoretical calculations by using a simple rate equation formalism. The following oscillator strengths were determined: Pb, 6p7p /sup 3/P/sub 0/ reverse arrow 6p7s /sup 3/P/sub 1//sup 0/, f = 0.4 +/- 0.1; Bi, 6p/sup 2/ (/sup 3/P/sub 0/) 7p J = /sup 3///sub 2//sup 0/ reverse arrow 6p/sup 2/7s /sup 4/P/sub 1/2/, f = 0.07 +/- 0.02. In addition, the Bi ionization cross section at 64,412 cm/sup -1/ was estimated to be (5 +/- 2) x 10/sup -18/ cm/sup 2/. Relative efficiencies of the ionization processes for these elements and a comparison between pulsed and continuous laser excitation are discussed.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6723972
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:17; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
BISMUTH
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
DATA
DISPERSIONS
DYE LASERS
EFFICIENCY
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
INFORMATION
IONIZATION
KINETICS
LASERS
LEAD
LIQUID LASERS
MASS SPECTROSCOPY
METALS
MIXTURES
MULTI-PHOTON PROCESSES
NUMERICAL DATA
PHOTOIONIZATION
PREDICTION EQUATIONS
PULSE TECHNIQUES
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
SPECTROSCOPY