A THEORETICAL STUDY OF THE USE OF INTERNAL STANDARDS FOR PRECISE ISOTOPIC ANALYSIS BY THE SURFACE IONIZATION TECHNIQUE: PART I. GENERAL FIRST-ORDER ALGEBRAIC SOLUTIONS

Journal Article · Sat Jun 01 04:00:00 EDT 1963 · J. Sci. Instr.

DOI:https://doi.org/10.1088/0950-7671/40/6/307· OSTI ID:4661063

Dodson, M H

Mass discrimination is a variable and unpredictable source of systematic error in mass spectrometric analysis using surface ionization techniques. A method of eliminating it through an internal standard technique is investigated. To simplify the algebra, a method of describing mass discrimination was developed which is symmetrical with respect to all isotopes in a sample. A set of equations for mixtures of samples with different isotopic compositions is set up and solved for elements with three or four isotopes, four isotopes giving the simpiest solutions. The solutions can be applied to quantitative analysis by the isotopic dilution technique, to the measurement of absolute isotopic abundances and to the measurement of relative abundances of samples of polyisotopic elements which have undergone isotopic fractionation. To make the most of these proposals the precision of measurement of ion current ratios from thermal ionization sources must be improved. (auth)

• Research Organization: University Museum, Oxford
• NSA Number: NSA-17-027279
• OSTI ID: 4661063
• Journal Information: J. Sci. Instr., Journal Name: J. Sci. Instr. Vol. Vol: 40
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
EQUATIONS
IONIZATION
ISOTOPE DILUTION
ISOTOPES
MASS SPECTROMETERS
MIXING
QUALITATIVE ANALYSIS
SOLUTIONS
STANDARDS
SURFACES