Detection of gaseous organophosphorus compounds using secondary ion mass spectrometry

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00281a024· OSTI ID:5424109

Groenewold, G S; Todd, P J

Molecular secondary ion mass spectrometry (SIMS) has been investigated for sensitivity and selectivity in the analysis of gaseous organophosphorus compounds. Abundant analyte ions were observed when the gaseous organophosphorus compounds were admitted into the secondary ion source, where a matrix was under primary ion bombardment. The best matrix for the detection of dimethyl methylphosphonate (DMMP), trimethyl phosphate (TMP), and diisopropyl methylphosphonate (DIMP) was determined to be polyphosphoric acid. The abundance of secondary analyte ions was observed to be linear with the introduction rate of gaseous analyte. The introduction rate necessary to produce a 3:1 signal-to-noise ratio in the intensity of secondary protonated molecular ions from DMMP was estimated to be 4 x 10/sup -11/ mols/sup -1/. Substantially more analyte fragmentation is observed by using SIMS than by using methane chemical ionization mass spectrometry. Ten compounds representative of other compound classes were investigated in the same manner as the organic phosphonates; characteristic secondary protonated molecular ions were detected from amines only.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5424109
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:4; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMINES
CHEMICAL ANALYSIS
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
ION MICROPROBE ANALYSIS
MASS SPECTROSCOPY
MICROANALYSIS
NONDESTRUCTIVE ANALYSIS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PHOSPHORIC ACID
PHOSPHORUS
QUANTITATIVE CHEMICAL ANALYSIS
SPECTROSCOPY