Volatilization of arsenic as the trichloride for sample introduction in atomic spectroscopy
A method for volatilization of arsenic for facile and interference-free introduction of the element into a flame atomic spectrometer is presented. The generation is based on conversion of trivalent arsenic in solution into low-boiling arsenic trichloride by strong hydrochloric acid. The AsCl/sub 3/ gas is produced in a flow system and separated from the liquid sample stream by a permeable tube, whose outer side is purged with hydrogen gas. Subsequent detection of As(III) is achieved by using an oxygen-hydrogen flame-in-tube atomizer and atomic absorption spectrometry. The tolerance toward the interferents cobalt, copper, nickel, and iron is improved considerably, when compared with hydride generation methods using sodium tetrahydroborate(III) as reagent.
- Research Organization:
- Univ. of Umea (Sweden)
- OSTI ID:
- 6885164
- Journal Information:
- Anal. Chem.; (United States), Vol. 60:19
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ARSENIC
ABSORPTION SPECTROSCOPY
ARSENIC CHLORIDES
EVAPORATION
EXPERIMENTAL DATA
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLE PREPARATION
ARSENIC COMPOUNDS
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
DATA
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
PHASE TRANSFORMATIONS
SEMIMETALS
SPECTROSCOPY
400102* - Chemical & Spectral Procedures