Record Display for the EPA National Library Catalog

RECORD NUMBER: 17 OF 20

Main Title Molecular Spectral Interference in the Determination of Arsenic by Furnace Atomic Absorption.
Author Poldoski., J. E. ;
CORP Author Environmental Research Lab.-Duluth, Minn.
Year Published 1977
Report Number EPA/600/J-77/035;
Stock Number PB-269 929
Additional Subjects Arsenic ; Water analysis ; Atomic spectra ; Concentration(Composition) ; Surface waters ; Chemical analysis ; Absorption spectra ; Particles ; Error analysis ; Water pollution ; Sampling ; Reprints ; Water pollution sampling
Holdings
Library Call Number Additional Info Location Last
Modified		 Checkout
Status
NTIS  PB-269 929 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 5p
Abstract
A molecular spectral interference associated with a certain type of suspended particulate matter in natural waters is reported for the furnace atomic absorption determination of arsenic. In some water samples, arsenic concentrations were erroneously high by more than a factor of five above the actual concentration. Results of analyses were confirmed by an alternate analytical method. The degree of interference is a function of spectral bandpass and the concentration of hydrofluoric acid added to the sample. Use of 0.2-nm bandpass or 1% hydrofluoric acid markedly reduced the interference for the natural water samples investigated.