Validation of the sulphur concentration of selected iron-base NBS standard reference materials by isotope-dilution spark-source mass-spectrometry.
An isotope-dilution spark-source mass-spectrometric procedure has been developed for the accurate determination of sulphur in iron-base alloys. Dissolution in a sealed tube is used to prevent volatilization losses and to effect isotope equilibration. Application of this technique to the re-analysis of existing NBS Standard Reference Materials yields results that are generally in good agreement with the certified values.
Burke
R W
RW
National Bureau of Standards, National Measurement Laboratory, Center for Analytical Chemistry, Washington, DC 20234, U.S.A.
Paulsen
P J
PJ
Maienthal
E J
EJ
Lambert
G M
GM