title: Erbium determination in preforms of optical fibres by inductively coupled plasma-atomic emission spectrometry.
abstract: Erbium which is used in the composition of heavy metal fluoride optical fibres was determined in preforms of these materials by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The new analytical procedure developed comprises: solid sample dissolution, via an alkaline fusion with sodium carbonate, and acid leaching with dilute hydrochloric acid, and measurements of emission intensities of 337.276 nm. This method has a detection limit of 31 ng/ml and a reproducibility of 0.90% r.s.d.
authors.affiliation: Department of Analytical Chemistry, Science Faculty, University of Zaragoza, 50009 Zaragoza, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Lopez-Molinero
authors.forename: A
authors.initials: A
authors.lastname: Villareal
authors.forename: J
authors.initials: J
authors.lastname: Anzano