title: Instrumental modification intended to save time, and volumes of sample and reagent solutions, in the atomic fluorescence spectrometric determination of mercury.
abstract: Use of small membrane pumps, instead of peristaltic pumps, to introduce sample and reagent solutions into the spectrometer has several advantages in atomic fluorescence spectrometric determination of mercury. This simple modification results in a substantial saving in the time required for the measurements and so 90% of reagent solution volumes and 95% of sample solution volumes are saved, with a consequent decrease in the volume of waste generated. The sampling frequency is almost tripled, with no deterioration in sensitivity, which is similar to that obtained by use of peristaltic pumps. The relative standard deviation for ten consecutive measurements of a 1 microg L-1 mercury solution was approximately 2%.
authors.affiliation: Department of Agricultural Chemistry, Geology and Pedology, Faculty of Chemistry, University of Murcia, 30071, Murcia, Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Pérez-Sirvent
authors.forename: María J
authors.initials: MJ
authors.lastname: Martínez-Sánchez
authors.forename: Mariluz
authors.initials: M
authors.lastname: García-Lorenzo
authors.forename: Ignacio
authors.initials: I
authors.lastname: López-García
authors.forename: Manuel
authors.initials: M
authors.lastname: Hernández-Córdoba