title: Automated total and radioactive strontium separation and preconcentration in samples of environmental interest exploiting a lab-on-valve system.
abstract: A novel lab-on-valve system has been developed for strontium determination in environmental samples. Miniaturized lab-on-valve system potentially offers facilities to allow any kind of chemical and physical processes, including fluidic and microcarrier bead control, homogenous reaction and liquid-solid interaction. A rapid, inexpensive and fully automated method for the separation and preconcentration of total and radioactive strontium, using a solid phase extraction material (Sr-Resin), has been developed. Total strontium concentrations are determined by ICP-OES and (90)Sr activities by a low background proportional counter. The method has been successfully applied to different water samples of environmental interest. The proposed system offers minimization of sample handling, drastic reduction of reagent volume, improvement of the reproducibility and sample throughput and attains a significant decrease of both time and cost per analysis. The LLD of the total Sr reached is 1.8ng and the minimum detectable activity for (90)Sr is 0.008Bq. The repeatability of the separation procedure is 1.2% (n=10).
authors: Renewable Energy and Environmental Protection Department, Advanced Materials Research Center (CIMAV) S.C., Miguel de Cervantes 120, Chihuahua, Chih. 31109, Mexico.
authors: Rogelio
authors: R
authors: Rodríguez
authors: Jessica
authors: J
authors: Avivar
authors: Laura
authors: L
authors: Ferrer
authors: Luz O
authors: LO
authors: Leal
authors: Victor
authors: V
authors: Cerdà