Abstract
An on-line anion-exchange pre-separation and preconcentration technique was coupled with microwave plasma torch (MPT) atomic emission spectrometry. Analytes in the sample solution formed anionic chloro-complexes in a hydrochloric acid medium. The anionic complexes in a higher acidity solution were preconcentrated on an anion-exchange resin and then eluted with a lower acidity solution. Aqueous samples were introduced into a low-powered Ar-MPT with a pneumatic nebulizer, and the solvent (water) was removed by a desolvation system. The effect of some experimental parameters on determination of Fe, Zn, Cd and Mo was examined and the operating conditions optimized. The detection limits for Fe, Zn, Cd and Mo were 6.5, 0.23, 2.9 and 7.2 ng ml–1, respectively. The enhancement factors are in the range 10–25 and the dynamic linear ranges are 4–5 orders of magnitude. The interferences caused by easily ionized elements and other concomitant ions tested were eliminated. Some real samples were analysed and the accuracy and precision (1.4–5.0%) obtained were satisfactory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.