Automated two-column ion exchange system for determination of the speciation of trace metals in natural waters

摘要: A rapid method for determination of metal speciation based on an automated two-column ion exchange system is described. Two fractions dissolved trace species are directly determined by on-line flame atomic absorption spectrophotometry after preconcentration sequential columns Chelex-100 chelating resin and AG MP-1 macroporous anion resin. third fraction standard addition. Variables that affect the results obtained studied use model complexing agents. With a 10-mL sample loop, throughput 6 samples per hour detection limits 0.1 micrograms/L Cu(II), 0.08 Cd(II), 0.2 Zn(II). The used to determine Zn(II) in natural water samples.