Page 16 of Ion Chromatography for power plants by Metrohm AG

measurement for measurements a 2000 l sample is preconcentrated the preconcentration volume depends on the expected concentrations and the matrix for measurements in the lower ppt range singledigit ppt more than 100 ml sample can be preconcentrated particular attention is given to the separation between fluoride and the rapidly eluting anions glycolate acetate and formate the metrosep a supp 7 ­ 250 column is used which separates these anions from the other standard anions in an isocratic run no 1 2 3 4 5 ­ 6 7 8 9 10 ion fluoride glycolate acetate formate chloride carbonate nitrite bromide nitrate phosphate sulfate concentration 20.21 3.36 9.67 3.10 25.51 ­ 10.73 0.20 22.32 17.79 69.65 column metrosep a supp 7 ­ 250 6.1006.630 eluent sodium carbonate eluent sample from the primary circuit of a nuclear power plant concentration ppb ­ g/l preconcentration volume 2000 l 16

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