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Alireza Nezamzadeh-Ejhieh,Mehri Shahanshahi 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
Clinoptilolite was pretreated by mechanical ball-milling method to obtain nano particles and it was modified by hexadecylpyridynium bromide (HDPBr) surfactant to prepare a surfactant modified zeolite (SMZ) as an effective anion exchanger. The obtained SMZ was used as the active ingredient of a PVC membrane electrode which showed the best Nernstian response toward dichromate in the used conditions. The proposed electrode showed linear response in the concentration range of 1.0 x 10-5 to 5.0 x 10-2 mol L-1 dichromate with a detection limit of 5.0 x 10-6 mol L-1 at pH = 3–6 and a Nernstian slope of 29.9 ± 0.9 mV per decade of dichromate concentration.