All solid-state contact lead(II) ion-selective PVC membrane electrode using dimethylene bis(4-methylpiperidinedithiocarbamate) neutral ionophore

All solid-state contact PVC membrane electrodes for lead(II) ion were devel oped by using dimethylene bis(4-methylpiperidinedithiocarbamate) as neutral carrier and nitrophenyloctyl ether or dioctylsebacate as plasticizers. Res ponse properties of the all solid-state contact PVC membrane electrode prep ared with nitrophenyloctyl ether were better than those of the membrane ele ctrode prepared with dioctylsebacate. The nitrophenyloctyl ether plasticize d the all solid-state contact PVC membrane electrode and exhibited a good l inear response of 30 mV/decade for lead(II) ion within the concentration ra nges 0.1 - 5 x 10(-6) mol dm(-3) lead(II) nitrate, good selectivity over al kali, alkali-earth and transition metal ions including copper(II) ion by a factor of at least 10(3), 10(4) and 10(2) respectively, and a short respons e time. The useful pH range was between 2.0 and 6.0.