Synthesis and Characterization of 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (HPMBP) and its application as Ionophore in Neodymium (III) Selective Membrane Electrodes
Husain Sosidi, Indra Noviandri, Buchari Buchari

Abstract
It has been successfully synthesized and characterized of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) to be used as ionophore in neodymium(III) selective membrane electrode. This electrode has been used as indicator electrode for determination of Nd(III) potentiometrically. The performance of the electrode has been investigated in 10-6 to 10-2M of Nd3+ standard solution at pH 4 and ionic strength adjusted by 10-2M of KCl. Sensitivity and limit detection of the electrode is 39.91±1.33mV/decade and 1.02x10-4M of Nd3+respectivelly. The respon time of the electrode is 22 second and its life time is 3 week. The electrode has been tested for determination of Nd3+ concentration in real sample solution of Bangka monasit sand prepared by Centre Research of Mineral and Coal Mine-Bandung. The result has a good agreement with the Nd3+ concentration determined by ICP-OES.

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