ALI AMRON, 080942007 (2011) ELEKTRODA SELEKTIF ION La3+ TIPE KAWAT TERLAPIS DENGAN IONOFOR SENYAWA KARBOKSIMETOKSI TERSIERBUTILKALIKS[6]ARENA. Thesis thesis, UNIVERSITAS AIRLANGGA.

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Abstract

Has been investigated lanthanum ion selective electrode with ionophores carboxymethoxy tertierbutil Calix [6] arene compound. Electrodes made with coated wire type . Wire electrode was made of silver metal is coated membrane containing the active ingredient compound ionophores Calix [6] arenas, anionicside KTCPB, plasticizer NPOE and PVC supporting matrix material. The results showed that the electrode potential measurements using a comparison electrode Ag / AgCl obtained optimal conditions for measurements of the atmosphere of pH 4-7. Characteristics of ESI-La3 + indicated a price of 19.67 Nernst factor, the measurement range of 10-6-10-1 M, the precision with coefficient of variation of 1.12% - 10.14%, detection limit of 7.41 x 10-7M and accuracy for the concentration 10-6, 10-3 and 10-1 respectively of 106%, 89% and 120%. Selectivity increased levels of rare earth ion (Ce3+) , transitions ions (Pb2+, Cu2+), alkaline earth ions (Mg2+, Ca2+) and alkali ions (Na+, K+).

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