Polarographic determination of V(IV)/V(V) ratio in vanadate glasses

• Autorzy: El-Askalany A. H. , Khalifa M. E. , Nawar N. , El-Defrawy M. M.

Warianty tytułu

PL

Polarograficzne oznaczanie stosunku V(IV)/V(V) w szkłach wanadowych

• Języki publikacji: EN

Abstrakty

EN

Polarographic reduction of vanadate and vanadyl ions in the presence of 0.4 mol 1(-1) Na(2)SO(4), 0.016 mol 1(-1) H(2)SO(4) and 8 x 10(-1) mol 1(-1 ) ethylenediaminetetraacetic acid disodium salt (EDTA) has been investigated by direct current (DC) and direct current tast (DCT) polarographic techniques. Two waves were obtained. The first wave corresponds to the reduction of V(V) to V(IV) and the second wave is due to the reduction of V(IV) to V(III). The constancy of Id/C makes the microdetermination of both V(IV) and V(V) possible. The effects of different anions and cations on DC and DCt polarographic waves were studied. A proposed procedure has been elaborated and applied successfully for the determination of V(IV)/V(V) ratio in vanadate glasses.

PL

Badano polarograficzną redukcję wanadu w obecności 0.4 mol 1(-1) Na(2)SO(4) i 8 x 10(-3) mol 1(-1) Na2EDTA. Otrzymano dwie fale odpowiadające redukcji V(V) do V(IV) i V(IV) do V(III). Zbadano także wpływ różnych anionów i kationów na wysokość fal wanadu. Zaproponowano procedurę oznaczenia V(V) i V(IV) w szkłach wanadowych.

Słowa kluczowe

EN

electrochemistry; polarography; determination; vanadate glass; vanadium

PL

elektrochemia; polarografia; oznaczanie; szkło wanadowe; wanad

• Wydawca: Komitet Chemii Analitycznej PAN
• Czasopismo: Chemia Analityczna
• Rocznik: 2000
• Tom: Vol. 45, No. 1
• Strony: 117--124
• Opis fizyczny: Bibliogr. 18 poz.

Twórcy

autor

El-Askalany A. H.

• Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, P. O. Box 79, Egypt

autor

Khalifa M. E.

• Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, P. O. Box 79, Egypt

autor

Nawar N.

• Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, P. O. Box 79, Egypt

autor

El-Defrawy M. M.

• Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, P. O. Box 79, Egypt

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