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Nucleophilic attack by bromide ions as a first step of conversion of Se VI to Se IV    
Yazarlar (3)
Prof. Dr. Neslihan ÖZBEK Prof. Dr. Neslihan ÖZBEK
Kırşehir Ahi Evran Üniversitesi, Türkiye
Somer Güler
Zuman Peter
Devamını Göster
Özet
Numerous commonly used analytical methods allow only determination of a total amount of selenium in a given sample. Electroanalytical methods as well as those based on hydride generation or on formation of piazselenol allow only determination of Se(IV). To determine Se(VI) by these procedures, present alone or in mixtures with Se(IV), it is first necessary to convert Se(VI) to Se(IV). Such conversion is effective in the presence of excess of halides in acidic media or by photoreduction. In the often used conversion of Se(VI) in the presence of chlorides or less frequently of that of bromides, it has been assumed that the halide ion acts as a reducing agent. Kinetic studies of conversion of Se(VI) in acidic solutions containing an excess of bromide ions indicated that the rate determining first step of the reaction with Se(VI) is a nucleophilic substitution of the OH2+ group in the protonated form of H2SeO4 by bromide ions …
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Talanta
Dergi ISSN 0039-9140 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 03-2006
Cilt No 69
Sayı 1
Sayfalar 25 / 31
Doi Numarası 10.1016/j.talanta.2005.06.073
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0039914005005801
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
Google Scholar 3
Nucleophilic attack by bromide ions as a first step of conversion of Se VI to Se IV

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