caa a22 4500 378867563 CHVBK 20180305123401.0 cr unu---uuuuu 161128e20030401xx s 000 0 eng 10.1524/ract.91.4.233.19971 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.4.233.19971 Complexation of Ni(II) by α-isosaccharinic acid and gluconic acid from pH 7 to pH 13 [Elektronische Daten] [Peter Warwick, Nick Evans, Tony Hall, Sarah Vines] Nickel reactions with gluconic acid (Gl) and α-isosaccharinic acid (ISA) have been investigated from pH 7 to pH 13.3. Measurement of the stoichiometries of the products of these reactions showed that NiGl and NiISA were formed at pH<7, Ni2Gl(OH)3 and Ni2ISA(OH)3 were formed at pH values between 7 and 10 and Ni2Gl(OH)4 and Ni2ISA(OH)4 were formed at pH>10. The stability constants for the formation of the soluble complexes were measured using an ion exchange resin method (Schubert method) at pH 7 and 13.3, and differential pulse polarography at pH 7. The polarographic measurements were performed in order to check the validity of the Schubert method at pH 7. This was due to the possibility of any cationic complexes that may have been formed sorbing to the resin. The importance of determining the stoichiometry of the reactions before calculating the stability constants from measurements taken using the Schubert method is emphasised. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Warwick Peter aut Evans Nick aut Hall Tony aut Vines Sarah aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/4/2003(2003-04-01), 233-240 0033-8230 91:4/2003<233 2003 91 ract https://doi.org/10.1524/ract.91.4.233.19971 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.4.233.19971 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Warwick Peter aut NATIONALLICENCE 700 1- Evans Nick aut NATIONALLICENCE 700 1- Hall Tony aut NATIONALLICENCE 700 1- Vines Sarah aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/4/2003(2003-04-01), 233-240 0033-8230 91:4/2003<233 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter