Zobrazeno 1 - 10
of 10
pro vyhledávání: '"H.Kipton J. Powell"'
Publikováno v:
Inorganica Chimica Acta. 355:25-32
Reactions of ethane-1,2-diamine compounds of nickel(II) with acetone can yield a variety of products, depending upon conditions. Reaction of [Ni(en) 2 ](ClO 4 ) 2 with acetone forms [Ni(amket) 2 ](ClO 4 ) 2 , which has nickel(II) in octahedral mer -c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6b23b1d4d2e4007565b4b393135bd03
https://doi.org/10.1016/s0020-1693(03)00237-8
https://doi.org/10.1016/s0020-1693(03)00237-8
Autor:
H.Kipton J. Powell, Eric Fenton
Publikováno v:
Analytica Chimica Acta. 334:27-38
Humic substances have been extracted from a standard reference peat at pH 2.0, 6.0–6.5, 9.0 and 12.0 using 0.01 M or 0.001 M Na4P2O7. Humic acids extracted at pH 6.0, 9.0 and 12.0 showed a progressive increase in mean molecular size, as determined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d89d67b109127d4146fc1b804a371912
https://doi.org/10.1016/s0003-2670(96)00324-8
https://doi.org/10.1016/s0003-2670(96)00324-8
Publikováno v:
Analytica Chimica Acta. 319:305-314
Equilibria in the Al 3+ H + -eriochrome cyanine R (ECR) system were studied by potentiometry and spectrophotometry in 0.10 M KC1 at 25 °C and p[H + ]2.5–6.5. Potentiometric titration data were interpreted in terms of a monomeric 1:1 complex Al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f4349f863b6e28f74fc16a567791573
https://doi.org/10.1016/0003-2670(95)00497-1
https://doi.org/10.1016/0003-2670(95)00497-1
Autor:
H.Kipton J. Powell, Raewyn M. Town
Publikováno v:
Analytica Chimica Acta. 279:221-233
Ion-selective electrode potentiometry was used to probe the Cu(II) complexation capacity of soil-derived humic acids (HAs) and fulvic acids (FAs) at pH 5.0, 6.3, and 7.0. The relative stabilities of these complexes at pH 2.5–7.5 were determined. Fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e305eb78ec66df350869e4f3a598312
https://doi.org/10.1016/0003-2670(93)80321-b
https://doi.org/10.1016/0003-2670(93)80321-b
Autor:
Raewyn M. Town, H.Kipton J. Powell
Publikováno v:
Analytica Chimica Acta. 271:195-202
XAD resins are widely used to isolate aquatic humic substances. In this work the molecular adsorption and subsequent desorption of a soil humic acid on XAD-2, 4, −7 and −8 was studied. Gel permeation chromatography established that size-exclusion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6091e82c69399cb7977071cd19de5ee1
https://doi.org/10.1016/0003-2670(93)80045-m
https://doi.org/10.1016/0003-2670(93)80045-m
Publikováno v:
Analytica Chimica Acta. 269:41-48
Magnesium was determined in a flow-injection system by formation of the magnesium-Eriochrome Black T (EBT) complex at pH 11.5 (5% 1,2-diaminoethane in 0.1 M KCl) and amperometric measurement of the excess of EBT at +0.175 V on a glassy carbon electro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c7dd24c8e5800569419d4346f550d44
https://doi.org/10.1016/0003-2670(92)85131-o
https://doi.org/10.1016/0003-2670(92)85131-o
Publikováno v:
Analytica Chimica Acta. 256:117-123
Aluminium was determined in a flow-injection system involving the formation of the aluminium(III)-1,2-dihydroxyanthraquinone-3-sulphonic acid (DASA) complex at pH 9.0 and amperometric measurement of excess of DASA at +0.50 V on a gold electrode. Elec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::615bc12a2b52281e9e8155a049c02048
https://doi.org/10.1016/0003-2670(92)85336-5
https://doi.org/10.1016/0003-2670(92)85336-5
Autor:
Raewyn M. Town, H.Kipton J. Powell
Publikováno v:
Analytica Chimica Acta. 248:95-102
The interaction of humic substances [humic acid (HA) and fulvic acid (FA)] with stable hydrophobic copper(II) complexes Cu(PAN)2 and Cu(oxine)2 has been studied at pH 8.2 by DC-anodic stripping voltammetric measurements at a Nafion-coated thin mercur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47b46678a366e14c131ae94d78601b15
https://doi.org/10.1016/s0003-2670(00)80873-9
https://doi.org/10.1016/s0003-2670(00)80873-9
Publikováno v:
Talanta. 40:1829-1831
Electrodeposition of Pb from 50 μl volumes of 0.1M KCl solution was studied by electrolysis at uncontrolled potentials of 4.0–6.0 V on a pyrolytic graphite platform cathode. Deposition efficiency was evaluated as a function of time by ASV measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::462b76360d086f20a682baf0b264b7c8
https://doi.org/10.1016/0039-9140(93)80103-x
https://doi.org/10.1016/0039-9140(93)80103-x
Autor:
Jan E. Gregor, H.Kipton J. Powell
Publikováno v:
Analytica Chimica Acta. 211:141-154
The use of anodic stripping voltammetry (ASV) to determine the labile metal fraction in metal/ fulvic acid equilibrium systems is discussed. A method is described for distinguishing between the contributions of processes in the reduction and oxidatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28a32c9f83e803486b3496fa3e109877
https://doi.org/10.1016/s0003-2670(00)83676-4
https://doi.org/10.1016/s0003-2670(00)83676-4