Zobrazeno 1 - 10
of 196
pro vyhledávání: '"Les Ebdon"'
Publikováno v:
Science of The Total Environment. 344:201-210
Several long-term sets of hourly nitrate concentration data were obtained through deployment of a nitrate sensor in an upper reach of the River Taw, a small moorland-fed river in the South West of the UK. Examination of the data obtained during perio
Publikováno v:
Analytica Chimica Acta. 510:175-182
Phosphate selective electrodes have been produced based upon rubbery membranes containing heterocylic macrocycles as sensors covalently bound to a cross-linked polystyrene-block–polybutadiene-block – polystyrene (SBS) polymer. The membranes were
Publikováno v:
Microchemical Journal. 76:161-171
A new on-line method for the separation of vanadium (IV) and vanadium (V) as well as for the removal of ClO+ mass spectral interference on vanadium determination by quadrupole-ICP-MS has been developed. The sample introduction system consists of a mo
Publikováno v:
Microchemical Journal. 76:35-41
Sector-field high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) has been used, at R=3000, to resolve spectral interferences caused by N2+ and CO+ on 28Si+, and NOH+ and NO+ on 31P+, thereby facilitating the speciation of these e
Publikováno v:
Journal of Analytical Atomic Spectrometry. 18:142-145
Ion stopping experiments have been performed using a triple grid placed between the ion extraction and collector lenses of a modified lens stack. Stopping voltages for ions extracted from the plasma were between 6.6 and 13.1 V (Be+), 9.8–13.1 V (Co
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 57:741-754
Methods for the determination of equilibrium dissociation temperature ( T diss ) have been compared. A modified Boltzmann plot for the dissociation equilibrium of M + –O species was deemed to be the most reliable, yielding T diss =7172 K when the r
Publikováno v:
International Journal of Environmental Analytical Chemistry. 82:835-841
A method is presented for arsenic speciation analysis of an oyster sample using ion chromatography coupled with an inductively coupled plasma mass spectrometry (ICP-MS) instrument. A strong anion exchange resin was employed with a step gradient eluti
Publikováno v:
The Analyst. 127:1108-1114
Two procedures have been investigated for the quantification of the different forms of mercury in food. A two-stage procedure has been developed to determine firstly total inorganic and organometallic species, and then the full separation of all orga
Publikováno v:
Journal of Environmental Monitoring. 3:37-42
Radiochemical partitioning experiments using 203Hg have been undertaken with mixtures of river, seawater and sediment samples taken from three geochemically contrasting UK estuaries: the Plym, Beaulieu and Mersey. Species of dissolved Hg were determi
Publikováno v:
Journal of Analytical Atomic Spectrometry. 16:1028-1034
Lead speciation using modified silica capillaries for the introduction of liquid samples to a direct injection nebulizer of an inductively coupled plasma quadrupole mass spectrometer is described and demonstrated. The fused silica capillaries were co