Growth and dominance of the cyanobacterium Anabaena circinalis in weir pools of the Barwon-Darlin... more Growth and dominance of the cyanobacterium Anabaena circinalis in weir pools of the Barwon-Darling River, Australia, are related to persistent vertical thermal stratification between October and March, when discharge is low. We determined critical velocities and discharges required to suppress bloom formation at three sites, and modelled the occurrence of sub-critical dis- charges in order to predict the frequency of
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 2015
Honey samples originating from Australia were purchased and analysed for targeted pyrrolizidine a... more Honey samples originating from Australia were purchased and analysed for targeted pyrrolizidine alkaloids (PAs) using a new and rapid isocratic LC-MS/MS method. This isocratic method was developed from, and is comparable with, a gradient elution method and resulted in no loss of sensitivity or reduction in chromatographic peak shape. Isocratic elution allows for significantly shorter run times (6 min), eliminates the requirement for column equilibration periods and, thus, has the advantage of facilitating a high-throughput analysis which is particularly important for regulatory testing laboratories. In excess of two hundred injections are possible, with this new isocratic methodology, within a 24-h period which is more than 50% improvement on all previously published methodologies. Good linear calibrations were obtained for all 10 PAs and four PA N-oxides (PANOs) in spiked honey samples (3.57-357.14 µg l(-1); R(2) ≥ 0.9987). Acceptable inter-day repeatability was achieved for the ta...
Growth and dominance of the cyanobacterium Anabaena circinalis in weir pools of the Barwon-Darlin... more Growth and dominance of the cyanobacterium Anabaena circinalis in weir pools of the Barwon-Darling River, Australia, are related to persistent vertical thermal stratification between October and March, when discharge is low. We determined critical velocities and discharges required to suppress bloom formation at three sites, and modelled the occurrence of sub-critical dis- charges in order to predict the frequency of
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 2015
Honey samples originating from Australia were purchased and analysed for targeted pyrrolizidine a... more Honey samples originating from Australia were purchased and analysed for targeted pyrrolizidine alkaloids (PAs) using a new and rapid isocratic LC-MS/MS method. This isocratic method was developed from, and is comparable with, a gradient elution method and resulted in no loss of sensitivity or reduction in chromatographic peak shape. Isocratic elution allows for significantly shorter run times (6 min), eliminates the requirement for column equilibration periods and, thus, has the advantage of facilitating a high-throughput analysis which is particularly important for regulatory testing laboratories. In excess of two hundred injections are possible, with this new isocratic methodology, within a 24-h period which is more than 50% improvement on all previously published methodologies. Good linear calibrations were obtained for all 10 PAs and four PA N-oxides (PANOs) in spiked honey samples (3.57-357.14 µg l(-1); R(2) ≥ 0.9987). Acceptable inter-day repeatability was achieved for the ta...
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Papers by Simon Mitrovic