Unlike atmospheric pressure ICP-AES, this low-pressure ICP system showed a much stronger intensity of the Mg II, 280.270 nm line compared to that of Mg I, 285.213 nm.Journal: Journal of Analytical Atomic Spectrometry Volume: 16 - Pages: 767-770 DOI: 10.1039/B101224J Products: 1 mm id quartz injector, PFA-ST microconcentric nebulizer/PC 3 Peltier-cooled cyclonic spray chamber Abstract: The elemental composition of fish ear stones (otoliths) is used to inform upon environmental conditions, fish migrations, population structure, and nursery areas.
On the basis of the shape of the dose-effect curves obtained for cadmium and copper respectively, we can say that the toxic effects of the two metals are different and we can hypothesize that copper could exercise its toxic activity by inhibiting the ATP-driven proton pump and the function of the Cl Products: µflow PFA-100 nebulizer Abstract: Direct nebulization of an aqueous sample was successfully carried out in our laboratory in a lab-built low pressure-inductively coupled plasma (LP-ICP) using a double membrane desolvator (DMD).
For the particular LP-ICP used, rotational temperatures of selected diatomic molecules and excitation temperatures of Fe II and Fe I were measured.
We compared two nebuliser/spray chamber configurations for determining concentrations of Mg, Ca, Mn, Cu, Zn Rb, Sr, Ba, La and Pb in acidic otolith digests using flow injection ICPMS with: (1) cross-flow nebulizer/Scott spray chamber and (2) microconcentric nebuliser/Peltier-cooled cyclonic spray chamber.
For most elements, both configurations had acceptable accuracy (within certified or indicative ranges) and precision ( Determination of phosphorus in phosphorylated deoxyribonucleotides using capillary electrophoresis and high performance liquid chromatography hyphenated to inductively coupled plasma mass spectrometry with an octopole reaction cell Date: 2003-05-09 Authors: Products: 100 µL PFA micro-flow nebulizer Abstract: The determination of phosphorus in a biologically relevant sample matrix such as DNA is described.
The migration/elution order of the deoxynucleotides investigated was obtained by comparison with the migration/retention times of commercially available d NMP's.
Furthermore it was checked if HPLC-ESI-MS can be operated under the same chromatographic conditions for the confirmation of the elution order and for the characterisation of unknown peaks.Both hyphenated techniques provide baseline separation of the four deoxynucleotide monophosphates (d NMP), which are present in the DNA chain.With CE-ICP-MS, detection limits for phosphorus down to 53 µg L (2´ -deoxythymidine-5´ -monophosphate, d TMP) (corresponding to 0.03 ng P absolute) were obtained.The fulvic acids reduced the cadmium toxicity by about the same amount as humic acids, from 4.4 to 18.6 µmol/L, but they had no effect on copper toxicity.Analysing the chemical speciation of cadmium and copper in the presence of humic components and under toxicity test conditions we can say that the appreciable decrease of EC is not related to changes in their speciation; we can hypothesize that this is due to different processes, as well as to blocking of the lysosomal membrane.Instrumental detection limits of 125 ng L for the other trace elements, were achieved under the conditions described.