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Posted by / 08-Jun-2019 07:41

Sm nd dating method

The analytical methodology used is based on a robust on-line coupling of capillary electrophoresis (CE) or high performance liquid chromatography (HPLC) with inductively coupled plasma mass spectrometry, equipped with an octopole reaction system (ORS-ICP-MS).Polyatomic ions formed in the plasma and the interface region of the ICP-MS that interfere with the determination of P at mass 31 were minimised by the addition of helium to the collision cell.The excitation temperature of Fe I was measured to be about 6000 K.Noticeably, the excitation temperature of Fe ion was high, and even higher than that reported in an atmospheric ICP.A relative standard deviation (RSD) of 4.3 - 8.5% for ETV was obtained, while 2.15 - 6.84% RSD was found for DMD.

The dimensions of the torch are similar to that of a mini-torch, but there is no intermediate tube.As the flow rate of the plasma gas changed from 0.2 to 1.0 L min and the flow rate ratio of the inner to the outer gas was fixed at 5:2, the S/B of Mg II doubled while the OH emission intensity decreased by approximately 67%.The chamber pressure was maintained in the range of a few Torr, which also influenced system optimization.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.

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