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A model for laser ablation under conditions which are typical for LA-ICP-MS (He or Ar atmosphere, fluences below 100 J cm −2 ) is proposed that identifies the melted and subsequently re-solidified portion of the heated sample as a possible source for element-specific fractionation. Based on the...
A model is proposed that identifies Kelvin–Helmholtz instabilities as one of the major sources of large particle production in LA-ICP-MS measurements under optimized conditions. The model describes the impact transfer from the expanding plasma to the liquid melt layer and the subsequent...
The ion and electron populations of a glow discharge that uses an electrolytic solution as the cathode (an electrolyte-cathode discharge or ELCAD) were investigated. This paper presents the first determinations of electron number density, ionization temperature, and degrees of ionization in the...
The effect of the addition of hydrogen to a radiofrequency–argon glow discharge coupled to a time of flight mass spectrometer has been studied. Pressure and forward power conditions in the discharge were kept constant. The hydrogen concentrations added to the argon plasma gas were 0.5%, 1% and...
A sequential/bead injection lab-on-valve apparatus incorporating a renewable microcolumn packed with co-polymeric immobilized C 18 microbeads was applied to the on-line co-precipitate separation/preconcentration of ultra-trace cadmium by hyphenating with hydride generation atomic fluorescence...
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