Reduction of water loading effects in inductively coupled plasma mass spectrometry by a Nafion membrane dryer device

Elimination of nitric acid interference in ICP-AES by using a cyclonic spray chamber/Nafion membrane-based desolvation system

“…The desired heating temperature was set by a temperature controller in contact with the heating tape through a thermistor. Air was driven at 3 l min 21 , counter to the aerosol stream direction, through the outside wall of the membrane tube. As the solvent vapor passes through the dryer, a large fraction may be absorbed on the membrane surface and then desorbed by the sweep gas.…”

“…8,[11][12][13] With this spray chamber design the emission signal reduction induced by the presence of nitric acid has been reported to be more pronounced at low liquid flows. 9,10,13,14 Thus, with 1 mol l 21 HNO 3 solutions, a signal reduction of 40% was obtained for a liquid flow of 30 ml min 21 while the matrix effect was almost eliminated by working at liquid flow rates higher than 80 ml min 21 . 10 Traditionally desolvation systems have been used in atomic spectrometry to reduce the solvent load to the plasma.…”

“…For this reason, a non-porous Nafion membrane has been suggested as a good alternative to PTFE porous membranes. Until now, Nafion membranes have been exclusively used to reduce the solvent vapor load (i.e., water) in the plasma in ICP-AES, MPT-AES and ICP-MS. 18,[21][22][23] However, to the authors' knowledge, these type of membranes have never been used to eliminate the matrix interference produced by mineral acids in atomic spectrochemical techniques.…”

Determination of radium-226 in environmental samples by inductively coupled plasma mass spectrometry after sequential selective extraction

“…12 The Aridus desolvation injector has already been shown to be a powerful tool for reducing oxide and hydroxide formation. 19 Even if 18 O is not the most abundant oxygen isotope, 208 Pb 18 O can still result in a significant apparent signal at m/z ~226. Thus, an Aridus desolvation injector was used throughout this experiment in order to reduce the possibility of 208 Pb 18 O formation by limiting the water loading in the plasma and enhancing the instrument sensitivity.…”

Trends in instrumentation and data processsing in ICP-AES : Plenary Lecture

“…42 However, solvent loading may exceed what is tolerated by a plasma, usually in the range 20-40 mg min 21 . [44][45][46][47][48][49] In any case, a high power of at least 1500 W is required to minimize matrix effects.…”