New approach of a transient ICP-MS measurement method for samples with high salinity

Fit-for-Purpose ICP-MS Procedure Supporting Brazilian Regulations on Inorganic Constituents in Fresh and Saline Waters

“…The measurements performed in He mode allowed accurate determinations of elements whose isotopes were affected by spectral interferences. (13) 102 (4.6) IS: internal standard; RSD: relative standard deviation; HMI: high matrix introduction; NA: not applicable. a Analytical solutions prepared by matrix-matching with 3.5% m v -1 NaCl and sample analysis without dilution; b analytical solutions prepared by matrix-matching with 1.75% m v -1 NaCl and sample analysis after 2-fold dilution; c analytical solutions prepared with 1% v v -1 HNO 3 and samples analysis after 5-fold dilution.…”

“…However, by increasing HMI gas flow rate (> 0.50 L min -1 ) it was observed that CeO + /Ce + ratio did not vary significantly in most NaCl concentrations. Previously, Hein et al 13 proposed an analytical procedure for analysis of highly saline samples by ICP-MS with an ultra-high matrix introduction system (UHMI). This procedure was suitable for determining metal ions, such as Eu and U in samples with salinities up to 5 mol L -1 NaCl.…”

“…In other studies, hydroxide formation was lower than 0.02% when HMI system was used. 8,13,15 Evaluation of accuracy and internal standardization…”

“…[7][8][9] Additionally, high matrix introduction (HMI) technology uses auto-optimization of aerosol dilution to further improve matrix tolerance, reducing both aerosol density and water vapor loading in the plasma. 8,[10][11][12][13][14][15][16] Wilbur and Jones 8 demonstrated the benefits of HMI system for determination of 26 elements in complex matrix certified reference materials (CRM), such as river sediment and soil samples. Aqueous samples were investigated using fast protein liquid chromatography (FPLC) coupled to ICP-MS with a high matrix introduction system.…”

“…The HMI reduced the sample aerosol transport and enabled direct analysis of separated Cr species in the presence of up to 4% m v -1 NaCl. 13 In this context, this study presents the development of an analytical procedure using a quadrupole ICP-MS operated in four acquisition modes: (i) No gas: standard mode; (ii) No gas (HMI): standard mode with HMI system; (iii) He: collision cell mode; (iv) He (HMI): collision cell mode with HMI system; for determination of Al, Ag, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Na, Ni, Pb, Sb, Se, Tl, Hg, V, U and Zn in natural fresh water (Tables I, II and III (Tables IV and V of CONAMA 357) 4 providing higher sample throughput and lower argon consumption by allowing the determination of all elements in a single run.…”