Simultaneous speciation of redox species of arsenic and selenium using an anion-exchange microbore column coupled with a micro-concentric nebulizer and an inductively coupled plasma mass spectrometer as detector

Arsenic Speciation Analysis by Ion Chromatography - A Critical Review of Principles and Applications

“…A steep gradient of potassium hydrogenphthalate (0-100 mM, 0-5 min) separated organic from inorganic arsenicals on a short column (25 mm) in less than three minutes [165] and AsIII/AsV were separated (12.5 mM malonate and 17.5 mM AcO pH 4.8) on another short column (50 mm) in less than 2 minutes [72,73]. Such short t R were also obtained on a micro column (ANX 1606AS, CETAC) with tartrate (5 mM, pH 8.5) separating AsIII and AsV [40,166]. A TRIS-buffer gradient (30-100 mM, pH 7) on a PRP-X100 column gave a better separation compared to phosphate [160].…”

Speciation analysis by small-bore HPLC coupled to ICP-MS

“…The developed method provided a good separation of the target analytes from the naturally occurring arsenic compounds, with low detection limits, small sample size (<1 μl) and reduced solvent consumption (40 μL min -1 ). Later, a similar chromatographic system was used by Wangkarn and Pergantis [12] to accomplish a fast (< 3 min) determination of As Woller et al [13] reported the simultaneous speciation of redox species of arsenic (As [15][16] reported the determination of As III , As V , MA and DMA in urine samples by anion-exchange narrowbore HPLC, using pneumatic nebulisation [15] or UV photooxidation/Hydride Generation [16] as the interface between the chromatographic system and ICPMS. The achieved detection limits were in the 0.2-0.4 μg/l range.…”

“…The MCN has been used for the analysis of samples containing high concentrations of mineral acids, high levels of dissolved solids and many other types of dissolved and inorganic materials [13]. The installation is easy and no special requirement concerning the gas supply is needed.…”

“…The installation is easy and no special requirement concerning the gas supply is needed. The MCN has been frequently used with small-bore columns coupled to ICPMS [12, 14, 34, 39-40, 53, 60], and it is commonly associated with a Scott-type doublepass spray chamber [3,8,13,15,17,52], giving stable signals and a very low noise level. As organic solvents are often present in the mobile phase, 2-5% of oxygen has to be added to the nebulisation gas or in the spray chamber in order to facilitate the combustion of the residual solvent in the plasma thus avoiding soot deposit at the torch walls [24].…”

Multiple-Element Detection in Aqueous Solution and Seawater by Using an On-line Preconcentration Method for Inductively Coupled Plasma Mass Spectrometry

“…[3][4][5] While combining with an on-line preconcentration system, 6-8 the ICP-MS may further enhance its detection sensitivity. Although ion-exchange resins have usually been adopted for matrix separation and sample preconcentration in aqueous solution, [9][10][11][12] in this work we focused on the liquid-solid sorbent extraction method as an alternative, and employed a desolvation system to improve the operation efficiency.…”