Development and application of a HPIC-ICP-MS method for the redox arsenic speciation in river sediment pore waters

Abstract

A HPIC-ICP-MS method has been developed to directly determine As redox speciation in filtered sediment pore waters without pre-treatment step.

Determination of total arsenic using a novel Zn-ferrite binding gel for DGT techniques: Application to the redox speciation of arsenic in river sediments

“…It is added on line in all samples at around 15 mg L À 1 using a trident kit (Glass expansion) that is connected next to the peristaltic pump. Arsenic speciation in solution is determined by coupling ICP-MS to a High Performance Ion Chromatography (HPIC; Dionex ICS 5000 þ TC and SP) following the procedure described by Gorny et al [6].…”

“…They are generally divided into several steps: (i) sediment core sampling; (ii) core cutting into slices under nitrogen atmosphere; (iii) centrifugation of slices under N 2 ; (iv) filtration of the supernatants under N 2 ; (v) possible addition of stabilizing agents; and finally (vi) analyses of pore waters with speciation tools, e.g. voltammetry [4], hydride generation [5], High Performance Ionic Chromatography-Inductively Coupled Plasma Mass Spectroscopy (HPIC-ICP-MS) [6][7][8], etc. Due to high number of steps required, these approaches may be a source of potential errors (e.g.…”

Atomic Spectrometry Update: review of advances in elemental speciation

“…The following masses 12 C, 12 C 14 N, 12 C 15 N 28 Si, 32 S, 76 Se, 77 Se, 80 Se and 82 Se were simultaneously detected by using a Nano-SIMS50L. Cells were exposed to 150 nmol L À1 82 Se IV , 600 nmol L À1 77 SeMet and 300 nmol L À1 Met 76 SeCys and subsequently grown in either well plates or on an Au-coated silicon chip (5 mm  5 mm).…”

A rapid and sensitive IC-ICP-MS method for determining selenium speciation in natural waters

“…To provide analysts with a rapid and sensitive method for Se speciation in freshwater, we tested the use of dilute nitric acid (HNO 3 ) as a mobile phase. This offers some advantages to other mobile phases with basic or near-neutral pH: i) it prevents precipitation of iron (Fe) and aluminum (Al) (hydr)oxides in samples taken from acidic 21 or anoxic waters, 22 ii) eliminates the need for salt or organic solvent-based eluents that can also be undesirable for interfacing IC with ICP-MS, thus improving detection limits as well as reducing maintenance costs 23 and iii) HNO 3 is already commonly used for ICP-MS analyses and can be distilled and purified to the extent necessary to achieve the desired background concentrations (blank values).…”