A new purification method based on a thiol silica column for high precision antimony isotope measurements

Abstract

In this study, a new purification procedure for high precision Sb isotopic analysis was developed by using a thiol silica gel column and applied to determine Sb isotope composition in...

A single-step purification method for the precise determination of the antimony isotopic composition of environmental, geological and biological samples by HG-MC-ICP-MS

“…A 55 single-step procedure using thiol-functionalized material 56 (cotton fibres or cellulose powder) was sufficient for the 57 purification of water samples even at low Sb concentration 58 (river water, groundwater) 13,15,16 or for solid samples highly 59 concentrated with Sb (stibnite) 16 . However, we faced major 60 drawbacks using these materials such as extended processing 17 proposed a new single-step purification method based 4 on thiol-functionalized silica. Antimony was successfully 5 purified (Sb recovery of 95.2%) from water samples 6 contaminated by the Xikuangshan antimony mine (China) that presented extremely high Sb concentrations (up to 30 mg L -1 ).…”

“…11 Depending on the Sb concentration in purified samples, 12 different sample introduction techniques have been applied for 13 MC-ICP-MS analysis (Table 1). For high Sb concentration (> 50 14 µg L -1 ), wet plasma conditions [14][15][16] or a desolvation system 17 1). In addition, even though the purification 21 step remains essential to remove hydride forming elements 22 (e.g.…”

“…This material, synthesised by the French company Sikémia®, is 32 a mesoporous material; it has a high porosity and is calibrated in size 33 and specific surface area, which is 10 4 times larger than cellulose 34 used in our previous study 13 . Thiol-functionalized silica has a high 35 adsorption capacity for various metals (Pb, Pd, Hg, Cd…) 22-25 36 including for Sb 17 . TSP can be easily packed in disposable cartridges 37 connected to a peristaltic pump to provide continuous flow 38 processing at a constant rate.…”

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…stibnite) was favoured because it was thought most likely to detect micrometre-scale processes reflected in the Sb isotopes. A new purification technique for Sb isotopes was designed by Li et al 180 They pre-reduced the sample using KI and ascorbic acid before a thiol silica column, eluted with HCl, was used to separate Sb from matrix elements. The approach did not appear to cause any isotope fractionation.…”

New Analysis Protocol for Stable Isotopes by a Standard Doping Method─An Example of Antimony

“…Then, the purified antimony isotope was injected into plasma through hydride generation (HG), which can increase the analyte sensitivity. Since then, many other researchers have been developing and improving the antimony isotope analytical methods − (Table S2), although these methods are often only applicable to specific sample types (e.g., glass and drainage water) with a recovery rate varying from 76 to 104%.…”