Analytical methods for arsenic speciation analysis

Abstract

Arsenic exists in the form of various chemical species differing in their physicochemical behaviour, toxicity, bioavailability and biotransformation. The determination of arsenic species is an important issue for environmental, clinical and food chemistry. However, differentiation of these species is a quite complex analytical task. Numerous speciation procedures have been studied that include electrochemical, chromatographic, spectrometric and hyphenated techniques. This review presents the relevant research in the field of arsenic speciation analysis with novel applications and significant advances. Stability of arsenic species and each of the analytical steps (sample collection, storage, preservation, extraction) of the arsenic speciation methods is particularly evaluated. Analytical validation and performance of these methods are also reviewed.

Approved Method of Recovery Arsenic by Using Reference Materials by FI-HG-AAS

“…The Perkin Elmer with FIAS 200 gave good spike recoveries with no matrix interference. Extraction and analysis method described in the article compared with other work done like Rajakovic et al [6], Wang et al [7], Niedzielski et al [8], highly functional and cost-effective in terms of time is. …”

Characterization of Arsenic Biotransformation Products from an Open Anaerobic Degradation of Fucus distichus by Hydride Generation Gas Chromatography Atomic Absorption Spectrometry and High Performance Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry

“…Many analytical techniques have been developed for chemical speciation of elements in the environmental samples [4,5,16]. During the last two decades substantial progress has been made in incorporating separation methods with powerful detection methods for reliable quantitative measurements [17,18]. High performance chromatography (HPLC) is one of the most common methods used for separation of nonvolatile analytes and has been extensively coupled with atomic spectroscopy for quantification.…”

“…Moreover, HPLC and GC were successfully coupled with ICP-MS and now referred to as hyphenated technique for speciation analysis. This technique is now the most frequently used analytical technique for speciation purposes [5,17,18].…”

“…On cooling, the digests were neutralized with dilute hydrochloric acid and made up to 40 mL with deionized water. Arsenic determination and speciation were carried out on the digestates, which in most cases were diluted prior to analysis by the HG-GC-AAS technique [17,19]. The hydride generation system consists of a peristaltic pump for mixing known volumes of sample (or standard) solutions with 1 M hydrochloric acid and 2% sodium borohydride.…”

Stability of Arsenic During Soil Treatment and Storage

“…In the few studies in existence the focus is placed on solid biological matrices [7], and of all the studies regarding the stability of As(V) and As(III) during solid sample storage, surprisingly, there are just one article that consider soil samples. In this study performed by Huang and Ilgen [8] MeOH-water was used as extracting agent clearly focused on the solubilization organic As species more than inorganic ones.…”