Critical examination of some common reagents for reducing selenium species in chemical analysis

The elimination of selenium(IV) from aqueous solution by precipitation with sodium sulfide

“…On the other hand, separation techniques such as bacterial reduction, ion exchange membranes, electrocoagulation, and sorption have been investigated but proven either too costly or only suitable for solutions containing low levels of soluble selenium (<5 mg/L) [6,10,11]. For solutions with higher concentrations of selenium use of reductive techniques taking advantage of the favorable Se(IV)/Se reduction potential are employed [12][13][14].…”

Non-chromatographic hydride generation atomic spectrometric techniques for the speciation analysis of arsenic, antimony, selenium, and tellurium in water samples—a review

“…However, the conclusion was challenged on thermodynamic grounds by Bye [250], who suggested that the loss of Se from samples, which were boiled for too long, might be due to the formation of volatile Se(IV) compounds such as SeCl 4 or SeOCl 2 . But, Krivan et al [251], in a study using radiotracers, showed that the loss of Se was due to the back-oxidation by Cl 2 , which in turn had formed from the reaction of HCl with strong oxidizing agents like H 2 O 2 .…”

“…But, Krivan et al [251], in a study using radiotracers, showed that the loss of Se was due to the back-oxidation by Cl 2 , which in turn had formed from the reaction of HCl with strong oxidizing agents like H 2 O 2 . Bye [250] also concluded that the important component of the reducing solution was the Cl À ion and that the reduction could be carried out quantitatively in con. HCl solution.…”

Determination of Arsenic and Selenium in Food using a Microwave Digestion–Dry Ash Preparation and Flow Injection Hydride Generation Atomic Absorption Spectrometry

“…Hydrochloric acid was chosen for selenium reduction over many other options because of matrix compatibility, ease of use and e!ectiveness (Bye, 1983). Potassium iodide was utilized to reduce As> to As>, which is preferred for hydride formation.…”