Communication. Preparation of a stable borohydride solution for use in atomic-absorption studies

Abstract

Material for publication as a Communication must be on a n urgent matter and be of obvious scienti$c importance. Rapidity of publication is enhanced i f diagrams are omitted, but tables and formulae can be included. Communications should not be simple claims for priority: this facility for rapid publication i s intended for brief descriptions of work that has progressed to a stage at which it i s likely to be valuable to workers faced with similar problems. A fuller paper may be ofleered subsequently, if justified by later work.Manuscripts are not subjected to the usual examination by referees and inclusion of a Communication i s at the Editor's discretion.

Spectrophotometric determination of arsenic in soil samples using 2-(5-bromo-2-pyridylazo)-5-di-ethylaminophenol (Br-PADAP)

“…Sodium borohydride (III) solution. A 10.00 % (m/v) NaBH 4 (Aldrich) solution was prepared in a 2.00 % (m/v) NaOH solution (Aldrich) before use [19].…”

Reagent injection FIA system for lead determination by hydride generation - quartz-tube atomic absorption spectrometry

“…The reductant was a 10% (m/v) sodium tetrahydroborate (Merck) solution in 0.3% (m/v) NaOH (Merck), filtered through a membrane filter (0.45 µm pore size) following the procedure described by Knetchel [21]. Although the filtered solution (stored in darkness at 4°C) was stable for at least two weeks, it was prepared once a week and kept under the aforementioned conditions.…”

Preparation of biological materials for determination of selenium by hydride generation-atomic absorption spectrometry

“…Several wet digestion and dry ashing procedures have been developed that give complete recovery of added selenium. The most widely used wet digestion procedure for biological materials employs HN03, H2S04, and HC104 (2)(3)(4)(5)(6)(7). This procedure is well suited for the destruction of the organic matrix while maintaining the selenium in an oxidized state to prevent its loss by volatilization, but requires an exhaust hood designed specifically for handling HC104 fumes.…”