Evaluation of a Low‐Cost Arsenic and Selenium Determination at Microgram‐per‐Liter Levels

Abstract

New methods and modifications of known methods of detecting arsenic and selenium in water are described. Whereas the previous procedures for these elements are extremely tedious and time consuming, these new procedures can be performed in a few minutes—thereby permitting routine monitoring of water supplies for As and Se.

Inorganic interference study of automated arsenic and selenium determination with atomic absorption spectrometry

“…In the analysis of selenium and arsenic, zinc and stannous chloride are used extensively in the hydride atomic absorption method (1). The automation of the hydride method is probably most effectively accomplished with the use of NaBH4 as the reducing agent, because of the simplicity of the automated design.…”

Optimization of arsine generation in atomic absorption arsenic determinations

“…Volatile hydride generation combined with atomic absorption determination of the metal hydride serves as a simple and extremely sensitive analytical method for several metalloids. Varieties of this technique have been in use for several years (1)(2)(3)(4)(5)(6)(7)(8). All of the major atomic absorption instrument manufacturers as well as several accessories firms now offer equipment permitting more or less rapid modification of standard instruments for these analyses.…”

Pneumatoamperometric determination of parts-per-billion dissolved species by gas evolving reactions

“…Methods based on the direct determination of hydrides are subject to a number of interferents, including the formation of other volatile species, e.g., AsHa, SbHa, SnH4, SeH2, and Hg (9,10). Moreover, direct determination of these hydrides does not provide for simultaneous determination of two or more hydrides formed concurrently.…”

“…The collected AsHa is then analyzed by AAS. Detection limits of about 1 ng As are reported for this method (10,11).…”