An automated submicrogram determination of selenium in vegetation by quartz-tube furnace atomic-absorption spectrophotometry

Critical evaluation of analytical methods for the determination of trace elements in various matrices: Part I - Determination of selenium in biological materials and water

“…34) or electrical heating (ref. 27,31,32,[35][36][37] are described but the essential component is a silica tube about 8 mm id and 180 mm long having a side arm (2-3mmid) at midpoint for the introduction of selenide.…”

Determination of selenium in biological materials by stable isotope dilution gas chromatography-mass spectrometry

“…However, the atomic absorption method of choice has been selenium hydride formation (4, [11][12][13]. The methods of atomization and analysis have included flame (14,15), quartz tube (16,17), and atomic fluorescence spectrometry (18,19). However, there have been some problems associated with the hydride generation method (4,20).…”

Arsenic in sediments, water and aquatic biota from lakes in the vicinity of Yellowknife, Northwest Territories, Canada

“…The semi-automatic, flameless (quartz cell) method (Vijan and Wood 1974) was used to determine arsenic in invertebrates and aquatic vegetation, however, a quartz tube with one end-window (with gas input near the closed end) rather than a windowless tube, was used. The samples (up to 0.2 g dry weight) were digested (in batches of 50) in 20 x 150 mm Pyrex tubes, (in an aluminum block) in an acid mixture (5 ml nitric, 2 ml sulfuric, and 0.5 ml perchloric), the digests were cooled, made up to volume (25 ml) with distilled water, and aliquots were measured into sampling cups of an automatic sampling system.…”