Methoden zur quantitativen Bestimmung des Arsenwasserstoffgehaltes von Gasen

Improvements in the arsine accumulation-helium glow detector procedure for determining traces of arsenic

“…The peak heights obtained for given quantities of AsH3 introduced in this way agreed to within ±2% with those obtained when the AsH3 was generated by treating the corresponding amount of As033+ or As043+ with NaBH4. The supplier's value for the concentration of AsH3 in the analyzed mixture was confirmed by agitating measured amounts of this gas mixture in closed vessels with alkaline KMn04 solution, elemental bromine (11), and acid Ce4+ solution (12). Recoveries were >97% of theoretical.…”