Die potentiometrische Mikrobestimmung von Kupfer in organischen Verbindungen nach Verbrennung in einem modifizierten Sch�niger-Kolben

Potentiometric Microdetermination of Tungsten in Organic Compounds after Combustion in a Modified Oxygen Flask

“…Without boiling the basket, the recoveries of W are poor. It is therefore necessary to use an oxygen flask with detachable Pt basket (15,16) absorption solution (3 ml of 1 M NaOH). Boiling of the absorption solution for a few minutes as described under Procedure ensures then a complete dissolution of WO 3 .…”

“…A modified oxygen flask, described previously (15,16), consisted essentially of a 300-ml round-bottom flask, provided with a short test tube sealed to its bottom and equipped with a ground stopper to which an original detachable U-shape Pt basket was connected.…”