Polarographic Investigations in an Ethylene Glycol Medium

Die Polarographie in nichtwäßrigen Lösungen

“…Die polarographischen Verhältnisse in Äthylenglykol zeigen sehr große Ähnlichkeit mit denen in Wasser 46 selbe wie in Wasser, wobei gegen Lithiumchlorid oder Kaliumchlorid als Leitsalz und gegen Bodenquecksilber gemessen wurde. Sauerstoff gibt auch in Äthylenglykol zwei Stufen.…”

Organic Polarography

“…can often be avoided entirely by preparing a reference electrode of suitable potential, and short-circuiting the reference electrode-dropping electrode system through a shunted galvanometer (15). A microammeter is suitable for current measurements if a condenser circuit is included for damping the oscillation of the current (40,46,63). Titration cells are described by Langer (36) and by Stock (5, 52, 54)•…”

“…The majority of the work has been carried out in mixtures of water and organic solvents. In nonaqueous media such as acetic acid (5), formamide, ethyl alcohol, methyl alcohol, glycerol (102), and ethylene glycol (46), the waves are lower and in some cases more drawn out than those obtained for the same concentration in water.…”

Polarographic Studies in Acetonitrile

“…The polarographie studies of organic compounds have been limited to a great extent by their solubility and stability towards hydrolysis in mixtures of water and miscible organic solvents. Most of the nonaqueous media investigated thus far have been compounds with hydroxyl groups, e.g., alcohols, glycerol (1), ethylene glycol (2), methyl cellosolve (3), and acetic acid (4), and have had the second limitation. Formamide (1), which does not have this grouping, has been used to only a very limited extent in polarography.…”