“…The scheme of the setup for y ash burning: 1 Å tubular electric furnace, 2 Å quartz tube, 3 Å sample, 4 Å quartz tube for air supply, 5 Å a collection of stainless steel, 6 Å a collection of gold foil, 7 and 8 Å traps with 6 M NaOH solution, 9 Å carbon ˇlter, 10 Å membrane pump volatile compounds. The carbon ˇlter was located at the exit of gases from the column (9). After each experience fractions deposited at different temperatures were collected.…”