| 摘要 |
FIELD: chemistry.SUBSTANCE: method of molybdenum identification includes the determination of a complex compound of molybdenum with diethyldithiocarbaminate by cathode voltammetry . According to the invention 0.02 ml 1·10-4 M of sodium diethyldithiocarbaminate are introduced into a universal buffer solution, then a sample, which contains molybdenum is introduced, the solution is mixed for 10-30 s, a potential of electrolysis +0.4 V is supplied for 180 s on a glassy carbon electrode and current of a molybdenum peak is registered at a speed of the potential involute of 100 mV/s. A signal of molybdenum is registered and evaluated by a method of additives of certified solutions relative to a saturated silver chloride electrode.EFFECT: invention makes it possible to reduce a lower boundary of determined contents of molybdenum by 2-3 orders.2 dwg, 1 tbl |
