The ppt. is washed with hot water and dissolved in exactly 50 ml. of 0.025 M Complexone III soln. and 5 ml. of 0.5 N NaOH soln. by boiling for 2-4 min until the soln. is ... To determine B in various types of mineral an extraction- photometric method is used, based upon a fluorine complex of B with Crystal Violet. ... An ISP- 22 spectrograph was used with a PS-39 or a DG-1 arc generator with a circuit breaker.
|Title||:||U.S.S.R. Abstracts of Metallurgy|