A simple and rapid method about digestion of organotin compounds is presented. A 15 mL centrifugal tube was used in a sample digestor and a mixture of acids containing perchloric acid was used for digestion. Any one of the four titrants, Pb(NO3)2, Zn(OAc)2, CuSO4 or La(NO3)3, can be used to titrate the tin content with satisfactory accuracy. The absolute error of determination is within ?.3% and the time for treating a sample is about 30 min. Fe3+ and Hg2+ ions interfere.

Key words: LANTHANUM COMPOUNDS, COMPLEXOMETRY, MICRO ANALYSIS, NITRATE, COPPER SULFATE, NITRATE, TIN, ORGANO TIN COMPOUNDS, EDTA, LEAD COMPOUNDS