2012
ANALYTICAL CHEMISTRY
paper. The authors also m
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precipitated from aqueous e t h y l alcohol solution of s t y p h n i c acid a n d lead nitrate by sodium hydroxide tals of the normal salt (Figure 1) were obtained by preparing a mole mole of styphnic acid and 2 X solution of 1 X of lead nitrate in 200 mi. of 50% aqueous ethyl alcohol sud adding dropwise with efficient agitation a 0.0917N solution of sodium hydroxide. Well formed crystals of the pure normal salt are precipitated throughout the pH range up to about 3.6. As the solution becomes more basic than ~ € 1 3 . 6other , lead salts begin to appear.
