Tob. Sci., 1969, 13-19, p. 50-52, ISSN.0082-4623
Automated determination of calcium in tobacco using glyoxal-bis (2-hydrixyanil)
Philip Morris, Inc. USA Research Center, Richmond, Virginia USA
An automated procedure has been developed using glyoxal-bis (2-hydroxyanil) for colorimetric determination of calcium in tobacco after removal of phosphate interference by automated formation and extraction of phosphomolybdate into isobutyl alcohol....