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More accurate and distinct tests in Qualitative analysis are continually sought. Sing L. J. Curtman and E. Frankel showed the source of the inaccurate attending the qualtative determination of the barium ion, new methods have suggested, of which this one hopes to prove its advantages and probable superiority. A common characteristic of the elements, lead, barium, strontium, calcium and in a perculiar way, bismuth, is the fact that their ions are precipitated by the addition of the sulfate ion. This tendency is strongest with barium and least with calcium. The precipitation of bismuth is prevented by the presence of hydrocolric acid. The carbonates of lead, barium, strontium, and calcium are also quite insoluble. The usual method of Qualatitive Analysis uses the insolubility of the lead sulfate in indentifying the lead barium, strontium, and calcium are also quite insoluble.

An improved method for the qualitative separation and determination of the lead, barium, and strontium ions