Determination of impurities in sodium by lanthanum hydroxide carrier

Pacific Northwest Laboratory, Battelle Memorial Institute, Richland, Wash. ... 607 (1961). (2) M. C. Farquhar, J. A. Hill, and M. M. English, ibid., 3...
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concentration as the blank, partly because of a small amount of copper impurity in the tannic acid. Determinations of copper in the samples by atomic absorption (Table 111) without using organic enrichment techniques showed this low concentration (