Determination of impurities in sodium by lanthanum hydroxide carrier

May 1, 2002 - Zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten. Robert Z. Bachman and Charles V. Banks. Analytical ...
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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 (