ANALYTICAL CHEMISTRY
528 Zirconium sponge, or turnings of either titanium or zirconium should be equally as effective as titanium sponge in this method. Thin turnings and a longer “packed length” may be necessary t o ensure complete absorption of impurities. ACKNOWLEDGMENT
The author Tvishes to cypress his appreciation to J. M.Thompson of this laboratory for performing the analytical work upon which this method is based. LITERATURE CITED (1)
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