Extraction and spectrophotometric determination of niobium by tetraphenylarsonium and phosphonium chloride from a hydrochloric acid solution
1984 ◽
Vol 30
(2)
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pp. 178-185
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2003 ◽
Vol 70
(5)
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pp. 729-732
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1990 ◽
Vol 55
(7)
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pp. 1686-1690
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2011 ◽
Vol 142
(8)
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pp. 769-772
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1964 ◽
Vol 85
(10)
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pp. 647-651,A51
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2019 ◽
Vol 13
(6)
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pp. 350
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