Thin Layer Chromatography of Purines on Silica Gel G Impregnated with Transition Metal Ions; Assay of Caffeine and Theophylline in Pharmaceutical Formulations
2003 ◽
Vol 50
(5)
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pp. 1031-1036
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1987 ◽
Vol 162
(2)
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pp. 427-429
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1991 ◽
Vol 585
(2)
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pp. 359-363
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1984 ◽
Vol 19
(6-7)
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pp. 429-443
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1987 ◽
Vol 404
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pp. 73-85
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1989 ◽
Vol 12
(6)
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pp. 937-947
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1969 ◽
Vol 45
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pp. 161-162
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1975 ◽
Vol 106
(1)
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pp. 230-234
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1980 ◽
Vol 193
(3)
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pp. 421-426
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