A study on determination of theophylline in plasma and urine sample using electromembrane extraction combined with high-performance liquid chromatography–ultraviolet
2005 ◽
Vol 824
(1-2)
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pp. 327-332
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2011 ◽
Vol 701
(2)
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pp. 181-188
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2015 ◽
Vol 12
(1)
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pp. 539-548
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1988 ◽
Vol 447
(3)
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pp. 272-276
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