Improved Gas Chromatography/Mass Spectrometry Analysis of Barbiturates in Urine Using Centrifuge-Based Solid-Phase Extraction, Methylation, with d5-Pentobarbital as Internal Standard
2011 ◽
Vol 1218
(12)
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pp. 1585-1591
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1996 ◽
Vol 741
(2)
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pp. 251-263
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2004 ◽
Vol 519
(1)
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pp. 93-101
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2012 ◽
Vol 39
(1)
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pp. 125-128
2001 ◽
Vol 759
(1)
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pp. 43-49
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2011 ◽
Vol 99
(1)
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pp. 125-131
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