Liquid chromatography—mass spectrometry with on-line solid-phase extraction by a restricted-access C18 precolumn for direct plasma and urine injection
1997 ◽
Vol 762
(1-2)
◽
pp. 193-200
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2007 ◽
Vol 1152
(1-2)
◽
pp. 97-115
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2014 ◽
Vol 37
(20)
◽
pp. 2929-2939
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2017 ◽
Vol 18
(1)
◽
pp. 50-61
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2013 ◽
Vol 93
(9)
◽
pp. 970-983
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2020 ◽