TY - JOUR
T1 - Comparison of different liquid chromatography methods for the determination of corticosteroids in biological matrices
AU - Stolker, A.A.M.
AU - Schwillens, P.L.W.J.
AU - van Ginkel, L.A.
AU - Brinkman, U.A.T.
PY - 2000
Y1 - 2000
N2 - Various extraction techniques can be combined with column liquid chromatography (LC) and ultraviolet (UV) or mass spectrometric (MS) detection for the determination of synthetic corticosteroids in biological matrices. Target analysis of low concentrations of 25 μg/kg of dexamethasone in feed can be performed by combining immunoaffinity chromatography (IAC) and LC with UV detection. A straightforward multi-analyte procedure is obtained by tandem solid-phase extraction (SPE) and subsequent LC-UV. However, the limits of detection for feed samples are then relatively poor, viz. 100 μg/kg. A multi-analyte method which meets modern demands of about 5 μg/kg detection limit requires one-step SPE combined with LC-MS analysis. As regards urine corticosteroids can be determined down to a level of 0.5 μg/l by either SPE-LC-MS-MS or SPE(IAC)-LC-MS. Copyright (C) 2000 Elsevier Science B.V.
AB - Various extraction techniques can be combined with column liquid chromatography (LC) and ultraviolet (UV) or mass spectrometric (MS) detection for the determination of synthetic corticosteroids in biological matrices. Target analysis of low concentrations of 25 μg/kg of dexamethasone in feed can be performed by combining immunoaffinity chromatography (IAC) and LC with UV detection. A straightforward multi-analyte procedure is obtained by tandem solid-phase extraction (SPE) and subsequent LC-UV. However, the limits of detection for feed samples are then relatively poor, viz. 100 μg/kg. A multi-analyte method which meets modern demands of about 5 μg/kg detection limit requires one-step SPE combined with LC-MS analysis. As regards urine corticosteroids can be determined down to a level of 0.5 μg/l by either SPE-LC-MS-MS or SPE(IAC)-LC-MS. Copyright (C) 2000 Elsevier Science B.V.
U2 - 10.1016/S0021-9673(00)00725-1
DO - 10.1016/S0021-9673(00)00725-1
M3 - Article
SN - 0021-9673
VL - 893
SP - 55
EP - 67
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1
ER -