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10.
(1) Liquid chromatography conditions
Chromatographic column: Atlantis C 18 , 3μm, 150mm×2.
Table 10-3 Mobile phase, flow rate and gradient elution conditions
(2) Mass spectrometry conditions
Ion source: Electrospray ion source (ESI); Scan mode: Negative ion scan; Detection mode: Multi-reaction monitoring; Curtain gas pressure: 0.
Table 10-4 Qualitative ion pair, quantitative ion pair, declustering voltage and collision energy of glucocorticoid
(3) Qualitative determination
Choose 1 parent ion and 2 product ions for each tested component.
(4) Quantitative determination
Quantification by external standard method
Figure 10-19 Multiple response monitoring (MRM) chromatograms of glucocorticoids
Related links: Determination of 9 glucocorticoid residues in puffer fish, eels and grilled eels by liquid chromatography-tandem mass spectrometry