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(4) Liquid chromatography-mass spectrometry (LC-MS)
In GCs Residue Analysis, HPLC Method mutually indistinguishable epimers of dexamethasone pine and betamethasone , though the GC-MS analysis can be qualitative, but requires a complicated derivatization process
1) APCI ionization
Cherlet et al.
2) ESI ionization
A.
Pavlovic et al.
B.
Chen et al.
Li et al.
Yang et al.
Tong Ying et al.