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Retrospective Study
Copyright: ©Author(s) 2026.
World J Gastrointest Surg. Sep 27, 2026; 18(9): 118081
Published online Sep 27, 2026. doi: 10.4240/wjgs.118081
Table 1 Mobile phase composition
Ionization mode
Phase A
Phase B
ESI(+)0.1% HCOOH in H2O0.1% HCOOH in ACN
ESI(-)5 mM ammonium formatACN


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