Reagents and chemicals employed are described in detail in a previous work [31 (link)].
Methanol (MeOH) and acetonitrile (ACN), (HPLC grade) and Chloroform (CHCl3) (99% grade) were purchased from Merck (Darmstadt, Germany). Ethyl acetate (EtOAc) (HPLC grade 99.5+%) was supplied by Alfa Aesar (Karlsruhe, Germany). Deionized water (resistivity > 18 MΩ cm−1) was obtained from a Milli-Q SP® Reagent Water System (Millipore Corporation, Bed-ford, MA, USA). Ammonium formate salt (99%) was obtained from Panreac Quimica S.A.U. (Barcelona, Spain) and sodium chloride (NaCl) was supplied by VWR Chemicals (Leuven, Belgium). Formic acid (reagent grade ≥ 95%) was supplied by Sigma-Aldrich (St. Louis, MO, USA). Enniatin standards (ENNA, ENNA1, ENNB and ENNB1) were purchased from Sigma (St. Louis, MO, USA).
Methanol (MeOH) and acetonitrile (ACN), (HPLC grade) and Chloroform (CHCl3) (99% grade) were purchased from Merck (Darmstadt, Germany). Ethyl acetate (EtOAc) (HPLC grade 99.5+%) was supplied by Alfa Aesar (Karlsruhe, Germany). Deionized water (resistivity > 18 MΩ cm−1) was obtained from a Milli-Q SP® Reagent Water System (Millipore Corporation, Bed-ford, MA, USA). Ammonium formate salt (99%) was obtained from Panreac Quimica S.A.U. (Barcelona, Spain) and sodium chloride (NaCl) was supplied by VWR Chemicals (Leuven, Belgium). Formic acid (reagent grade ≥ 95%) was supplied by Sigma-Aldrich (St. Louis, MO, USA). Enniatin standards (ENNA, ENNA1, ENNB and ENNB1) were purchased from Sigma (St. Louis, MO, USA).
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