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                        Instrument ESI or  Reference Ion Assignment  Ions  APCI  21 [RDX + CH 3 COO] – [M + 59] –  ESI Quadrupole  33 [M + 44] –  ESI Quadrupole  [M + 45] –  [RDX + CH 3 COO] – [M + 59] –  [M + 75] –  39 [RDX+NO 2 -H] – [M + 45] –  ESI Triple quadrupole [RDX+NO 2 +CH 3 O+2H] – [M + 75] –  38 [RDX + CHOO] – [M + 45] –  ESI Ion
                   Adduct ions in LC/MS Mass Spectra of RDX





                           2 mM ammonium acetate  (NH 4 )COOCH 3 5 mM ammonium acetate  (NH 4 )COOCH 3  No additive  NH 4 HCOO  No additive  0.5% ammonium acetate  NH 4 CH 3 COO  NH 4 OH  1 mM ammonium nitrate

                        Additive             10 mM ammonium formate  0.5% ammonium hydroxide











                   Table 6.2  Mobile phase  Acetonitrile–water  (50:50)  Methanol–water   (75:25)  Methanol–water   (50:50)  Methanol–water   (50:50)  Methanol–water   (50:50)  Acetonitrile  Acetonitrile  Methanol–water   (50:50)  © 2004 by CRC Press LLC
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