TY - RPRT TI - Negative ion electrospray high-performance liquid chromatography-mass spectrometry method development for determination of a highly polar phosphonic acid/sulfonic acid compound in plasma. Optimization of ammonium acetate concentration and in-source collision-induced dissociation. AU - M Jemal AU - R Almond AU - Z Ouyang AU - D Teitz PY - 1997 DO - 10.1016/s0378-4347(97)00427-1 UR - https://pubmed.ncbi.nlm.nih.gov/9448073/ ID - 9448073 ER -