Morris W J, Nandrea G J, Roybal J E, Munns R K, Shimoda W, Skinner H R
J Assoc Off Anal Chem. 1987 Jul-Aug;70(4):630-4.
Extracts from 4 types of swine feed containing 0.11 ppm each of dimetridazole (DMZ) and ipronidazole (IPR) were analyzed by capillary gas chromatography/mass spectrometry (GC/MS) using multiple ion detection (MID) techniques. We demonstrate in this paper that the quantitative results obtained by capillary GC/MS with MID are comparable for both compounds to results obtained by liquid chromatography and have a lower coefficient of variation for DMZ. Moreover, consistency in the ion ratios (5 ions in DMZ and 6 ions in IPR) permits identification of these compounds by electron ionization MS.
采用多离子检测（MID）技术，通过毛细管气相色谱/质谱联用仪（GC/MS）对4种猪饲料提取物进行分析，每种提取物中均含有0.11 ppm的二甲硝唑（DMZ）和异丙硝唑（IPR）。本文证明，采用MID的毛细管GC/MS所获得的这两种化合物的定量结果与液相色谱法所获得的结果具有可比性，并且DMZ的变异系数更低。此外，离子比率（DMZ中有5个离子，IPR中有6个离子）的一致性使得能够通过电子电离质谱对这些化合物进行鉴定。
