IDENTIFICATION OF POSITIVE REACTANT IONS OBSERVED FOR NITROGEN CARRIER GAS IN PLASMA CHROMATOGRAPH MOBILITY STUDIES
IDENTIFICATION OF POSITIVE REACTANT IONS OBSERVED FOR NITROGEN CARRIER GAS IN PLASMA CHROMATOGRAPH MOBILITY STUDIES
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DOI：
10.1021/ac60362a029
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发表时间：
1975-01-01
影响因子：
7.4
通讯作者：
HORNING, EC
中科院分区：
文献类型：
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作者：
CARROLL, DI;DZIDIC, I;HORNING, EC
用等离子体色谱-质谱联用仪（PC-MS）测定了在160 ℃和7 ppm水浓度下，氮气载气的正离子迁移率研究中观察到的三个主峰的离子种类。这些物种是：I，NH 4+与约7%的NH 4+（H2O）; II，NO+与约10%的NO+（H2O）; III，H+（H2O）2和H+（H2O）3以约7：3的比率，分别对于显示出3.00、2.62和2.32cm 2 v-1 sec-1的降低的迁移率的离子峰。基于假定的迁移率和质量测量的等效性的文献鉴定是错误的。Shahin（1）的早期质谱研究，采用大气压下空气中的电晕放电，表明H+（H2O）n离子应该是在等离子体色谱仪中用氮气载气观察到的正离子迁移率谱中的主要物质。在富兰克林GNO Corporation（2）使用等离子体色谱-质谱仪（PC-MS）组合仪器证实了这一点。还发现存在离子NO+和NO+（H2O）（3）。
A Plasma Chromatograph-mass spectrometer (PC-MS) combined Instrument was used to define the Ion species re-sponsible for the three major peaks observed In positive Ion mobility studies of nitrogen carrier gas at160 C and 7 ppm water concentration. These species are: l, NH4+ with about 7% of NH4+(H20); II, NO+ with about 10% of NO+(H20); III, H+(H20) 2 and H+(H20) 3 In about 7: 3 ratio, for ion peaks showing reduced mobilities of 3.00, 2.62, and 2.32 cm2 v-1 sec-1, respectively. Literature Identifications basedupon presumed equivalence of mobility and mass measurements are in error.The early mass spectrometric studies of Shahin (1), employing a corona discharge in air at atmospheric pressure, indicate thatH+(H20)„ions should be the dominant species in positive ion mobility spectra observed with nitro-gen carrier gas in the Plasma Chromatograph. This was confirmed using a Plasma Chromatograph-mass spectrom-eter (PC-MS) combined instrument at Franklin GNO Corporation (2). The ions NO+ and NO+(H20) were also found to be present (3).