FAB-MS quantitatively analyze ligustrazine with the non-linear curve fitting of total ion current

FAB-MS 总 离子 流非线性拟合法分析川芎嗪

The total ion current showed their percentages by area normalization method .

以 总 离子 流图归一化法测定其百分含量。

Ground level total electric field strength ( TEFS ) and ion current density ( ICD ) are primary parameters influencing the electromagnetic environment of a high volt direct current ( HVDC ) line and deciding the clearance-to-ground of the line .

高压直流输电线路的地面 合成场强和 离子 流密度的水平是决定线路电磁环境和导线高度的关键性参数。

Ion power temperature : 150 ℃ . Results : The total ion current and each chromatographic peak of selected ion current were obtained and resolution of these mass spectra was elucidated . The related substances A B C and D in minocycline hydrochloride were identified .

结果：得到了样品 总 离子 流以及选择离子流相应色谱峰的ESI-MS质谱图，初步鉴定出盐酸米诺环素的主要相关物质A，B，C，D。

In this experiment the SPME and GC / MS were applied in analysis of apple fragrance components . 48 evaporative components were determined by the analysis of total ion current which was occupied 98 % of the total fragrance components calculated on the basis oi peak area .

本实验是采用SPME和GC╱MS（气质联用仪）技术分析苹果中的香气成分，分析 总 离子 色谱图，共鉴定出48种挥发性成分，按峰面积计算占其香气成分的98%。

The off-line overall efficiencies are 3.1 % for Krypton and 4.5 % for Xenon the total ion current being less than 10 μ A.

离线测定Kr和Xe的总效率分别为3.1%和4.5%，129Xe分辨本领达到360，离子源 总 离子 束 流小于10μA。

Using the expressions for ion density and total sheath potential difference the relation between ion energy flux when reaching the material surface and the driving RF current density is derived .

并利用离子浓度和 总鞘电势差的表达式推出到达材料表面时 离子的能量通量与射频驱动 电流密度的关系式。

RESULTS : 14 compounds have been identified which represent 33.24 % of the total ion current in sample ⅰ;

结果：从样品Ⅰ中鉴定了14个化合物，其含量占 总 离子 流的33.24%。

The qualitation were safety to monitored ion current ( m / z 268 ) with the mass-spectrum and diagnostic ions ( m / z ) and relative abundance and retention time of total ion current of samples showed .

监控特征离子峰（m/z268、266、231、176），以 总 离子 流的保留时间和质谱碎片的质荷比以及质谱碎片的相对丰度确保定性结果可靠。