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- Abstract The production and recognition of some interference peaks whieh oftenoccur in metastable ion spectra by V-scan,E-scan and linked scan are summa-rized. 摘要 本文对V扫描、E扫描及联合扫描亚稳离子谱中出现的各种干扰峰的产生及识别进行讨论。
- The results from the P.Graham and Castleman's study on CH3I also supported this conclusionIn the mass spectra ,the parent ion peak was clearly recorded . Graham等人及Castleman等人在790nm左右飞秒激光系统下也分别对碘甲烷分子进行了研究，都认为碘甲烷分子先电离然后解离。
- The results shows the molecular ion peak m/z 364[M+H]+, m/z156, were detected by ESI-MS; m/z363[M]+ and m/z138,m/z181 and m/z154, m/z221 were detected by EI-MS. 用ESI-MS获得m/z364[M+H]+、m/z156等质谱峰,用EI-MS获得m/z363[M]+、m/z138、m/z181、m/z154、m/z221等质谱峰,并解释了其中的主要特征碎片离子。
- The results showed that the molecular ion peak of Aris A A is rather strong in the mass spectrum,the detection limit is 5 ng(signal to noise ratio=10). The sensitivity is high enough to determine Aris A A in CTPM. 测定结果表明;马兜铃酸A的质谱有较强的分子离子峰;最低检测限为5 ng(信噪比等于10);可以满足对中成药中马兜铃酸A测定之要求.
- During the growth period,the N 2 O emission reached the maximum value during booting period,and the emiss ion peak value was advance date. At the later period of t he growth,the N 2 O emission was weak,and the peak valu e was delayed. 小麦生育期耕作层土壤N2O排放以孕穗期最大,且排放峰值提前,而小麦生长后期(开花期和成熟期),N2O排放出现低谷,且峰值推后,反应物以土壤氮为主。
- Some thermo-unstable or nonvolayile nitrocompounds were analyzed by DEI-MS and signi-ficant molecular ion peak was obtained, and structural information was offered by fragment ions. 采用DEI-MS技术分析了一些热不稳定难于气化的硝基化合物,得到了明显的分子离子峰,并由碎片峰提供结构信息。
- The 1 - Nand 2 - N tautomers can be distinguished conveniently from whether the ion peaks of [ M - 29 ] + and [M -57]+ are rich or not. 根据其MS谱图中[M-29]~+及[M-57]~+峰的强度;可以方便地区分1-N和2-N烷基化产物.
- The results show the EIMS and CIMS of this type compound all have many ion peaks produced through skeleton rearrangements. 结果表明,无论是EIMS,还是CIMS均存在较多的骨架重排离子峰;
- Many mountaineers have reached that mountain peak. 许多登山家都登上过那座大山的顶峰。
- We have a precipitous climb to the peak. 我们向着陡峭山顶攀登。
- Besides the presence of other ions peaks,all the mass spectra of these antibiotics showed a characteristic ion peak at m/z 163.1 belonging to the protonated ion of 2-deoxystreptamine. 除其它特征碎片离子峰外;所有测试样品的质谱图中都存在质荷比为163.;1的归属于2-脱氧链霉胺的碎片离子峰。
- Keywords trilfuromethyl-imidazole;HRMS;metastable ions; 三氟甲基咪唑;高分辨质谱;亚稳跃迁;
- Tourism is at its peak in August. 旅游业在八月份达到高峰。
- The climbers made camp half-way up the peak. 登山队员在半山腰扎营。
- Traffic is very heavy at peak hours. 在高峰时间交通非常拥挤。
- Beat the egg whites until they peak. 把蛋白打到他们耸起。
- metastable ion 亚稳定离子,亚稳离子
- Traffic reaches a peak between 8 and 9 in the morning. 早晨八九点钟是交通的高峰时刻。
- The mountain peak loomed through the fog. 那座山峰在雾中隐隐出现。
- We sailed from Perth with a cargo of raw ion. 我们装着一船生铁从佩思启航。
