1,4氧氮杂萘2酮类衍生物的电子轰击质谱分析
电子轰击质谱,1,4氧氮杂萘2酮系列衍生物,裂解规律,,电子轰击质谱，,1，4氧氮杂萘2酮系列衍生物，,裂解规律,1引言,2实验部
1(北京防化研究院， 北京 100083)2(北京大学化学与分子工程学院， 北京 100871)
摘 要 用电子轰击质谱(EIMS)研究了1，4氧氮杂萘2酮系列衍生物，分析并探讨了不同取代基对这类化合物EIMS谱图的影响，分析得到一些裂解规律。
关键词 电子轰击质谱， 1，4氧氮杂萘2酮系列衍生物， 裂解规律
Simultaneous Determination of Trace As and Sb in Tobacco Samples by Opposite Spray Hydride Generation Atomic Fluorescence Spectrometry
Zhang Xiaowei, Zhang Zhaoxiang, Song Qi, Yang Yueying, Gao Liyan, Mo Zhengbo, Liu Ping
1(College of Science, Qingdao Technological University, Qingdao 266033)
2(College of Chemistry, Qingdao University of Science & Technology, Qingdao 266042)
Abstract A highly sensitive and simple method was developed for the simultaneous determination of trace As and Sb in tobacco samples by opposite spray atomic fluorescence spectrometry. The sample and KBH4 solutions sprayed oppositely in a highly speed and reacted to generate hydrides in the nearnebulous phase. The detection sensitivity was enhanced by a factor of 15 compared with the normally hydride generation atomic fluorescence spectrometry. The tolerance to the interference of coexisting ions was carefully examined. Under optimal conditions, the detection limits (3 s) were evaluated to be 6.3 ng/L for As and 19.2 ng/L for for Sb, respectively. The relative standard deviations for 10 replicate determinations of 1 μg/L As and Sb were 3.2% and 18%, respectively. The linear range were 0.019-3.2 μg/L for As and 0.058-9.6 μg/L for Sb. The proposed method was successfully applied to the simultaneous determination of As and Sb in tobacco leaf samples. ......
您现在查看是摘要页，全文长 6721 字符。