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    • 1. 发明专利
    • Method of analyzing mass
    • 分析方法
    • JP2006284371A
    • 2006-10-19
    • JP2005104885
    • 2005-03-31
    • Shimadzu Corp株式会社島津製作所
    • KAWANA SHUICHI
    • G01N27/62G01N30/72
    • G01N30/7206G01N30/8672G01N2030/8435
    • PROBLEM TO BE SOLVED: To solve the problem that negative chemical ionization has high selectivity and has been spread as a measuring method of high sensitivity in GC/MS at the present time but, since data is little with respect to a mass spectrum acquired by a negative chemical ionization method, it is desirable to use the holding time or holding index of chromatography in identification but the holding index can not be used in the negative chemical ionization method, a standard substance must be prepared necessarily and the holding time must be measured. SOLUTION: Fatty acids different in the number of carbon atoms are converted to derivatives by a deriving reagent to be set as "a reference substance for NCI". The holding time of "the reference substance for NCI" and the holding times of respective components are calculated under the same condition to set "a holding index for NCI". If "the holding index for NCI" is utilized, the holding time is corrected even if the standard substance is not measured. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:为了解决目前负GC化学电离具有高选择性并作为GC / MS高灵敏度测量方法的问题,但由于数据相对于质谱很小 通过负电化学电离法获得,希望使用色谱的保留时间或保持指数进行鉴定,但保持指数不能用于负电化学电离法,必须准备标准物质,保存时间必须 被测量。 解决方案:通过衍生试剂将碳原子数不同的脂肪酸转化为衍生物,将其设定为“NCI的参考物质”。 在相同条件下计算“NCI的参考物质”的保存时间和各成分的保持时间,以设定“NCI的保持指数”。 如果使用“NCI的保持指数”,即使未测量标准物质,也保持保持时间。 版权所有(C)2007,JPO&INPIT