Ionization of pesticides using a far-ultraviolet femtosecond laser in gas chromatography/time-of-flight mass spectrometry

被引：13
|
作者：
Hashiguchi, Yuichi [1 ]
Zaitsu, Shin-ichi [1 ]
Imasaka, Totaro [1 ,2 ]
机构：
[1] Kyushu Univ, Grad Sch Engn, Dept Appl Chem, Nishi Ku, Fukuoka 8190395, Japan
[2] Kyushu Univ, Div Optoelect & Photon, Ctr Future Chem, Nishi Ku, Fukuoka 8190395, Japan
来源：
ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2013年 / 405卷 / 22期
基金：
日本学术振兴会;
关键词：
Gas chromatography; Laser ionization; Mass spectrometry; Femtosecond laser; Far-ultraviolet laser; Pesticide; ON-SITE ANALYSIS; AROMATIC-HYDROCARBONS; DIOXIN;
D O I：
10.1007/s00216-013-6976-0
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
The fourth harmonic emission (200 nm) of a femtosecond Ti:sapphire laser (35 fs) was generated and used in the multiphoton ionization of 49 pesticides in gas chromatography/time-of-flight mass spectrometry. The limit of detection was improved when the ionization source from the third harmonic emission (267 nm) was replaced with the fourth harmonic emission for several pesticide molecules that contained no conjugated double bonds since their absorption bands are located in the far-ultraviolet region. This analytical instrument was used in the analysis of a series of real samples including potatoes, carrots, and cabbage, and a signal suspected to arise from di-allate was observed for the potato sample.
引用
收藏
页码：7053 / 7059
页数：7
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