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Separation of Ions from Volatile Organic Compounds Using High-Field Asymmetric Waveform Ion Mobility Spectrometry-Mass Spectrometer
Hua Li,Xiao-hao Wang,Fei Tang*,Ji Yang,Li Ding
Author NameAffiliationE-mail
Hua Li Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China  
Xiao-hao Wang Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China  
Fei Tang* Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China tangf@mail.tsinghua.edu.cn 
Ji Yang School of Electronics and Computer Science and Technology, North University of China, Taiyuan 030051, China  
Li Ding Shimadzu Research Laboratory (Shanghai) Co., Ltd., Shanghai 201201, China  
Abstract:
A combination of high-field asymmetric waveform ion mobility spectrometry (FAIMS) with mass spectrometer (MS) was analyzed. FAIMS separates ions from the volatile organic compounds in the gas-phase as an ion-filter for MS. The sample ions were created at ambient pressure by ion source, which was equipped with a 10.6 eV UV discharge lamp (λ=116.5 nm).The drift tube of FAIMS is composed of two parallel planar electrodes and the dimension is 10 mm×8 mm×0.5 mm. FAIMS was investigated when driven by the high-filed rectangular asymmetric waveform with the peak-to-peak voltage of 1.36 kV at the frequency of 1 MHz and the duty cycle of 30%. The acetone, the butanone, and their mixture were adopted to characterize the FAIMS-MS. The mass spectra obtained from MS illustrate that there are ion-molecular reactions between the ions and the sample neutral molecular. And the proton transfer behavior in the mixture of the acetone and the butanone is also observed.With the compensation voltage tuned from -30 V to 10 V with a step size of 0.1 V, the ion pre-separation before MS is realized.
Key words:  High-field asymmetric waveform ion mobility spectrometry, Mass spectrom-eter, Ion-filter, Ion-molecular reaction, Proton transfer
FundProject:
Separation of Ions from Volatile Organic Compounds Using High-Field Asymmetric Waveform Ion Mobility Spectrometry-Mass Spectrometer
李华,王晓浩,唐飞*,杨吉,丁力
摘要:
对高场非对称波形离子迁移谱-质谱联用(FAIMS-MS)进行了分析. FAIMS将离子从气态的挥发性有机化合物中分离出来. 采用真空紫外灯离子源在常压下对样品进行电离,紫外灯发射的光子能量为10.6 eV,波长116.5 nm. 迁移区由两块平行的金属平板电极构成,尺寸为10 mm×8 mm ×0.5 mm. 采用频率1 MHz、电压峰值1.36 kV、占空比30%的高场非对称方波电压,对丙酮、丁酮和两者混合物进行FAIMS-MS实验. 质谱结果表明,离子和中性分子之间存在分子离子反应,同时在丙酮和丁酮的混合物中有质子转移. 调节补偿电压从-30~10 V以0.1 V的步长扫描,实现了在质谱仪之前进行离子分离的功能.
关键词:  高场非对称波形离子迁移谱,质谱仪,离子过滤器,分子离子反应,质子转移
DOI:10.1088/1674-0068/23/02/125-132
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