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요약정보
低频率射频辉光放电的研究 / Study on Low Frequency Radio Frequency Glow Discharge
Resource Type
Academic Journal
Authors
郭长娟
;
胡帆
;
胡春燕
;
朱辉
;
GUO Chang-juan
;
HU Fan
;
HU Chun-yan
;
ZHU Hui
Source
质谱学报 / Journal of Chinese Mass Spectrometry Society
. 42(6):1156-1164
Subject
低频率;射频;辉光放电(GD);飞行时间质谱(TOF MS)
Language
Chinese
ISSN
1004-2997
Online Access
Scopus
Find it @ DONGA
초록
辉光放电电离源可用来检测固态、液态及气态样品,目前主要用于无机固体样品的元素分析和定量检测.本研究将低频率射频辉光放电(Lf-RFGD)与飞行时间质谱仪(TOF MS)联用用于分析液体和气体样品.研究了电离腔真空度、进样管尺寸、辅助气压力、放电频率及电极板压差对电离效率的影响.最优分析条件为:电离腔真空度约30 Pa,进样管长150 mm、内径0.25 mm,辅助气压强约1.0 M Pa,放电频率2 M Hz,电极板压差约100 V.在此条件下,放电功率约20 W,对液体样品的检出限约0.1 pg、对挥发性样品的检出限约20 mg/m3,检测半峰分辨率约3000(FWHM).将Lf-RFGD TOF MS应用于实际药品溶液和挥发性有机物(VOCs)的检测.本仪器对药品溶液的检测灵敏度与常用检测仪器相比无优势,但对挥发性有机物的检测效果较好,为开发低成本的VOCs检测仪器提供了有吸引力的选择.
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