用自发拉曼光谱和气体染色学分析C4F7N绝缘气体混合物的痕迹分析
Jaspreet Singh1, Dawson Dodd2, Theresa Evans-Nguyen2
1Physics Department, University of South Florida, Tampa, Florida 33620, United States.
ACS omega
|May 13, 2024
概括
研究人员评估了气体染色体质谱法 (GC-MS) 和自发拉曼光谱法 (SRS) 来检测2,3,3,3-四二二三甲基 (C4F7N) 中的杂质. 在气体绝缘开关设备中,SRS显示出可移植现场诊断的前景.
科学领域:
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
背景情况:
- 2,3,3,3-四二三甲基) 甲 (C4F7N) 是气体绝缘开关装置中硫六化物 (SF6) 的潜在替代品.
- 准确量化C4F7N中微量杂质对于其应用和安全至关重要.
- 像GC-MS这样的现有方法在检测某些气体和便携性方面存在局限性.
研究的目的:
- 评估气色谱-质谱法 (GC-MS) 和自发拉曼光谱法 (SRS) 在C4F7N.中微量污染物量化的有效性.
- 为了识别和量化C4F7N及其副产品中的杂质.
- 评估SRS在气体隔离开关装置诊断领域的应用潜力.
主要方法:
- 独立评估GC-MS和一个新的反辅助多通道腔 SRS.
- 14种不同的气体的识别和量化.
- 使用SRS的CH4的检测极限为7.4ppm,使用GC-MS的C3F6的检测极限为20ppm.
主要成果:
- 无论是GC-MS还是SRS都成功地识别和量化了微量杂质.
- GC-MS检测到高达500 ppm的CF4,而SRS检测到CF4在465 ppm和C2F6在100 ppm.
- SRS展示了检测数百ppm上限的各种分析物的潜力,并显示了可移植性的承诺.
结论:
- 对于选择性检测,GC-MS是有效的,但需要多个检测器.
- 在C4F7N中,SRS是微量杂质分析的可行的替代方案,有可能在现场部署.
- 在气体绝缘开关设备中,SRS为便携式诊断提供了一个有前途的途径.
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