![]() ![]() Highly Sensitive Determination of Arsenic and Antimony Based on an Interrupted Gas Flow Atmospheric Pressure Glow Discharge Excitation Source. Chan, Dong He, Zhifu Liu, Qisi Deng, Hongtao Zheng, Shenghong Hu, Zhenli Zhu. This article is cited by 128 publications. Future use of the detector chip in conventional gas chromatography or as an integrated detector in on-chip gas chromatography is discussed. Operation is stable and instrumental requirements are simple. The device was operated for more than 24 h without a significant change in performance. This is mainly attributed to dead volumes and chromatographic processes introduced by the connecting tubing and the chip glass channels. The detector signal shows a marked peak broadening and tailing when compared with the signal of a flame ionization detector. For hexane, the detector has a linear dynamic range of over two decades and a minimum detectability of 10 -12 g s -1 (800 ppb). A number of carbon-containing compounds are detected in the column effluent by recording the emission at 519 nm. Applied power is 9 mW (770 V, 12 μA) and helium flow rate 320 nL s -1. The device employs a 180-nL plasma chamber in which an atmospheric pressure dc glow discharge is generated in helium. A micromachined plasma chip is coupled to a conventional gas chromatograph to investigate its performance as an optical emission detector. ![]()
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