Transcription of Application - Young In
1 AuthorWenmin LiuAgilent Technologies, Ying Lun RoadWaigaoqiao Free Trade ZoneShanghai 200131 ChinaAbstract An SF6purity analysis method is developed in this appli-cation. PLOT Q and GasPro columns are suitable for theanalysis of contaminantes in SF6. On the GasPro channel,sulfur compounds are detected and the total analysis timeis less than 2 breakers operate to switch electric circuits and equipment in and out of the circuit breakers are filled with compressedsulfur-hexafluoride gas, which is a dielectric usedin high-voltage electrical equipment as an insulatorand/or arc-quenching medium; the gas also inter-rupts the current flow when the contacts are is expensive and has been designated as agreenhouse gas by the reliable field method is important to assesswhether reclaimed SF6is acceptable for continueduse as in-service gas in high-voltage equipment,thus preventing failures, extending equipment life,reducing maintenance costs, and increasing per-sonnel Analysis by Micro GCApplication In this Application , a method based on the Agilent3000 Micro GC was developed to accurately deter-mine concentrations of impurities and decomposi-tion products in SF6to ensure reliable operation ofelectrical equipment.
2 ExperimentalAn Agilent 3000 Micro GC with two-channel con-figuration: PLOT Q (8 m mm) and GasPro(10 m mm) was SF6sample was provided by Hebei ElectricPower Research chromatographic conditions for the two channels are shown in Table ChemicalTable Conditions of Micro GCChannel PLOT Q GasProSample inlet temperature ( C)8080 Injector temperature ( C)8080 Column temperature ( C)6060 Inject time (ms)100100 Column pressure (psi)2020 ResultsThe PLOT Q channel and the GasPro channel are both suitable for the purity analysis of SF6. Figures 1a and 1b show the chromatogramsobtained from these two columns .
3 Figure 1c is azoomed-out window of Figure 1b from the timerange of to minutes. An unknown sulfurAgilent shall not be liable for errors contained herein or for incidental or consequentialdamages in connection with the furnishing, performance, or use of this , descriptions, and specifications in this publication are subject to changewithout notice. Agilent Technologies, Inc. 2007 Printed in the USAS eptember 21, More InformationFor more information on our products and services,visit our Web site at is detected in the GasPro channel. Thetotal analysis time is less than 2 minutes, providingexcellent cycle time. The peak area repeatabilities(shown by RSD, n = 6) of these two channels areshown in Table 2. The detection limits of thismethod are approximately 20 ppm, which meets theuser requirement for contaminant analysis in Repeatabilities of Two ChannelsAirCF4SF6CO2 RSD (n = 5)(%)(%)(%)(%)PLOT compoundAir CF4 Figure in PLOT Q (a) and GasPro (b and c) channels.
