title: Ambient-Temperature Trap/Release of Arsenic by Dielectric Barrier Discharge and Its Application to Ultratrace Arsenic Determination in Surface Water Followed by Atomic Fluorescence Spectrometry.
abstract: A novel dielectric barrier discharge reactor (DBDR) was utilized to trap/release arsenic coupled to hydride generation atomic fluorescence spectrometry (HG-AFS). On the DBD principle, the precise and accurate control of trap/release procedures was fulfilled at ambient temperature, and an analytical method was established for ultratrace arsenic in real samples. Moreover, the effects of voltage, oxygen, hydrogen, and water vapor on trapping and releasing arsenic by DBDR were investigated. For trapping, arsenic could be completely trapped in DBDR at 40 mL/min of O2 input mixed with 600 mL/min Ar carrier gas and 9.2 kV discharge potential; prior to release, the Ar carrier gas input should be changed from the upstream gas liquid separator (GLS) to the downstream GLS and kept for 180 s to eliminate possible water vapor interference; for arsenic release, O2 was replaced by 200 mL/min H2 and discharge potential was adjusted to 9.5 kV. Under optimized conditions, arsenic could be detected as low as 1.0 ng/L with an 8-fold enrichment factor; the linearity of calibration reached R(2) > 0.995 in the 0.05 μg/L-5 μg/L range. The mean spiked recoveries for tap, river, lake, and seawater samples were 98% to 103%; and the measured values of the CRMs including GSB-Z50004-200431, GBW08605, and GBW(E)080390 were in good agreement with the certified values. These findings proved the feasibility of DBDR as an arsenic preconcentration tool for atomic spectrometric instrumentation and arsenic recycling in industrial waste gas discharge.
authors.affiliation: Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture , Beijing 100081, China.
authors.forename: Xuefei
authors.initials: X
authors.lastname: Mao
authors.affiliation: Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture , Beijing 100081, China.
authors.forename: Yuehan
authors.initials: Y
authors.lastname: Qi
authors.affiliation: Beijing Titan Instruments Company, Limited , Beijing 100015, China.
authors.forename: Junwei
authors.initials: J
authors.lastname: Huang
authors.affiliation: Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture , Beijing 100081, China.|Beijing Titan Instruments Company, Limited , Beijing 100015, China.
authors.forename: Jixin
authors.initials: J
authors.lastname: Liu
authors.affiliation: Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture , 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, United States.
authors.forename: Guoying
authors.initials: G
authors.lastname: Chen
authors.affiliation: Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture , Beijing 100081, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Na
authors.affiliation: Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture , Beijing 100081, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.affiliation: Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture , Beijing 100081, China.
authors.forename: Yongzhong
authors.initials: Y
authors.lastname: Qian
mesh_terms: D001151:Arsenic / Q000032:analysis*; D004560:Electricity; D005618:Fresh Water / Q000737:chemistry*; D013054:Spectrophotometry, Atomic / Q000295:instrumentation; D013499:Surface Properties; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic