title: Metal carbonyl vapor generation coupled with dielectric barrier discharge to avoid plasma quench for optical emission spectrometry.
abstract: The scope of dielectric barrier discharge (DBD) microplasma as a radiation source for optical emission spectrometry (OES) is extended by nickel carbonyl vapor generation. We proved that metal carbonyl completely avoids the extinguishing of plasma, and it is much more suitable for matching the DBD excitation and OES detection with respect to significant DBD quenching by concomitant hydrogen when hydride generation is used. A concentric quartz UV reactor allows sample solution to flow through the central channel wherein to efficiently receive the uniformly distributed UV irradiation in the confined cylindrical space between the concentric tubes, which facilitates effective carbonyl generation in a nickel solution. The carbonyl is transferred into the DBD excitation chamber by an argon stream for nickel excitation, and the characteristic emission of nickel at 232.0 nm is detected by a charge-coupled device (CCD) spectrometer. A 1.0 mL sample solution results in a linear range of 5-100 μg L(-1) along with a detection limit of 1.3 μg L(-1) and a precision of 2.4% RSD at 50 μg L(-1). The present DBD-OES system is validated by nickel in certified reference materials.
authors.affiliation: Research Center for Analytical Sciences, and ‡Department of Chemistry , College of Sciences, Northeastern University , Box 332, Shenyang 110819, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Cai
authors.forename: Shao-Hua
authors.initials: SH
authors.lastname: Li
authors.forename: Shuai
authors.initials: S
authors.lastname: Dou
authors.forename: Yong-Liang
authors.initials: YL
authors.lastname: Yu
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Wang
mesh_terms: D001128:Argon / Q000032:analysis; D004784:Environmental Monitoring / Q000295:instrumentation; D004867:Equipment Design; D006197:Hair / Q000737:chemistry; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D057230:Limit of Detection; D009532:Nickel / Q000032:analysis*; D009942:Organometallic Compounds / Q000032:analysis*; D058626:Plasma Gases / Q000737:chemistry; D015203:Reproducibility of Results; D013054:Spectrophotometry, Atomic / Q000295:instrumentation*; D014835:Volatilization; D014867:Water / Q000032:analysis
chemical_list: D009942:Organometallic Compounds; D058626:Plasma Gases; D014867:Water; C005303:nickel carbonyl; D001128:Argon; D009532:Nickel; D006859:Hydrogen