期刊
ANALYTICAL CHEMISTRY
卷 87, 期 2, 页码 1366-1372出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac5042457
关键词
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资金
- Natural Science Foundation of China [21475018, 21235001]
- National Science & Technology Pillar Program [2012BAF14B09]
- Program of New Century Excellent Talents in University [NCET-13-0114]
- Scientific Research Fund of Liaoning Education Department [L2013107]
- Fundamental Research Funds for the Central Universities [N120505004, N110805001, N110705002]
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 5100 mu g L-1 along with a detection limit of 1.3 mu g L-1 and a precision of 2.4% RSD at 50 mu g L-1. The present DBD-OES system is validated by nickel in certified reference materials.
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