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Summary Hydraulic high pressure nebulization is used as an effective way of on-line coupling of HPLC to flame-AAS for speciation of
metal compounds in the ng range. Compared to coupling with a conventional nebulizer a signal enhancement by a factor of 7.5
(peak height) and 10.1 (peak area) for copper is obtained. Using an injected volume of 50 μL the detection limits for Cu,
Fe, Ni and Cd are below 0.1 μg/mL (=5ng) and for Mg below 0.01 μg/mL (=0.5ng). The effects of HPLC flow-rate and nebulization
nozzle diameter on the signal peak height have been investigated. The performance of the system is demonstrated using speciation
of iron. A base-line separation of Fe(II) and Fe(III) is achieved within two minutes. Also species changes (Fe acetate to
Fe citrate) can be analysed using the proposed system. 相似文献
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顾春华 《分析测试技术与仪器》2009,15(3):191-193
采用干灰化法、湿氧化A法和B法分别对油画颜料进行消解后用原子吸收火焰法测定其中的铅含量.通过分析比较3种消解方法测定的结果,发现采用湿氧化法优于干灰化法,湿氧化A法优于B法.采用湿氧化A法对油画颜料进行加标处理后,加标回收率在90%-105%范围,表明采用该方法测定油画颜料中的铅含量是可信的. 相似文献
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