中国科技论文在线-全讯担保网

despite increased interest in microplasma atomic spectrometry over the past several years, its applications to field analysis of real samples still remain limited due to its low sensitivity. in this work, headspace solid-phase microextraction (hs-spme) using pdms/dvb fiber was used as a sample introduction method to improve the sensitivity of a miniature (6.0 cm length 5.0 cm width 2.8 cm height) low power (<10 w) microplasma point discharge optical emission spectrometer (pd-oes) for the determination of hg and pb after their derivatization with sodium tetraethylborate (nabet4). owing to its advantages of combining sampling, separation and preconcentration of analytes from sample matrices into a single step, hs-spme not only simplifies sample pretreatment and the experimental setup, but also eliminates interferences from matrices and water vapor while significantly improving performance. compared to photochemical vapor generation pd-oes, limits of detection for hg and pb were enhanced by at least 100-fold, providing great potential for field analysis these