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• W4210303134 abstract "In this work, a novel preconcentration method was developed for As, Sb and Bi following trapping of their volatile hydride derivatives onto cellulose-based platforms modified with Ag nanoparticles for ultrasensitive determination by inductively-coupled plasma mass spectrometry (ICP-MS). A continuous flow hydride generation system was coupled to a gas-liquid separation unit integrated with the preconcentration platform. AsH3, SbH3 and BiH3 were retained onto the silver nanoparticles (AgNPs) modified cellulose substrate upon catalytic decomposition. After a 10 min preconcentration time, enrichment factors of 16, 9 and 26 for As, Sb and Bi were obtained, respectively. These values can be increased when needed by a factor of three applying a preconcentration time of 30 min. Elution of analytes trapped onto AgNPs with 0.1 M HNO3 (As, Sb) or 1 M HNO3 (Bi) was performed and metal content in the eluates was measured by ICP-MS. Detection limits of 15, 2 and 1 ng/L for As, Sb and Bi were obtained, respectively. Repeatability values expressed as relative standard deviation (%) was in the range of 1.2–2.7%. Other hydrides tried (i.e. SeH2 and TeH2) did not provide suitable performance owing to inefficient desorption from the cellulose substrate. Simulated water matrices mimicking the major composition of freshwater, seawater, wastewater and groundwater were analyzed, recoveries being in the range of 80–106%." @default.
• W4210303134 created "2022-02-08" @default.
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• W4210303134 date "2022-03-01" @default.
• W4210303134 modified "2023-10-14" @default.
• W4210303134 title "Dynamic thin-film microextraction method using cellulose platforms modified with silver nanoparticles for preconcentration of volatile hydride-forming elements prior to inductively-coupled plasma mass spectrometry determination" @default.
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• W4210303134 doi "https://doi.org/10.1016/j.sab.2022.106373" @default.
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