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• W2079401947 abstract "A simple, sensitive and inexpensive flow injection solid phase extraction (SPE) system was developed for automatic determination of trace level concentrations of metals. The potentials of this novel scheme, coupled to flame atomic absorption spectrometry (FAAS), were demonstrated for trace cadmium and lead determination in environmental water samples. The method was based on on-line chelate complex formation of target species with ammonium diethyldithiophosphate (DDTP), retention onto the surface of reversed-phase poly(divinylbenzene-N-vinylpyrrolidone) co-polymeric beads (Oasis HLB) and elution with methanol prior to atomization. A special PVC adapter was designed for easy and rapid replacement of the commercially available SPE cartridge. All main chemical and hydrodynamic parameters affecting the complex formation, sorption and elution of the analyte were optimized thoroughly. Moreover, the effect of potential interfering species occurring in environmental samples was also explored. For 90 s preconcentration time, enhancement factors of 155 and 180, detection limits (3s) of 0.09 μg L− 1 and 0.9 μg L− 1 and relative standard deviations (R.S.D.) of 2.9% (at 4.0 μg L− 1) and 2.6% (at 20.0 μg L− 1) were obtained for cadmium and lead, respectively, with a sample throughput of 24 h− 1. The measurement trueness of the developed method was evaluated by analyzing a certified reference material and spiked environmental water samples. The proposed method is well suited to detect the target elements at concentration levels below the maximum allowed concentrations endorsed by the European Framework Directive (2008/105/EC) in inland and coastal waters." @default.
• W2079401947 created "2016-06-24" @default.
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• W2079401947 date "2011-05-01" @default.
• W2079401947 modified "2023-10-18" @default.
• W2079401947 title "On-line sorptive preconcentration platform incorporating a readily exchangeable Oasis HLB extraction micro-cartridge for trace cadmium and lead determination by flow injection–flame atomic absorption spectrometry" @default.
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• W2079401947 doi "https://doi.org/10.1016/j.microc.2010.11.007" @default.
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