caa a22 4500 445880082 CHVBK 20180317145540.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00604-011-0677-1 doi (NATIONALLICENCE)springer-10.1007/s00604-011-0677-1 Determination of trace silver in environmental samples by room temperature ionic liquid-based preconcentration and flame atomic absorption spectrometry [Elektronische Daten] [Chun-Gang Yuan, Ping Liang, Yang-Yang Zhang] We report on a new method for preconcentration of silver ion at trace level in environmental samples, and its subsequent determination by flame atomic absorption spectrometry (FAAS). The room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium hexafuorophosphate and the chelator 5-(4-dimethylaminobenzylidene)-rhodanine were used for extraction. Ag(I) was back-extracted from the organic phase into thiosulfate solution and then determined via FAAS. The effects of pH, concentration of chelating agent, extraction time and temperature, amounts of ionic liquid, ionic strength and potentially interfering ions were studied. Under optimized conditions, the enhancement factor is 30 was achieved. The detection limit (3σ) is 0.28ngmL−1, and the relative standard deviation is 4.1% for 7 replicate determinations at 5ngmL−1 of Ag(I). The method was validated by analysis of certified reference materials and applied to the determination of Ag(I) in environmental samples with satisfactory results. Graphical abstract Silver ions at trace level in environmental samples were chelated by 5-(4-dimethylaminobenzylidene)-rhodanine and preconcentrated by room temperature ionic liquid. After back-extraction, silver was determined by flame atomic absorption spectrometry sensitively. Springer-Verlag, 2011 Ionic liquid nationallicence Silver nationallicence Preconcentration nationallicence Atomic absorption spectrometry nationallicence Yuan Chun-Gang School of Environmental Science & Engineering, North China Electric Power University, 071003, Baoding, Hebei Province, People's Republic of China aut Liang Ping School of Environmental Science & Engineering, North China Electric Power University, 071003, Baoding, Hebei Province, People's Republic of China aut Zhang Yang-Yang School of Environmental Science & Engineering, North China Electric Power University, 071003, Baoding, Hebei Province, People's Republic of China aut Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 333-339 0026-3672 175:3-4<333 2011 175 604 https://doi.org/10.1007/s00604-011-0677-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-011-0677-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yuan Chun-Gang School of Environmental Science & Engineering, North China Electric Power University, 071003, Baoding, Hebei Province, People's Republic of China aut NATIONALLICENCE 700 1- Liang Ping School of Environmental Science & Engineering, North China Electric Power University, 071003, Baoding, Hebei Province, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Yang-Yang School of Environmental Science & Engineering, North China Electric Power University, 071003, Baoding, Hebei Province, People's Republic of China aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 175/3-4(2011-12-01), 333-339 0026-3672 175:3-4<333 2011 175 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer