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- W2359786924 abstract "A method of dispersive liquid – liquid microextraction prior continuum source-graphite furnace atomic absorption spectrometry was used to determine trace chromium(Ⅵ) in environmental samples with ammonium pyrrolidine dithiocarbamate( APDC) as chelating agents,CCl4 as an extraction solvent and ethanol as a dispersant,and the factors( pH,extraction time,temperature and salinity,etc.) have been discussed. The results showed that the optimum conditions for the extraction of 5 mL of samples was as follows: pH were 2. 0,temperature was 35 ℃ and the volumes of chelating,extraction agent and dispersants was 0. 012 g /L,30 μL and0. 5 mL respectively. Under the optimum conditions,The detection limit of chromium(Ⅵ) in water samples was0. 005 μg /L and the linear range was 0. 05 ~ 2. 00 μg /L. The relative standard deviation were 0. 3% and 2. 4%when the concentrations of 0. 20 μg /L and 1. 00 μg /L Cr(Ⅵ) standard solutions were measured 10 times," @default.
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- W2359786924 date "2014-01-01" @default.
- W2359786924 modified "2023-09-23" @default.
- W2359786924 title "Determination of trace chromium (VI) by dispersive liquid-liquid microextraction combined with continuum source-graphite furnace atomic absorption spectrometry" @default.
- W2359786924 hasPublicationYear "2014" @default.
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