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Modified Activated Carbon as Solid Phase Extraction Adsorbent for the Preconcentration and Determination of Trace As(Ⅲ) in Environmental Samples by Graphite Furnace Atomic Absorption Spectrometry 被引量:1
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作者 tavakkoli,nahid Habibollahi,Saeed Amini Tehrani,Shahla 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2012年第3期665-669,共5页
A simple and selective method was developed for the preconcentration, separation, and determination of trace amounts of As(Ⅲ) in an aqueous solution by solid phase extraction combined with graphite furnace atomic a... A simple and selective method was developed for the preconcentration, separation, and determination of trace amounts of As(Ⅲ) in an aqueous solution by solid phase extraction combined with graphite furnace atomic absorption spectrometry. Activated carbon (AC) was modified by sodium diethyldithiocarbamate (NaDDTC) and then used as a new, stable and easily prepared solid sorbent in a mini column for the extraction of As(Ⅲ) in aqueous solution. Factors influencing the sorption and desorption of As(Ⅲ), such as volume and concentration of eluent, sam- ple pH, flow rate and effect of interfering ions on the recovery of As(Ⅲ) have been systemically investigated. At pH 2.0 As(Ⅲ) could be adsorbed quantitatively by NaDDTC-AC, and then eluted completely with 2 mL of 3.0 moloL 1 HNO3. The amount of eluted As(Ⅲ) was measured using graphite furnace atomic absorption spectrometry. The detection limit of As(Ⅲ) was 0.04 ng·mL-1 with enrichment factor of 100 and the relative standard deviation (RSD, n=8) was 1.58% at 10 ng·mL-1 level. 展开更多
关键词 activated carbon PRECONCENTRATION ARSENIC solid phase extraction adsorption graphite furnace atomicabsorption spectrometry
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