Daorattanachai Pornlada, Unob Fuangfa, Imyim Apichat
Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
Talanta. 2005 Jul 15;67(1):59-64. doi: 10.1016/j.talanta.2005.02.006. Epub 2005 Feb 26.
Ammonium pyrrolidinedithiocarbamate impregnated activated carbon (APDC-AC) has been used for the preconcentration of Cd(II), Cu(II), Ni(II), and Zn(II) from aqueous solution by column solid phase extraction (SPE) technique. Trace metal ions in aqueous solution were quantitatively sorbed onto APDC-AC packed in a SPE column at pH 5.0 with a flow rate of 1.0mLmin(-1). The sorbed metals were eluted with 1M nitric acid in acetone solution at a flow rate of 0.6mLmin(-1) and analyzed by flame atomic absorption spectrometry. The effects of sample volume, amount of APDC-AC, volume of eluent and ionic strength of working solution on metal ion recovery have been investigated. The present methodology gave recoveries from 90 to 106% and R.S.D. from 0.6 to 5.5%.
吡咯烷二硫代氨基甲酸铵浸渍活性炭（APDC - AC）已用于通过柱固相萃取（SPE）技术对水溶液中的Cd(II)、Cu(II)、Ni(II)和Zn(II)进行预富集。水溶液中的痕量金属离子在pH 5.0、流速为1.0mLmin⁻¹的条件下定量吸附到填充在SPE柱中的APDC - AC上。吸附的金属用1M硝酸的丙酮溶液以0.6mLmin⁻¹的流速洗脱，并用火焰原子吸收光谱法进行分析。研究了样品体积、APDC - AC用量、洗脱剂体积和工作溶液离子强度对金属离子回收率的影响。本方法的回收率为90%至106%，相对标准偏差为0.6%至5.5%。
