Solid-phase extraction method for preconcentrationl separation of zinc ion in tap water and human urine using organo-bentonite modified by dithizone
A new method was proposed for the preconcentration/separation of zinc at trace levels using a modified organo-bentonite with dithizone (D-O-bentonite) and determined by flame atomic absorption spectrometry (FAAS).The influences of some experimental parameters including pH of the sample solution,contact time,and volume of eluent have been investigated.The influences of some matrix elements were also examined.The results show that the zinc ion could be adsorbed on the D-O-bentonite.The adsorbed quantitively was affected by the pH value of medium and contact time.In the medium of pH 4-5,the contact time was 20 min,and capacity of adsorption was 32.0 mg.g1.The zinc adsorbed on the sorbent could be completely eluated by using 0.5 mol·L-l HNO3.The method has a good tolerance to matrix interference.The detection limit of the method for zinc ion was 0.013 μg·L-1.The method was successfully applied to the pre-concentration/separation of zinc ion in the tap water and human urine with satisfactory results.
dithizone bentonite zinc preconcentration tap water human urine flame atomic absorption spectrometry
Dong Zhang Yanli Zhang
School of Environmental and Chemical Engineering Shenyang Ligong University, Shenyang 110159, China School of Foreign Languages, Shenyang Ligong University, Shenyang 110159, China
国际会议
重庆
英文
892-895
2011-06-23（万方平台首次上网日期，不代表论文的发表时间）