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Title: Chromatography of heavy metal cations with formic acid containing mobile phases: Effect of added organic solvents and surfactants on the mobility of cations
Authors: Mohammad, Ali
Sirwal, Yasir Hamid
Keywords: Formic acid
heavy metal cations
Issue Date: Sep-2004
Publisher: CSIR
IPC CodeB01 D 15/08
Abstract: Chromatography of fifteen metal ions has been performed on silica gel high-performance thin-layer chromatographic plates with mobile phase systems containing formic acid. The effect of protic and aprotic organic modifiers (methanol, ethanol, acetone, acetonitrile, DMSO, and dioxane) and surfactants (SDS, CTAB or Triton X-100) concentrations below and above the critical micellar concentration (CMC) on the retention behaviour of the metal cations was examined. A novel mobile phase system comprising of 1.0 M HCOOH and 1.0 M HCOONa in volume ratio of 7:3 was identified as the best mobile phase for rapid separation and identification of mixtures of Ni2+, Cd2+ and Ag+. The lower limit of detection for Cu2+, Ni2+, Co2+ and Pb2+ on HPTLC was determined and semiquantitative determination of Ni2+, Pb2+, Tl+ and Fe3+ by spot-area measurement was attempted. The proposed method was successfully applied for identification and separation of nickel, cadmium, and silver from river and industrial wastewater as well as from hydroxide sludge samples.
Page(s): 726-731
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.11(5) [September 2004]

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