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Water‐in‐oil microemulsion as mobile phase in thin‐layer chromatographic retention studies of anions
Author(s) -
Mohammad Ali,
Tiwari Sharad,
Chahar Jay Pal Singh,
Kumar Sanjeev
Publication year - 1995
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02577849
Subject(s) - chemistry , microemulsion , microcrystalline cellulose , phase (matter) , chromatography , dilution , heptane , silica gel , cellulose , sodium , analytical chemistry (journal) , pulmonary surfactant , organic chemistry , biochemistry , physics , thermodynamics
Abstract A water‐in‐oil (W/O) microemulsion, consisting of sodium dodecyl sulphate (SDS)/1‐pentanol/water/heptane, has been used as mobile phase for the separation of inorganic anions from their binary mixtures, for example, IO 4 − ‐NO 2 − , IO 4 − ‐BrO 3 − , IO 4 − ‐I − , MnO 4 − ‐BrO 3 − , MnO 4 − ‐NO 2 − , and MnO 4 − ‐Br − . The weight ratio, SDS/ n ‐pentanol was kept constant at 1/2.46 for all compositions. The retention efficiency of anions on layers of silica gel G, alumina, microcrystalline cellulose, kieselguhr G, and mixtures of kieselguhr and cellulose in 4:1 and 3:2 ratios has been examined with the W/O microemulsion system as a mobile phase. Thin layers of kieselguhr were most useful for differential migration of anions. Quantitative separation of IO 4 − from accompanying ions, limits of identification, and dilution of few anions are reported. The effects of amines, phenols, and heavy metals on the separation efficacy of IO 4 − also have been investigated.