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- W2033694604 abstract "Chromatographic nitrogen isotope separation was experimentally studied in a break through manner. A solution of 0.4 mol.dm-3 NH4C1 in methanol was continuously fed at 0.12, 0.25 and 0.50 cm3.min-1 into a glass tube packed with cryptand(2B,2,1) polymer. The temperature of column was kept constant at 293 K by passing temperature-controlled water through a jacket. Nitrogen gas was generated from the effluent reacted with Ca(ClO)2 solution after removing methanol by vacuum distillation, and the ratio of 14N15N to 14N14N was measured with a mass spectrometer (Finnigan MAT252). NH4Cl concentrations in the samples were gravimetrically determined. An enrichment factor, which is defined as an equilibrium separation factor minus unity was determined to be 0.0025±0.0013. A HETP (height equivalent to a theoretical plate) was evaluated 0.5±0.2cm at 14cm-h-1. This is the first report on nitrogen isotope separation with cryptand polymer." @default.
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- W2033694604 date "2002-04-01" @default.
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- W2033694604 title "Nitrogen Isotope Separation with Displacement Chromatography Using Cryptand Polymer" @default.
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- W2033694604 doi "https://doi.org/10.1080/18811248.2002.9715220" @default.
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