Dark Energy as Evidence for Extra Dimensions by Milton, Kimball A

By Milton, Kimball A

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Consequently, for functional homopolymers being distributed in functionality and molar mass, coupled LCCC vs. SEC can yield combined information on FTD and MMD. This type of dual information is of significant importance, for example, for the quality control of amphiphilic polyalkylene oxides. 34 Harald Pasch Fig. 20. LC-CC separation of octylphenoxy-terminated poly(ethylene oxide), stationary phase: Nucleosil RP-18, eluent: methanol/water 86:14 (v/v) (from [119] with permission) The analysis of an octylphenoxy-terminated PEO with respect to FTD and MMD has been demonstrated by Adrian et al.

Figure 26 represents the contour plot of the 2D separation of the block copolymer in the sequence LC-CC vs. SEC. The separation with respect to the PO block length is now obtained along the ordinate, while the abscissa reflects the differences in total molar mass. As can be seen, the total molar mass of the fractions increases with the length of the PO block. As the molar mass of the PO block is known for each fraction, the molar mass of the EO blocks can be calculated from the total molar mass [119].

The effluent of the liquid chromatography column is split, with a fraction (frequently 10% of the total effluent) going into the heated nebulizer nozzle located above a rotating sample collection disc. The nozzle rapidly evaporates the mobile phase while depositing a tightly focused track of the solute. When a chromatogram has been collected on the sample collector disc, the disc is transferred to the optics module in the FTIR spectrometer for analysis of the deposited sample track. A con- Fig. 27.

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