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Ueki, Yuji; Umemura, Tomonari*; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Katakai, Akio; Tamada, Masao
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 58, 2007/02
In late years, the studies on monolithic columns, which consist of porous material with through-pore of a few micrometer dimensions, have been vigorously performed for rapid and high-resolution separations. Monolithic capillary columns for reversed-phase liquid chromatography were directly prepared by 
ray-induced polymerization of hexyl methacrylate (HMA) and ethylene dimethacrylate in the fused silica capillaries, 0.25 mm in inner diameter. High separation efficiency of the monolithic columns were realized when the columns were prepared in the condition of 10 kGy irradaiation, total monomer concentration of 20% inclusive 25% crosslinker. The produced HMA-based monolithic columns were composed of adhered polymer particles, 1 
m and less than in diameter. The pressure drop of column, this 200 mm long, was below 2.0 MPa at linear velocity of 1 mm s
. The height equivalent to a theoretical plate was approximately 30 m for the five kinds of alkylbenzenes.
Ueki, Yuji*; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Umemura, Tomonari*; Katakai, Akio; Tamada, Masao
no journal, ,
The studies on monolith columns, which consist of polymer medium with through-pore (
m), have been vigorously performed to aim at rapid and high-resolution separation of organic materials. The monoliths are directly synthesized in fused silica capillaries by thermal polymerization. It is difficult to prepare the homogeneous monoliths by thermal polymerization, because of the heterogeneity of heat transfer and initiator dispersion. In the present paper, polymer monoliths were prepared by -rays irradiation. As a result, homogeneous monoliths, which composed of adhered particulate of polymer 1 m in diameter. The highest separation of the monolith column was obtained at 10 kGy irradiation when the total concentration of monomers and cross-linker were charged at 20 and 25%, respectively.
Ueki, Yuji; Katakai, Akio; Tamada, Masao; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Umemura, Tomonari*
no journal, ,
no abstracts in English
Ueki, Yuji; Sato, Harutomo*; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Umemura, Tomonari*
no journal, ,
no abstracts in English
