[11p-Z24-1~13] 3.9 Terahertz technologies

[11p-Z24-8] Capillary electrophoresis combined with THz spectroscopic detection:Sensitivity improvement with an AR-coated DAST crystal and thin wall-capillaries

〇Keiko Kitagishi¹, Kazunori Serita¹, Hirohisa Uchida^2,3, Chisa Koyama³, Takeshi Takagi³, Takayuki Kawai⁴, Masayoshi Tonouchi¹ (1.Osaka Univ., 2.Nagoya Uiv., 3.ARKRAY Inc., 4.RIKEN BDR)

Keywords:terahertz, capillary electrophoresis, DAST crystal

Capillary electrophoresis of acetate and propionic acid was achieved with a thin wall-capillary etched by hydrogen fluoride combined with localized THz spectroscopic detection by using an AR-coated DAST crystal as THz wave source. The detection sensitivity was successfully improved. The two carboxylic acids could be separated, and the time waveforms expected to be comparable for each carboxylic acid were obtained.