title: A portable total reflection X-ray fluorescence spectrometer with a diamond-like carbon coated X-ray reflector.
abstract: A diamond-like carbon (DLC) coated quartz glass sample holder is used in a portable total reflection X-ray fluorescence (TXRF) spectrometer. A spot area of a water sample on the DLC sample holder becomes smaller than that on a quartz glass sample holder usually used in TXRF analysis because DLC is more hydrophobic. Therefore, the use of the DLC sample holder enhances fluorescent X-rays reaching a detector compared with the use of a quartz glass sample holder, leading to improvement in detection sensitivity. A detection limit of 28 pg is achieved for Cr in a river water sample when using the DLC sample holder.
authors.affiliation: Materials Fabrication Laboratory, RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. kunimura@riken.jp
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Kunimura
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ohmori