Optimization of simplified activated carbon-silica gel reversible columns cleanup methods for analysis of 29 hazardous dioxins in soil, sediment and biological samples Publication Attachment: 05-529.pdf Authors: Kitamura, Kimiyoshi, Takazawa, Yoshikatsu, Hashimoto, Shunji, Ito, Hiroyasu, Morita, Masatoshi Year: 2005