The Inorganic Chemical Industry Subcommittee of National Standardization Technical Committee of Chemical had its annual conference in Changde, Hunan from Nov 7th - Nov 12th, 2003, which was organized by Tianjin Research Institute of Chemical Industry. Liu The Inorganic Chemical Industry Subcommittee of National Standardization Technical Committee of Chemical had its annual conference in Changde, Hunan from Nov 7th - Nov 12th, 2003, which was organized by Tianjin Research Institute of Chemical Industry. Liu