Compounds containing Cr （VI） ion are widely used for chemical industry, paints, dyes, and other applications. Because of commonly known toxicity of Cr （VI） ion, Cr （VI） is one of the important check items for qu...Compounds containing Cr （VI） ion are widely used for chemical industry, paints, dyes, and other applications. Because of commonly known toxicity of Cr （VI） ion, Cr （VI） is one of the important check items for quality of water in natural river or industrial waste water. Although the only method for selective detection for Cr （VI） ion is diphenylcarbazide, of which pretreatment spends long time according to the regulat^ons by the Ministry of Environment, Japan. Herein we develop a new and simple pretreatment for the job site and suitable for education and attempt to apply for analysis of the soil in Tama River actually.展开更多
Mr．Big Band，大先生乐队，如雷贯耳的名字。20世纪80年代后期，这支以速度金属、硬摇滚、流行金属叱咤摇滚乐坛的速度战车，曾是多少摇滚与流行乐迷膜拜的偶像，那首浪漫迷人的单曲《To be with you》时常会在我们的耳边响起。我们至...Mr．Big Band，大先生乐队，如雷贯耳的名字。20世纪80年代后期，这支以速度金属、硬摇滚、流行金属叱咤摇滚乐坛的速度战车，曾是多少摇滚与流行乐迷膜拜的偶像，那首浪漫迷人的单曲《To be with you》时常会在我们的耳边响起。我们至今不能忘记。展开更多
文摘Compounds containing Cr （VI） ion are widely used for chemical industry, paints, dyes, and other applications. Because of commonly known toxicity of Cr （VI） ion, Cr （VI） is one of the important check items for quality of water in natural river or industrial waste water. Although the only method for selective detection for Cr （VI） ion is diphenylcarbazide, of which pretreatment spends long time according to the regulat^ons by the Ministry of Environment, Japan. Herein we develop a new and simple pretreatment for the job site and suitable for education and attempt to apply for analysis of the soil in Tama River actually.
