Water is the rare resourse to human being, and the fountain of life.But water pollution in the world is very universal and serious. As the environmental problems becoming more and more outstanding, more and more people are concerned on the emissions of environmental pollution.To control the emission of pollutants, at first the emission contiditions of all kinds of the pollutants shoud be online monitored.To meet the demands of standardization of the automatic analytic apparatus which is used to detect nutri...