Dissertation > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Environmental monitoring > Water quality monitoring

Research on Automatic Analytical Method of Nitrite and Ammonia and Iron (Ⅲ) in Water Environment

Author WuJinMiao
Tutor ZhangXinShen
School Sichuan University
Course Environmental Engineering
Keywords Water Environment Nitrite nitrogen Ammonia Flow Injection Analysis of iron ( III ) Inverting Automatic Reference Flow Injection Method
CLC X832
Type Master's thesis
Year 2005
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The water is a valuable human resources , the fountain of life , but the water pollution in the world is still fairly common but serious . With today 's environmental problems have become increasingly prominent environmental pollutants emissions control more and more attention has been paid . To control the discharge of pollutants , first need for online monitoring of pollutant emissions of the various sources of pollution . In this paper, the National 863 automatic nutrient analyzer standardized requirements , application of new analytical methods of Professor Zhang Xinshen proposed - the The Inverting automatic parameter than flow injection method (Reverse Automatic of Reference Flow Injection rFIA ) , carried out in environmental water samples NO 2 < / sub > - < / sup > and NH 4 < / sub > automatic analysis method . Inverting automatic reference flow injection analysis method for NO 2 < / sub > - < / sup > and NH 4 < / sup> analysis has not yet reported . Flow injection analysis method for the study of environmental water samples the middle Fe 3 automatic analysis method . Wherein the of NO 2 < / sub > - < / SUP > automatic analysis method used in chromogenic reaction system is sulfonamides - . Dihydrochloride -1 - naphthylethylenediamine (NED) , NH 4 < / sub> in the automatic analyzer using the color of the reaction system is the hypobromite oxidation sulfa -NED thiocyanate automatically used in the analysis of the of Fe 3 < / sup> - crystal violet color reaction system . The automatic analysis methods and completely abandon the traditional manual colorimetric operation is complicated and time-consuming , consuming large quantities of chemical reagents , easy introduction of the shortcomings of human error , and environmental water samples in the true sense of the NO 2 - < / sup> , NH 4 and Fe 3 automatic online analysis , as an environment - friendly green analytical methods , has a good prospect of application in the field of environmental monitoring . The papers selected through the test flow injection spectrophotometric spectrophotometric measurements in environmental water samples NO 2 - , NH 4 and Fe 3 optimal analysis of the flow path , oxidants and chromogenic agent. And to explore the automatic analysis the measured water of NO 2 - ,

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