水样总氮测定空白值偏高的探讨  

Discussion on the Higher Absorbance of Blank Tests in Water Total Nitrogen Determination

作　　者：曹群[1] 孙鸿燕[1] 许士雄[1] 

机构地区：[1]南昌航空大学环境与化学工程学院,江西南昌330063

出　　处：《环境监测管理与技术》2008年第3期60-61,共2页The Administration and Technique of Environmental Monitoring

摘　　要：根据《水质总氮的测定碱性过硫酸钾消解紫外分光光度法》(GB 11894-89)测定地表水中的总氮时,空白试验的吸光值常偏高。经对加热消解时间、试验用水水质、试剂添加顺序、储存时间等因素进行了试验,并对操作步骤影响吸光度空白值作了探讨。The higher absorbance of blank test was observed at the determination of total nitrogen in surface water by Water Quality-Total-nitrogen Determination-K2S2 O8 Oxidization Ultraviolet Spectrometry （China National Standard 11894 -89）. The influencing factors were tested such as time of heat digestion, quality of lab water, addition order and storage of reagents. The test steps to influence absorbance blank value was also discussed.

关 键 词：总氮 空白实验 吸光度 过硫酸钾氧化-紫外分光光度法 

分 类 号：O657.32[理学—分析化学]