Standard No.:	GB 7479-1987
English Name:	Water quality - Determination of ammonium-Nessler
Chinese Name:	水质 铵的测定 纳氏试剂比色法
Chinese Classification:	Z16    Analysis methods for toxic substances in water
Professional Classification:	GB    National Standard
Issued by:	State Environmental Protection Administration
Issued on:	1987-03-06
Implemented on:	1987-8-1
Status:	superseded
Superseded by:	HJ 535-2009 Water Quality - Determination of Ammonia Nitrogen - Nesslers Reagent Spectrophotometry
Superseded on:	2010-4-1
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	60.0
Delivery:	via email in 1~3 business day

本标准适用于生活饮用水、地面水和废水。样品中含有悬浮物、余氯、钙镁等金属离子、硫化物和有机物时，会产生干扰，含有此类物质时，要作适当的预处理，以消除对测定的影响。范围：最大试份体积为50ml时，铵氮浓度СN可达2mg/L。最低检出浓度：目视法：试份体积为50ml时，最低检出浓度为0.02mg/L。分光光度法：试份体积为50ml时，使用光程长为10mm比色皿时，最低检出浓度为0.05mg/L。灵敏度：使用50ml试份，光程长为10mm比色皿，СN=1.0mg/L，给出的吸光度约为0.2个单位。