水体中氨氮含量较高时，对鱼类呈现毒害作用，对人类也有不同程度的危害。测定水中氨氮含量有助于评价水体被污染和“自净”状况，因此氨氮是表征水质污染的重要指标。 该分析仪能够根据现场设定长期无人值守自动连续工作，广泛适用于工业污染源排放废水、市政污水处理厂污水、环境质量地表水等场合。根据现场测试工况的复杂程度，可选配相应的预处理系统，以保证测试过程可靠、测试结果准确，充分满足不同场合现场需求。
本产品选用水杨酸比色测定方法，水样和掩蔽剂混合后，以游离态的氨或铵离子等形式存在的氨氮在碱性环境和增敏剂存在的情况下，与水杨酸盐离子、次氯酸离子反应生成一种带色络合物，分析仪检测此颜色的变化，并把这种变化换算成氨氮值输出来。生成的带色络合物量相当于氨氮量。
本方法适用于氨氮在0-500mg/L范围内的废水，过高的钙镁离子、余氯或浊度等可能会对测量产生干扰。
When the ammonia nitrogen content in the water is high, it is toxic to fish and has different degrees of harm to humans. Determination of ammonia nitrogen content in water helps to assess the pollution and "self-cleaning" of water bodies, so ammonia nitrogen is an important indicator of water pollution. The analyzer can automatically and continuously work according to the on-site setting for long-term unattended operation, and is widely used in industrial waste water discharge, municipal sewage treatment plant sewage, environmental quality surface water and other occasions. According to the complexity of the field test conditions, the corresponding pre-treatment system can be selected to ensure the test process is reliable and the test results are accurate, which fully meets the on-site requirements of different occasions. This product uses salicylic acid colorimetric method. After mixing water sample and masking agent, ammonia nitrogen in the form of free ammonia or ammonium ion exists in the presence of alkaline environment and sensitizer, and salicylate ion. The hypochlorite ion reacts to form a colored complex, and the analyzer detects the change in the color and converts the change into an ammonia nitrogen output. The amount of colored complex formed is equivalent to the amount of ammonia nitrogen. The method is applicable to wastewater with ammonia nitrogen in the range of 0-500 mg/L. Excessive calcium and magnesium ions, residual chlorine or turbidity may interfere with the measurement.
技术参数：
序号
规格名称
技术规格参数
1
适用范围
本产品适用于氨氮在0-300mg/L范围内的废水
2
测试方法
水杨酸分光光度比色法
3
测量量程
0-300mg/L（分档0-8 mg/L、0.1-30 mg/L、5-300 mg/L）
4
检测下限
0.02
5
分辨率
0.01
6
准确度
±10%或±0.1mg/L（二者中的较大值）
7
重复性
5%或0.1mg/L
8
零点漂移
±3mg/L
9
量程漂移
±10%
10
测量周期
测试周期大于20min ，根据现场环境，可在5-120min任意修改显色时间
11
采样周期
时间间隔（可调）、整点或触发测量模式，可设置
12
校准周期
自动校准���1-99天可调），根据实际水样，手工校准可设置
13
维护周期
维护间隔大于1月，每次约30min
14
人机操作
触摸屏显示及指令输入
15
自检保护
仪器工作状态自我诊断，异常或断电后不会丢失数据；异常复位或断电来电后，仪器自动排除残留反应物并自动恢复工作
16
数据存储
不低于半年数据存储
17
输入接口
开关量
18
输出接口
2路RS232数字输出，1路4-20mA模拟输出
19
工作环境
室内工作，建议温度5-28℃，湿度≤90%（不结露）
20
电源与功耗
AC230±10%V，50~60Hz，5A
21
尺寸
高1500×宽550×深450（mm）
Technical Parameters: 1.Scope of application:This product is suitable for wastewater with ammonia nitrogen in the range of 0~300mg/L. 2.Test Methods:Salicylic acid spectrophotometric colorimetry 3.Measuring rang: 0-300mg/L (0-8 mg/L, 0.1-30 mg/L, 5-300 mg/L) 4.Lower limit of detection: 0.02 5.Resolution: 0.01 6.Accuracy: ±10% or ±0.1mg/L (the larger of the two) 7.Repeatability: 5% or 0.1 mg/L 8.Zero drift: ±3mg/L 9.Range drift: ±10% 10.Measurement cycle：The minimum test period is 20min. According to the site environment, the color development time can be arbitrarily modified from 5 to 120 minutes. 11.The sampling period: Interval (adjustable), hour or trigger measurement mode, can be set 12.Calibration cycle: Automatic calibration (1-99 days adjustable), according to the actual water sample, manual calibration can be set 13.Maintenance cycle: Maintenance interval is greater than 1 month, about 30min each time 14.Man-machine operation: Touch screen display and command input 15.Self-test protection: Self-diagnosis of the working state of the instrument, no data will be lost after abnormal or power failure; after abnormal reset or power-off call, the instrument automatically removes residual reactants and automatically resumes work. 16.Data storage: Not less than half a year of data storage 17.Input interface: Switch 18.Output Interface: 2-way RS232 digital output, 1 channel 4-20mA analog output 19.Working environment: Indoor work, recommended temperature 5-28°C, humidity ≤90% (no condensation)
20.Power and power consumption: AC230±10%V, 50-60Hz, 5A
21.Size: Height 1500 × width 550 × depth 450 (mm)