1、 Product Overview
There are A and B types of instruments depending on the testing standards. Combined with sample colorimetric reaction pretreatment, rapid and accurate colorimetric determination of samples can be achieved, which has the advantages of stability, sensitivity, reliability, and mercury free.
2、 Product features:
1. Salicylic acid colorimetric method is used to measure ammonia nitrogen in water quality. Sodium dichloroisothiocyanate, which is regulated by the standard, is used instead of commonly used sodium hypochlorite to greatly enhance the stability and effectiveness of the reagent solution containing chlorine (Type B).
2. The instrument can produce and store standard colorimetric curves, and adjust the ammonia nitrogen colorimetric curve of water quality according to different water objects.
3. The use of an optical colorimetric system greatly improves the reliability and stability of the instrument.
4. Sample processing method, under the premise of accurate analysis results, shortens the analysis time (Type B).
3、 Technical indicators and performance parameters
1. Measurement range: Direct measurement of ammonia nitrogen concentration ranging from 0.01mg/L to 20mg/L; Dilution measurement of water quality greater than 20mg/L;
2. Instrument accuracy: Ammonia nitrogen concentration ranges from 0.01mg/L to 0.1mg/L, with an absolute error of ≤± 0.01mg/L; The concentration of ammonia nitrogen is>0.1mg/L to 1.0mg/L, with a relative error of ≤± 10%
3. Instrument repeatability error: Ammonia nitrogen concentration is 0.01mg/L-0.1mg/L, standard deviation S ≤ 0.01mg/L; Ammonia nitrogen concentration is>0.1mg/L~1.0mg/L, with a relative standard deviation Cv ≤ 8%
4. Analysis time: no more than 30 minutes;
5. Data input: membrane switch keyboard;
6. Data output: LCD display, printer printing