Shen ChangHong Scope of application
This method specifies the Nessler reagent spectrophotometry for the determination of ammonia nitrogen in water.
This method is applicable to surface water, groundwater, domestic sewage and industrial wastewater
When the volume of water sample is 1ml and the diameter of 10 mm colorimetric tube is used, the detection limit of this method is 0.025mg/l, the lower limit of detection is 0.10mg/l and the upper limit of determination is 25.0mg/l.
principle
Ammonia nitrogen in the form of free ammonia or ammonium ion reacts with Nessler's reagent to form a reddish brown complex. The absorbance of the complex is directly proportional to the ammonia nitrogen content.
The ammonia nitrogen determinator developed by Shenzhen Changhong Technology Co., Ltd. (hereinafter referred to as shenchanghong) has simple, fast and economic operation process, and the determination results have good comparison with the salicylic acid determination method. Shenchanghong can provide a complete analysis scheme of the ammonia nitrogen test method, and users do not need to prepare their own ammonia nitrogen reagent. The project includes ammonia nitrogen tester, and matching ammonia nitrogen reagent, etc. Ammonia nitrogen reagent and ammonia nitrogen analyzer are used together, the analysis steps are simple and convenient, and they meet the requirements of Chinese industry standards.
Product features:
● no need to prepare ammonia nitrogen reagent: the reagent prepared by a certain proportion of chemical components required for ammonia nitrogen analysis can greatly save the preparation time of ammonia nitrogen reagent;
● time saving: the whole analysis process, including water sampling, dropping reagent, colorimetric determination and other steps, takes much less time than traditional methods;
● simple operation and easy to learn: the operation guide with pictures and texts is convenient for mastering the analysis method of ammonia nitrogen in a short time.
Analysis steps of shenchanghong ammonia nitrogen Nash colorimetry:
(1) Preparation of ammonia nitrogen reagent and water sample
Put water sample into each ammonia nitrogen tube, add 2 drops of reagent 1 and 3 reagent 2 according to the instructions, tighten the bottle cap, develop the color for 10 minutes and test on the machine.
(2) Ammonia nitrogen colorimetric determination
Shenchanghong's ammonia nitrogen tester (nh-5n / 6N / cn-201 / 201a / cnp-301 / 301c / 301D / cnpn-401 / 401c / 401d / mulp-8c / pmulp-8, etc.), select the corresponding ammonia nitrogen test program in the main menu, do not need to re-establish the standard curve, just put the ammonia nitrogen test tube after color rendering into the instrument to read the ammonia nitrogen value expressed in concentration units, and save the record results.
Brief introduction of the analysis system of shenchanghong ammonia nitrogen Nessler colorimetry
The NH3-N Nessler colorimetric analysis system provided by shenchanghong includes the main machine of NH3-N analyzer and the matching NH3-N reagent.
Instrument host: according to the needs of different customers, shenchanghong company can provide a variety of models of ammonia nitrogen analyzer for the determination of ammonia nitrogen.
More about ammonia nitrogen analyzer can be checked in shenchanghong ammonia nitrogen water quality analyzer.
