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Determination of Significance：
Soil ammonium nitrogen is an important component of soil available nitrogen, which can be directly absorbed and utilized by plants. Ammonium nitrogen index plays an important role in agricultural production.
Measurement Principle：
In the strong alkaline medium, the ammonium nitrogen in the soil interacts with hypochlorite and phenol to form indophenol blue dye, which has a characteristic absorption peak at 630 nm, and the absorption value is directly proportional to the ammonium nitrogen content.
Self Provided：
Spectrophotometer, scale, centrifuge, 1 mL glass cuvette, oscillator, water bath.
Note：Product information may be optimized and upgraded. Please refer to the actual label information for accuracy.
Remark：
These protocols are for reference only. Solarbio does not independently validate these
methods.
Note：
1. The products are all for scientific research use only. Do not use it for medical, clinical diagnosis or treatment, food and cosmetics, etc. Do not store them in ordinary residential areas.
2. For your safety and health, please wear laboratory clothes, disposable gloves and masks.
3. The experimental results may be affected by many factors, after-sale service is limited to the product itself and does not involve other compensation.
