Storage 

Store at -20 ℃,protected from light. 

Description 

Griess reagent can be used determination of nitrite by spectrophotometric. The reagent contains two chemicals, sulfonic acid and N - (1-naphthyl) ethylenediamine. Under acidic conditions, sulfonic acid is converted into diazonium salt by nitrite, which can form highly colored azo dye product with N - (1-naphthyl) ethylenediamine that absorbs visible light at 548nm.

NO is unstable, can be oxidized to form nitrite and nitrate. Griess indirectly reflects the content of NO by detecting the content of nitrite. 

Notes 

1. Before using Griess reagent, return it to room temperature and check for precipitation in the solution. If Griess reagent I contains precipitates, it can be placed in a 37 ℃ water bath until the precipitate dissolves. 

2. This product is potentially harmful. Avoid long-term or repeated contact. Avoid contact with eyes, skin or clothing. 

3. For your safety and health, please wear lab clothes and disposable gloves.