Vanadium trichloride mixed powder and application thereof in quickly measuring nitrate content in food

• Main Authors: LEI HONGTAO, LU HUIYIN, WU QING, LIU QI, WENG ROUDAN, SUN YUANMING
• Format: Patent
• Language: Chinese; English
• Published: 21.09.2016
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a vanadium trichloride mixed powder and the application thereof in quickly measuring the nitrate content in the food. The vanadium trichloride mixed powder is composed of sodium chloride, sulfamic acid, sulfanilic acid, naphthyl ethylenediamine hydrochloride and vanadium trichloride. When the vanadium trichloride mixed powder is applied to quickly measure the nitrate content in the food, firstly, the food is homogenized and then metered in volume by using the acetic acid solution. After that, the homogenized food is oscillated and filtered to obtain a sample solution. Secondly, the vanadium trichloride mixed powder is added into the sample solution, and the obtained product is shaken uniformly, subjected to water bath and cooled. The light absorption value of the obtained product is measured and then the nitrate content is calculated according to a standard curve. According to the technical scheme of the invention, the method is simple and easy to operate, fast, short in consumed time,