Trace benzene analyzer in polymerization solvent n-hexane

n-hexane is widely used in food, chemical, pharmaceutical and other industries. In the food industry, n-hexane is used as the extraction solvent for edible oils and fats. In the chemical industry, n-hexane is used as an excellent solvent and as an excellent cleaning agent and coolant in other industries. At present, the methods for producing n-hexane at home and abroad mainly include adsorption, hydrogenation and other methods. The food industry extraction grade n-hexane produced is obtained by distillation of No. 1 solvent oil after hydrogenation. The boiling points of benzene and n-hexane differ by about ℃ under normal pressure. Due to the strong volatility of benzene during processing, a small amount of benzene is entrained more or less. Benzene is toxic, and long-term intake can cause diseases such as damage to the hematopoietic system and immune system, manifested as leukopenia, platelet decline, and eventually aplastic anemia. The benzene content in food-grade n-hexane must be strictly controlled. my country's current indicator is less than //, while Shell's is less than//. Compared with foreign countries, the quality indicators are obviously much looser. At present, the methods for measuring the benzene content in industrial n-hexane include ultraviolet spectrophotometry and chromatography. The benzene concentration range measured is.~,.
Our company has established an external standard method to determine the trace benzene content in n-hexane, a combined solvent, with reference to B/, method - and established an external standard method. The method has high sensitivity and the results are accurate and reliable.