Article - C18 Column

ForewordOrganic acids can react with alcohols to produce esters. The carboxyl group is the functional group of the carboxylic acid. Except for the formic acid (H-COOH), the carboxylic acid can be regarded as a derivative after the hydrogen atoms in t..

Colorant, also known as food pigment, is the main purpose of food coloring, to make food give color and improve the material of food color. At present, there are more than 60 kinds of food coloring agents commonly used in the world, and 46 kinds are ..

Semen Zizyphi Spinosae  The jujube kernel for rhamliaceae plant jujube [Ziziphus jujuba Mill.var.spinosa（Bunge）Hu ex H.F. Chou] dry mature seeds, first contained in 'Shennong Materia Medica Classic', listed as the top grade, its taste sweet, sour, fl..