Sulfate turbidity standard solution preparation: in a porcelain crucible (or evaporating dish) was added Na2CO3 solution 0.5ml, hydrogen peroxide 2ml, oxalic quotes, hydrochloric acid and distilled water 1ml 10ml, oxalic acid suppliers, in a water bath evaporated, the residue dissolved in 0.5ml hydrochloric acid, with the amount of distilled water into a 50ml colorimetric tube; adding an appropriate amount of sulfate standard solution, then add barium chloride, glycerol, 5ml ethanol mix and sample solution turbidity. To obtain sulfate impurities, oxalic acid, to prepare a series of sulfate turbidity standard solution. Sulfate content of x2 (%) is calculated as follows: X2 = V * 0.00001 * 100 / G * 5 * 50 where: g V- Sulfate ml standard amount of solution samples of several G- number 0.00001-1ml sulfuric acid Root sulfate standard solution of the number of grams of oxalic acid, namely acetic acid, one of the simplest organic dicarboxylic acid. Simple structure HOOCCOOH. It is generally colorless transparent crystal, harmful, people will lose the body's pH balance, affect the development of children, oxalic acid plays an important role in industry, wholesale oxalic acid, oxalic acid can rust. Oxalic acid found in nature, often in the form of oxalate in plants such as barberry, sheep hoof grass, wood sorrel and sorrel cell membrane, almost all plants contain oxalates. Oxalic acid, Jie Yu Chemical, oxalic acid suppliers Chemical Co., Ltd. Guangzhou Jie Yu. Oxalic acid, Jie Yu Chemical, oxalic acid suppliers Jie Yu Guangzhou Chemical Co., Ltd. (shop1370240243690.1688.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest Information, Contact: Exhibition Rouge.