11/19/2023 0 Comments Barium sulfate precipitate color![]() The fineness and purity of barium sulfate powder should reach the standard comply of the codex. At 1 day before the test, disable the using of drugs which affect stomach and intestine such as atropine, calcium, bismuth, laxatives, etc., it recommended to take low-residue food and fast after dinner.Ħ. within 3 days before the examination, the patients are disabled for administering drugs with higher atomic weight such as bismuth, calcium preparations. For patients with pyloric obstruction symptoms, apply gastric lavage for at least twice at the day before the test.ĥ. At 1 to 2 hours before barium enema, the patients must first subject to cleansing enema the patients are not allowed for taking laxative at 1 day before the examination.Ĥ. Fast for 6 to 12 hours before oral administration of barium agent usually take this agent for examination during empty stomach in the morning. ![]() Avoid by all means mixing it with barium chloride (highly toxic) to avoid poisoning after absorption.ģ. The barium sulfate must comply with the purity stated in Chinese Pharmacopeia without containing soluble barium salt. Instead, the patient can apply iodized oil or water-soluble contrast agent.Ģ. ![]() Patients of congenital diseases such as tracheal fistula and esophageal atresia are not allowed for using this agent for examination. Patients of acute gastrointestinal perforation, gastrointestinal bleeding, colon infarction, acute gastroenteritis, and corrosive esophagitis should be disabled. The above information is edited by the Chemicalbook of Dai Xiongfeng.ġ. It contains 58.85% of barium.įigure 1 is a white powder of barium sulfate. Barium sulfate (Ⅰ type and Ⅱ type) are both insoluble in water, organic solvent, acid o and sodium hydroxide. It is white loose powder, and is odorless and tasteless. Calculated from the dry goods, the barium sulfate content should not be less than 97%. II-type barium sulfate: it is refined from barite sulfate type minerals: barium sulfate. I-type barium sulfate: it is white loose powder and is odorless and tasteless. It is produced from the reaction between sulfuric acid and barium chloride. It can also be used as a white pigment and an administrated agent upon stomach X-ray angiography it can also used as copper flux, drilling mud weight enlarging agent and the filling agent of rubber, paper, and plastic. It can be used in analysis reagents, electronics, instrumentation, metallurgy and other industries. Barium sulfate is the only non-toxic barium salts. Therefore, it is medically used as the agent (barium meal) for X-rays on the gut and stomach. It has a strong ability for absorbing X-rays with X-ray being impermeable to it. Upon co-heating with carbon (pulverized coal) to 800 ℃, it is reduced to soluble barium sulfide and carbon monoxide. In nature, it is existed in the barite mineral form. It is slightly soluble in concentrated sulfuric acid and soluble in carbonate alkali metal solution in which it is converted to barium carbonate it is insoluble in other kinds of acid or base. It is almost insoluble in water with the solubility being 0.00022 at 18 ℃ and 0.0041 at 100 ℃. Upon being heated to 1149 ℃, it will become monoclinic crystalline when the refractive index is 1.649. It is colorless or white orthorhombic crystals with relative molecular mass of 233.4, the relative density of 4.5 (15 ℃), the melting point of 1580 ℃, and the Refractive index of 1.637. Barium sulfate has its chemical formula BaSO4.
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