呋喃硫酸注射液为呋喃硫酸的无菌水溶液,属维生素类药,具有维持正常代谢,心脏,神经及消化系统功能。用于治疗维生素B_1缺乏症,也用于神经炎、营养不良、消化不良等辅助治疗~([1,2])。呋喃硫酸注射液未规定有效期限,我们在抽验过程中发现,其质量问题主要是pH值的变化引起,pH值往往会随着贮存期的延长而长高,以致超出标准规定。由于肉眼无法判断其合格与否,不合格产品继续使用 Furan sulfate injection is a sterile aqueous solution of furan sulfuric acid, is a vitamin drugs, with the maintenance of normal metabolism, heart, nerves and digestive system function. For the treatment of vitamin B_1 deficiency, but also for neuritis, malnutrition, indigestion and other adjuvant therapy ~ ([1,2]). Furazan sulfate injection does not provide for the validity period, we found in the testing process, the quality of the problem is mainly caused by changes in pH, pH value tends to grow longer with the storage period, so beyond the standard. As the naked eye can not judge whether it is qualified or not, unqualified products continue to be used