藻酸双酯钠系由海藻酸钠水解酯化而成的一种藻酸丙酯的硫酸酯钠盐 ,具有降血脂、扩张血管、改善微循环、降血压及降血糖的作用 ,其片剂含量测定方法采用络合滴定法 ,即先将藻酸双酯钠水解为硫酸盐 ,然后加过量的氯化钡标准溶液 ,与硫酸根离子发生反应 ,过量的氯化钡在一定的pH Sodium alginate is sodium alginate esterified by sodium alginate esterification and has the functions of lowering blood fat, dilating blood vessels, improving microcirculation, lowering blood pressure and lowering blood sugar. The tablets Determination of content by complexometric titration, that is, the first sodium alginate hydrolysis to sulfate, and then add an excess of barium chloride standard solution, and sulfate ions react, excessive barium chloride at a certain pH