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比色法测定复方氨基酸注射液中亚硫酸氢钠含量

Drug Standards of China(2007)

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Abstract
目的:建立分光光度法测定复方氨基酸注射液中亚硫酸氢钠的浓度。方法:利用亚硫酸氢根在EDTA2-存在的酸性条件下,与甲醛和碱性品红作用,生成紫色复合物[1],在560nm处测定吸光度[1]。以此计算测定亚硫酸氢钠含量。结果:亚硫酸氢钠浓度在0.1~8.0μg·ml-1范围内与吸光度呈良好线性关系,其线性方程为A=0.33377×C+0.01094,r=0.99923。用两个不同厂家的产品进行加样回收试验,回收率均在99%以上,RSD小于0.2%(n=6)。结论:该方法稳定,简便易行,快速准确。
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Key words
Compound Amino Acid Injection,Colorimetry,Sodium Hydrogen Sulfite
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