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在酸性溶液中,高锰酸钾能氧化核黄素产生化学发光,连二亚硫酸钠的存在可使发光强度大大增强。采用流动注射技术,建立了测定核黄素的化学发光分析法。方法的检出限为6.2×10-8g/mL,线性范围为2×10-7~1×10-5g/mL,对4.0×10-6g/mL核黄素进行11次平行测定,相对标准偏差为1.8%。方法用于针剂和片剂中核黄素测定,与药典标准方法-紫外分光光度法对照,相对误差不大于±2%。
In acidic solution, potassium permanganate can oxidize riboflavin to generate chemiluminescence, and the presence of sodium dithionite can greatly enhance the luminescence intensity. Flow injection technique was used to establish a chemiluminescence assay for the determination of riboflavin. The detection limit of this method was 6.2 × 10-8g / mL with a linear range of 2 × 10-7 ~ 1 × 10-5g / mL. Riboflavin of 4.0 × 10-6g / mL was parallelized 11 times The relative standard deviation was 1.8%. The method was applied to the determination of riboflavin in injection and tablet. Compared with the standard method of Pharmacopoeia - UV spectrophotometry, the relative error was no more than ± 2%.