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目的建立空白脂质体透析液中硫酸铵的定量测定方法。方法将样品依次加入显色剂I、显色剂II显色后,在波长630 nm处比色,并进行了线性、精密度、稳定性和加样回收率等项考察。结果该方法线性方程为A=72 035ρ+4.4,质量浓度在1~20 mg·L–1内,线性关系良好(r=0.999 7),该方法精密度为2.65%;显色后2 h比色结果稳定;加样回收率为97.3%~99.5%。结论该方法适于空白脂质体透析液中硫酸铵含量的测定。
Objective To establish a method for the quantitative determination of ammonium sulfate in blank liposome dialysate. Methods The samples were sequentially added to Color Reagent I, Color Reagent II, colorimetric at 630 nm, and the linearity, precision, stability and sample recovery were investigated. Results The linear equation of the method was A = 72 035ρ + 4.4. The linearity was good (r = 0.999 7) with a mass concentration of 1 ~ 20 mg · L-1. The precision of this method was 2.65% The result of color is stable; the recovery of sample is 97.3% ~ 99.5%. Conclusion This method is suitable for the determination of ammonium sulfate in blank liposome dialysate.