All of these officialmethods are problematic for separating or testing the gentamicin C components and related impurities and consequently, the root causes were investigated.
改进了国外使用的了采用常规反相液相色谱-积分脉冲安培检测器法分析硫酸庆大霉素组分和有关物质的方法；
2
The IHME believes that scientific journals and official agencies should adopt rigorous vetting methods of predictive power, such as the 20% tests and decadal-withholding exercises.
Using methods dating back 250 years, the set was handmade in Stoke-on-Trent by the same potteries responsible for the Duke and Duchess of Cambridge's official commemorative wedding China.