The recovered hydrogenate has more impurity, so a new purification method was usedwhichsettl-ed the tail peak problem in finished Doxycycline Hyclate.

采用向盐酸多西环素精制母中加5-磺基杨酸方法,从精制母中回收出氢化,定了最佳配比。

The content of As and Sb in paints are analyzed by hydride generat io n atomic fluorescence spectrometry (HG-AFS) and L-cysteine prereduction proces s.

采用氢化发生-原子荧光光谱法,用L-半胱氨酸预还原法,对涂料中砷锑进行了分析。