Literature at home and abroad reported that during years use of MDEA in industry, except for the on caused by oxygen, there are nearly no other degradedproducts.
国内外文献报道MDEA在工业上使用若干年以来除氧引起的降解外，几乎无其他降解物产生。
2
HPLC method has been studied to determine tretinoin soft capsules, the main component was well separated from degradedproducts with resolution capacity over 1.0.
采用硅胶柱对维a酸胶囊进行定量分析，使主成分维a酸与降解物得到很好分离，分离度达1.0以上。
3
Gel permeation chromatography (GPC), Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD) were adopted to characterize and analyze the degradedproducts.