As an important branch of medicine, Traditional Chinese Medicine(TCM) has been applied for the treatment of diseases for thousands of years in China and other countries in East Asia. The Chinese Pharmacopoeia(ChP) is ...As an important branch of medicine, Traditional Chinese Medicine(TCM) has been applied for the treatment of diseases for thousands of years in China and other countries in East Asia. The Chinese Pharmacopoeia(ChP) is a drug code formulated by the Chinese government, and it includes a special volume for the monographs of TCM, which plays an important role in ensuring the quality of drugs. The use of quality control technology has always been a complex and important factor in TCM. Owing to the chemical diversity of TCM, chromatography technology has been proven to be a comprehensive strategy for the assessment of the overall quality of TCM and has become the main analytical method in the ChP.This article provides an overview of the classical and modern chromatographic technologies applied in the ChP, and summarizes the advantages and disadvantages of each technique in the TCM monographs.In 2020, the new edition of the Ch P(the 2020 edition) has been implemented at the end of 2020. This paper also contains a brief introduction about the application of chromatographic technologies in the new edition of the ChP.展开更多
The incorporation of KH560-modified steel slag(MSS)as a filler in alkyd coatings significantly impacts their corrosion resistance and mechanical properties.The modification process was characterized using the Fourier ...The incorporation of KH560-modified steel slag(MSS)as a filler in alkyd coatings significantly impacts their corrosion resistance and mechanical properties.The modification process was characterized using the Fourier transform infrared spectrometer,scanning electron microscope,and X-ray photoelectron spectroscope to understand the chemical and morphological changes induced by KH560 treatment.Three types of coatings were prepared:pure alkyd coating(AC),steel slag/alkyd coating(SS/AC),and KH560-modified steel slag/alkyd coating(MSS/AC).Their corrosion resistance was evaluated by electrochemical impedance spectroscopy and salt spray tests,while mechanical properties such as hardness,adhesion,and flexibility were also assessed.Results show that MSS significantly enhances the hardness,flexibility,and adhesion of the coatings,forming a composite structure(MSS-KH560-alkyd)that significantly improves the performance of MSS/AC.Notably,MSS/AC demonstrated superior hydrophobicity with a water absorption rate of 0.624%and a contact angle of 100.7°.Electrochemical tests revealed an impedance modulus of 3.9×10^(7)Ωcm^(2),a corrosion current of 3.39×10^(−4)mA,and a corrosion potential of−35 mV for MSS/AC.After a 10-d immersion in a 3.5 wt.%NaCl solution,MSS/AC maintained its protective properties.These findings underscore the potential of MSS as a sustainable and effective filler for alkyd coatings in corrosion protection applications.展开更多
文摘As an important branch of medicine, Traditional Chinese Medicine(TCM) has been applied for the treatment of diseases for thousands of years in China and other countries in East Asia. The Chinese Pharmacopoeia(ChP) is a drug code formulated by the Chinese government, and it includes a special volume for the monographs of TCM, which plays an important role in ensuring the quality of drugs. The use of quality control technology has always been a complex and important factor in TCM. Owing to the chemical diversity of TCM, chromatography technology has been proven to be a comprehensive strategy for the assessment of the overall quality of TCM and has become the main analytical method in the ChP.This article provides an overview of the classical and modern chromatographic technologies applied in the ChP, and summarizes the advantages and disadvantages of each technique in the TCM monographs.In 2020, the new edition of the Ch P(the 2020 edition) has been implemented at the end of 2020. This paper also contains a brief introduction about the application of chromatographic technologies in the new edition of the ChP.
基金financially supported by the National Natural Science Foundation of China(No.U23A20605)the Outstanding Youth Fund of Anhui Province(2208085J19)China Baowu Low Carbon Metallurgy Innovation Foundation(No.BWLCF202202).
文摘The incorporation of KH560-modified steel slag(MSS)as a filler in alkyd coatings significantly impacts their corrosion resistance and mechanical properties.The modification process was characterized using the Fourier transform infrared spectrometer,scanning electron microscope,and X-ray photoelectron spectroscope to understand the chemical and morphological changes induced by KH560 treatment.Three types of coatings were prepared:pure alkyd coating(AC),steel slag/alkyd coating(SS/AC),and KH560-modified steel slag/alkyd coating(MSS/AC).Their corrosion resistance was evaluated by electrochemical impedance spectroscopy and salt spray tests,while mechanical properties such as hardness,adhesion,and flexibility were also assessed.Results show that MSS significantly enhances the hardness,flexibility,and adhesion of the coatings,forming a composite structure(MSS-KH560-alkyd)that significantly improves the performance of MSS/AC.Notably,MSS/AC demonstrated superior hydrophobicity with a water absorption rate of 0.624%and a contact angle of 100.7°.Electrochemical tests revealed an impedance modulus of 3.9×10^(7)Ωcm^(2),a corrosion current of 3.39×10^(−4)mA,and a corrosion potential of−35 mV for MSS/AC.After a 10-d immersion in a 3.5 wt.%NaCl solution,MSS/AC maintained its protective properties.These findings underscore the potential of MSS as a sustainable and effective filler for alkyd coatings in corrosion protection applications.
