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Research on the quality control technology for the Astragalus membranaceus extraction solution in cosmetics
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作者 Rupei Wang Liang Chu +3 位作者 Qingying Chen Wenli Li Chunyan Li Ping Fu 《日用化学工业(中英文)》 CAS 北大核心 2024年第12期1524-1531,共8页
Calycosin-7-glucoside,which is the target ingredient of the Astragalus membranaceus extraction solution,was studied by the high-performance liquid chromatography-diode array detector method(HPLC-DAD),and a high-perfor... Calycosin-7-glucoside,which is the target ingredient of the Astragalus membranaceus extraction solution,was studied by the high-performance liquid chromatography-diode array detector method(HPLC-DAD),and a high-performance liquid chromatography-electrospray ionization detector method(HPLC-CAD)was also established for fingerprint chromatogram analysis.Meanwhile,the heavy metal content was tested to build a quality control standard for Astragalus membranaceus extraction solution.Result shows a good linearity in 4-80μg/mL mass concentration range with the correlation coefficient r=0.999,RSD=2.4%,and the recovery rate is between 99.2%-102.7%.The fingerprint chromatogram analysis features with 14 specific peaks,including 5 identified components.The similarity is between 0.485 to 0.995.Content of heavy metals such as lead,mercury,and cadmium are below the detection limit,and the content of arsenic is less than 2 mg/kg.This research results can serve as process optimization basis and quality control standards for Astragalus membranaceus extraction solution,and provide reference to quality control and research guideline for other cosmetics using herbal extracts as raw materials. 展开更多
关键词 Astragalus membranaceus extraction solution quality control technology CALYCOSIN-7-GLUCOSIDE fingerprint chromatogram heavy metal
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空客A320飞机液压系统特点及常见故障研究
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作者 陈清影 《中国航班》 2019年第11期24-24,40,共2页
空客 A320 是 150 座的客机,其由欧洲公客公司研制并生产的,采用先进的电子和材料设备,材料以复合材料为主。空客 A320 中的液压系统运行功率大,并且具有较高的可靠性,在应用过程中,一般都不会出现问题。但是,在长期应用后过程中,避免... 空客 A320 是 150 座的客机,其由欧洲公客公司研制并生产的,采用先进的电子和材料设备,材料以复合材料为主。空客 A320 中的液压系统运行功率大,并且具有较高的可靠性,在应用过程中,一般都不会出现问题。但是,在长期应用后过程中,避免不了会出现一些问题,这些将会对空客 A320 的应用造成一定影响。下面,针对空客 A320 飞机液压系统具体特点,以及常见故障进行深入分析。 展开更多
关键词 空客A320飞机 液压系统 安全运行 常见故障
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