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gc法快速测定头孢唑林钠中控丙酮残留

山东化工 2024年第1期53卷 160-162页

作者：巩海雪孙玉双表亚囡鲍楠楠焦云飞华北制药河北华民药业有限责任公司河北石家庄052165 抗生素酶催化与结晶技术国家地方联合工程实验室河北石家庄052165 河北省头孢类药物制备技术创新中心河北石家庄052165 华北制药河北华民药业有限责任公司河北省企业技术中心河北石家庄052165

开发合理测定丙酮的方法,采用gc直接进样方式,FID检测器,载气为氮气,进样量1μL,流速1.5 mL/min,分流比20∶1,进样口温度200℃,检测器温度250℃,程序升温运行18.833 min。各项验证均符合要求,操作简便,灵敏度高。该方法可用于快速准确... 详细信息

开发合理测定丙酮的方法,采用gc直接进样方式,FID检测器,载气为氮气,进样量1μL,流速1.5 mL/min,分流比20∶1,进样口温度200℃,检测器温度250℃,程序升温运行18.833 min。各项验证均符合要求,操作简便,灵敏度高。该方法可用于快速准确测定头孢唑林钠中控丙酮的含量。

关键词： gc 中控头孢唑林钠丙酮

乙醇/K_(2)HPO_(4)水萃取体系结合gc检测杨梅酒中农药残留

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酿酒科技 2024年第6期 130-134页

作者：余优霞谢冉阳陈英子王辉鲍盈颖宁海县食品检测中心浙江宁波315600 宁海县农业农村局浙江宁波315600

以杨梅酒中的乙醇为萃取剂,将乙醇/K_(2)HPO_(4)水作为萃取体系,利用gc检测酒中的农药残留。在盐析过程中加入适量的磷酸二氢钾,可以实现两相快速分层;在净化过程中加入适量硫酸镁,即可实现萃取液净化。16种农残在10~500 mg/L范围内线... 详细信息

以杨梅酒中的乙醇为萃取剂,将乙醇/K_(2)HPO_(4)水作为萃取体系,利用gc检测酒中的农药残留。在盐析过程中加入适量的磷酸二氢钾,可以实现两相快速分层;在净化过程中加入适量硫酸镁,即可实现萃取液净化。16种农残在10~500 mg/L范围内线性关系良好,线性关系系数均大于0.999,定量限在3.2~18.2μg/kg之间;16种农药的加标回收率在76%~118%之间,相对标准偏差为0.4%~10%。本方法测定杨梅酒中的农药残留具有快速、简单的特点,可应用于酒中农残的检测,同时也适用于枇杷酒中农药残留的测定。

关键词：杨梅酒农药残留盐析萃取 gc

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JVM 11中的G1 gc关键参数分析

数字通信世界 2024年第6期 103-105页

作者：丛储俊殷军普上海威士顿信息技术股份有限公司上海200052

Java是目前大数据组件的主要开发语言,JVM 11是目前成熟的大数据平台所支持的最新的LTS(Long Term Support)版本,G1 gc(Garbage-First Collector)是JVM 11的缺省gc方式,所以掌握JVM 11中的G1 gc的关键参数对于Java应用特别是长期运行的... 详细信息

Java是目前大数据组件的主要开发语言,JVM 11是目前成熟的大数据平台所支持的最新的LTS(Long Term Support)版本,G1 gc(Garbage-First Collector)是JVM 11的缺省gc方式,所以掌握JVM 11中的G1 gc的关键参数对于Java应用特别是长期运行的服务端应用有很重要的意义。该文对G1 gc的关键概念进行了介绍,分析了关键参数的的含义,给出了适用于Apache H Base的G1 gc参数参考。

关键词： JVM gc G1 gc Apache H Base

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气相色谱法测定逍遥胶囊中薄荷脑含量

中文科技期刊数据库（全文版）医药卫生 2024年第1期 148-152页

作者：孙艳丽高晓艳丁乙王静方金锋江苏康缘药业股份有限公司江苏连云港222047

建立gc法测定逍遥胶囊中薄荷脑的含量测定方法。方法 gc法;色谱柱选取聚乙二醇20M(25m*0.25mm*0.25μm)毛细管柱;检测器为FID检测器,温度250℃;进样口温度220℃,进样模式为液体直接进样,进样量为1ul;恒温,柱温70℃;载气流速为1.0ml/min... 详细信息

建立gc法测定逍遥胶囊中薄荷脑的含量测定方法。方法 gc法;色谱柱选取聚乙二醇20M(25m*0.25mm*0.25μm)毛细管柱;检测器为FID检测器,温度250℃;进样口温度220℃,进样模式为液体直接进样,进样量为1ul;恒温,柱温70℃;载气流速为1.0ml/min,分流模式。结果逍遥胶囊中薄荷脑在9.82ug/ml~196.2ug/ml的区间内呈现出良好线性关系;且稳定性及重复性试验结果的RSD均显示良好,分别为0.7%、0.6%;加样回收率为96.0%。结论本文所建立的方法便捷高效,准确度与精密度高,专属性与稳定性强,为完善逍遥胶囊的质量标准及合理用药提供参考。

关键词：逍遥胶囊薄荷脑 gc

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不同产地拟黑多刺蚁质量评价研究

海峡药学 2024年第1期36卷 36-40页

作者：何丽丹赵开军彭雲黄芳王海丽中国药科大学中药学院江苏南京211198 南京中山制药有限公司江苏省中药经典名方工程技术研究中心江苏南京210046 江苏弘典中药产业研究院有限公司南京市临床经验方现代化工程研究中心江苏南京210042

目的通过比较浸出物、蚁酸和金属元素含量,系统研究7个产地21批拟黑多刺蚁药材的质量差异,建立一个多元的拟黑多刺蚁药材质量控制体系。方法按照《中国药典》2020年版测定拟黑多刺蚁浸出物含量;乙醇衍生-顶空气相色谱(gc)法测定拟黑... 详细信息

目的通过比较浸出物、蚁酸和金属元素含量,系统研究7个产地21批拟黑多刺蚁药材的质量差异,建立一个多元的拟黑多刺蚁药材质量控制体系。方法按照《中国药典》2020年版测定拟黑多刺蚁浸出物含量;乙醇衍生-顶空气相色谱(gc)法测定拟黑多刺蚁中蚁酸的含量;微波消解-电感耦合等离子体质谱(ICP-MS)法测定拟黑多刺蚁中Mg、Ca、Na、K、Fe、Cu、Zn、Mn、Cr、Co、V、Se 12种元素的含量;采用SPSS结合聚类分析和主成分分析法进行多元统计学分析,评价不同产地拟黑多刺蚁的质量差异。结果 gc测定法显示蚁酸在0.2 mg·mL^(-1)~10 mg·mL^(-1)范围内线性关系良好(R^(2)=1.000),加样回收率为99%~103%;ICP-MS测定法显示12种元素精密度良好(RSD=2.07%~5.09%),重复性良好(RSD=2.58%~7.49%),在各自浓度范围内线性关系良好(R^(2)=0.996~0.999);聚类分析结果显示21批样品可分为3大类:S4~S15、S19和S21聚为一类,S1~S3和S16~S18聚为一类,S20单独为一类;经主成分分析,主成分1、主成分2、主成分3是影响药材品质质量评价的主要因子,3个主成分的累积方差贡献率为91.339%,以S20的主成分综合得分最高,S21的主成分综合得分最低。结论基于浸出物、蚁酸和金属元素含量,结合聚类分析和主成分分析法进行的多元统计学分析能够评价不同产地拟黑多刺蚁质量,为优质拟黑多刺蚁的产地筛选提供参考。

关键词：拟黑多刺蚁蚁酸多元素 gc ICP-MS 聚类分析主成分分析质量评价

The structure of Crimean-Congo hemorrhagic fever virus gc is revealed;many more still need an answer

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Virologica Sinica 2022年第4期37卷 634-636页

作者： Wei Ye Chuantao Ye Yongliang Hu Yangchao Dong Yingfeng Lei Fanglin Zhang Department of Microbiology School of Preclinical MedicineAirforce Medical University:Fourth Military Medical UniversityXi'an710032China Department of Infectious Diseases Tangdu HospitalAirforce Medical University:Fourth Military Medical UniversityXi'an710038China Department of Dermatology The Eighth Medical Center of PLA General HospitalBeijing100091China

Crimean-Congo hemorrhagic fever virus(CCHFV)is regarded as one of the most deadly viruses,with mortality of up to 40%.Currently,no licensed vaccine with validated efficacy against CCHFV is available.CCHFV uses Gn and gc glycoproteins to bind and penetrate the cell,like other bunyaviruses(Hulswit et al.,2021).Thus,the desired vaccines are needed,to elicit a potent neutralizing antibody(NAb)response to counteract this process.

关键词： hemorrhagic fever gc

Characteristics of Hydrogen-rich Coals in Southern China:Implications from Organic Geochemistry and Carbon Isotopic Compositions

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Acta Geologica Sinica(English Edition) 2022年第1期96卷 309-320页

作者： LIN Yuhan WANG Shaoqing YANG Zongda ZHAO Yungang YANG Yi College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China Wanbao Mining Ltd. Beijing 100053China

The organic geochemical characteristics of hydrogen-rich coal in southern China were investigated synthetically through organic geochemistry and carbon isotope analyses.The results showed that the hydrogen contents of the test samples were more than 5.0% and the H/C atomic ratios were between 0.76-1.06.Samples were found to be composed mostly of Type Ⅱ-Ⅲ℃ kerogen,consistent with good hydrocarbon-generation potential.The R_(o)(0.54-1.10%)and T_(max)(430-453℃)values imply that the hydrogen-rich coals were in low maturity to mature stages.Stable carbon isotopic ratios(δ^(13)C_(org))of the samples used varied from −24.5‰ to −23.4‰,the barkinite content ranging from 13.9% to 83.3%,indicating a predominantly terrestrial origin with marine influence during coal formation.Some organic geochemical parameters showed corresponding changes as the hydrogen content increased from 5.0% to 7.0%,however,the source inputs changed significantly when hydrogen content was greater than 6.0%.Terrestrial higher plants gradually become predominant within the coal-forming materials,whereas this dominant position is not apparent at lower hydrogen contents,which is attributable to the strong seawater effect during the hydrogen-rich coal formation process.

关键词： hydrogen-rich coal carbon isotope geochemistry Rock-Eval gc gc-MS

Advanced analytical determination of volatile organic compounds (VOC) and other major contaminants in water samples using gc-Ion Trap MS

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Journal of Environmental Sciences 2001年第1期13卷 25-36页

作者： Koroma, B. M. Wang, Kai-xiong Jinya, D. D. Laboratory of Socioeconomic Science of Food Production Nagoya University Japan Department of Environmental Engineering Zhejiang University Hangzhou 310029 China. E-mail:[email protected] Kitakyushu Institute of Environmental Sciences Kitakyushu City Japan

The gc-Ion Trap MS is recently one of the most efficient instrumental analysis recommended for understanding the chemistry of these organic compounds, not only in water but even in the food chain and other environmental media (air and soil). Results of the experiment conducted on water samples from Kuguri and Yatsutani sampling stations showed considerably higher levels of organic enrichment (COD=10 mg/L and 11 mg/L respectively). Total concentrations of Pb (0.072 mg/L and 0.093 mg/L) and Cd (0.004 mg/Land 0.011 mg/L) on the other hand, invariably exceeded the maximum allowable concentrations for human health and the living environment (Pb=0.005 mg/L; Cd=0.001 mg/L respectively). And the toxicity levels for these contaminants at LC_50 showed critical impact on rainbow trout (hypersensitive species) at 0.14 mg/L for Pb and 0.007 mg/L for Cd in 96 hours respectively. Although these major contaminants including phenol and 3-, 4-cresol, showed relatively higher toxicity impact in the experimental media, it would remain contentious to justify any associated potential dangers without regular routine water monitoring, at least for a period of one year. Nevertheless, the data could serve as a benchmark through which other phenomena can easily be investigated.

关键词： www Advanced analytical determination of volatile organic compounds and other major contaminants in water samples using gc-Ion Trap MS VOC EB gc

An improved gas chromatography for rapid measurement of CO2, CH4 and N2O

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Journal of Environmental Sciences 2006年第1期18卷 162-169页

作者： WANG Ying-hong WANG Yue-si SUN Yang XU Zhong-jun LIU Guang-ren Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

Combining improved injector, gas line and valve-driving modules, a gc equipped with FID and ECD, could simultaneously measure CH4, CO2 and N2O in an air sample within 4 min. Test results showed that the system has high sensitivity, resolution and precision; the linear response range of the system meets the requirement of in situ flux measurements. Thus, the system is suitable for monitoring fluxes of main greenhouse gases in terrestrial ecosystem since it is easy to use, efficacious, stable and reliable to collect data.

关键词： gc valve emission of greenhouse gases ecosystem