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DES-Fe3O4 composite for rapid extraction of residual plant growth regulators in edible vegetable oil

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Chinese Chemical Letters 2019年第6期30卷 1182-1185页

作者： Ting Tan Xiaomei Xu yiqun wan State Key Laboratory of Food Science and Technology Nanchang University Nanchang 330047 China Center of Analysis and Testing Nanchang University Nanchang 330031 China School of Chemistry Nanchang University Nanchang 330031 China

A rapid DES-Fe3O4 microextraction coupled with liquid chromatography method was ingeniously developed for simultaneous control of five typical plant growth regulators in a planting cycle including indole-3-acetic acid, abscisic acid, thidiazuron, 1-naphthylacetic acid and forchlorfenuron. The experiments were carried out with one type of carboxylic acid-assisted deep eutectic solvent (nChCl:nacetic acid=1:3) as extractant, coupled with ultrasonic wave extraction for 30 min at bath temperature at 50 ℃. Under the optimum conditions, good extraction performances of linearities for five plant growth regulators were achieved separately in the range of 0.10–50 mg/L of indole-3-acetic acid, 0.06–50 mg/L of abscisic acid, 0.20–50 mg/L of thidiazuron, 0.50–50 mg/L of 1-naphthylacetic acid and 0.06–50 mg/L of forchlorfenuron and recoveries were ranged from 70.4%to 102.2%. Meanwhile, Fe3O4 was preferentially combined with DES in the oil matrix, the advantage of which was pointed to rapid and efficient separation of targeted plant growth regulators from complicated oil matrix. The proposed approach achieved satisfied results and met the monitoring requirements of plant growth regulators control in edible vegetable oil samples.

关键词： DES-Fe3O4 composite Deep eutectic solvent Rapid separation Plant growth regulators Edible vegetable oil

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超高效液相色谱-串联质谱法快速检测饲料中7种链格孢霉毒素

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分析科学学报 2024年第5期40卷 524-532页

作者：刘敏海张艳谭婷郭岚刘翻万益群南昌大学化学化工学院江西南昌330031 南昌大学分析测试中心江西南昌330031 江西中医药大学药学院江西南昌330004

建立了一种新型超高效液相色谱-串联质谱分析方法快速检测饲料中细交链格孢菌酮酸、交链孢酚、交链格孢酚单甲醚、交链孢烯、格孢毒素I、AAL Toxin TA1和腾毒素共7种链格孢霉毒素。使用改进的QuEChERS方法用于饲料样品中目标物的提取和... 详细信息

建立了一种新型超高效液相色谱-串联质谱分析方法快速检测饲料中细交链格孢菌酮酸、交链孢酚、交链格孢酚单甲醚、交链孢烯、格孢毒素I、AAL Toxin TA1和腾毒素共7种链格孢霉毒素。使用改进的QuEChERS方法用于饲料样品中目标物的提取和净化,目标物经1%甲酸-乙腈提取后用固体吸附剂进行净化,使用C_(18)柱对7种链格孢霉毒素进行分离,电喷雾正离子模式进行监测。结果显示,细交链格孢菌酮酸、交链孢酚、交链格孢酚单甲醚在20~1000μg/L浓度范围内,交链孢烯、格孢毒素I、腾毒素、AAL Toxin TA1在5~200μg/L浓度范围内均呈现良好的线性关系,其相关系数R^(2)>0.9991,检出限在0.2~3.0μg/L之间。7种链格孢霉毒素的样品加标回收率在73.8%~117.4%之间,相对标准偏差(n=6)为1.5%~9.9%。本方法检测饲料中的链格孢霉毒素具有较高的准确度和灵敏度,可以用于饲料中链格孢霉毒素的检测,对于饲料安全监控具有实际意义。

关键词：饲料链格孢霉高效液相色谱-串联质谱

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Formation of Oxygen Vacancies on the {010} Facets of BiOCl and Visible Light Activity for Degradation of Ciprofloxacin

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Chemical Research in Chinese Universities 2018年第5期34卷 711-718页

作者： ZENG Xiaoxing GONG Xiaofeng wan yiqun HE Ruyang XU Zhaodi School of Resource Environmental and Chemical Engineering Nanchang University Nanehang 330031 P. R. China Institute of Photovoltaies Nanchang University Nanchang 330031 R R. China Center of Analysis and Testing Nanchang University Nanchang 330047 P. R. China Institute of Chemistry Nanchang University Nanchang 330031 P. R. China

BiOC1 nanosheets with oxygen vacancies on the exposed {010} facets were assistant-synthesized by triethanolamine（TEOA） via hydrothermal method. We explored the surface properties, crystal structure, morphology and optical absorption ability of the prepared samples via various characterization technologies. The results indicate that the morphologies and microstructures of the obtained samples depend on the amount of TEOA in the synthesis. The addition of TEOA induces the production of oxygen vacancy on the surface of the samples. Therefore, the synthesized samples with TEOA-assistance hold higher photoactivity for the degradation of colorless antibiotic agent ciprofloxacin（CIP） under visible light（λ≥420 nm）. The obtained sample upon the addition of 20 mL of TEOA exhibits the highest photocatalytic performance, which is nearly 14 times as high as that of the sample prepared without TEOA and twice as high as that of the prepared samples with NaOH or NH3·H2O. The possible degradation mechanism was discussed on the basis of the experiment results.

关键词： BLOC1 Nanosheet Exposed facet Ciprofloxacin Photocatalysis

镀锡板311钝化膜与71钝化膜的组织结构对比

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电镀与涂饰 2024年第8期43卷 34-41页

作者：沈鹏杰齐韦万一群莫志英方圆潘红良首钢京唐钢铁联合有限责任公司河北唐山063200 上海务宝机电科技有限公司上海201900

[目的]镀锡板的钝化工艺会影响其漆膜附着力,分析不同钝化工艺所得钝化膜的结构差异具有重要的意义。[方法]使用X射线光电子能谱仪(XPS)对不同厂家生产的311钝化镀锡板和71钝化镀锡板进行测试,逐层分析0~50 nm深度范围内的Cr、Sn、O、F... 详细信息

[目的]镀锡板的钝化工艺会影响其漆膜附着力,分析不同钝化工艺所得钝化膜的结构差异具有重要的意义。[方法]使用X射线光电子能谱仪(XPS)对不同厂家生产的311钝化镀锡板和71钝化镀锡板进行测试,逐层分析0~50 nm深度范围内的Cr、Sn、O、Fe元素含量及其化学状态。[结果]311钝化镀锡板与71钝化镀锡板边部和中部钝化膜的厚度、覆盖率和层间结构均有所不同,71钝化膜具有较佳的漆膜附着力。[结论]71钝化膜底层的Cr及表层的Cr(OH)3对提高镀锡板附着力具有至关重要的作用。

关键词：镀锡板钝化漆膜附着力结构

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QuEChERS/超高效液相色谱-串联质谱法同时测定柑橘和稻谷中植物生长调节剂残留

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南昌大学学报（理科版） 2024年第2期48卷 122-129页

作者：孔锋黄宁袁丽赵超杨希万益群刘翻鹰潭市检验检测认证院江西鹰潭335000 南昌大学分析测试中心江西南昌330047

建立了一种柑橘和稻谷中8种植物生长调节剂残留同时测定的UHPLC-MS/MS分析方法。采用QuEChERS技术对样品中目标物进行提取净化,用MRM模式监测,基质曲线外标法进行定量。在优化条件下,8种植物生长调节剂(矮壮素、烯效唑、氯吡脲、吲熟酯... 详细信息

建立了一种柑橘和稻谷中8种植物生长调节剂残留同时测定的UHPLC-MS/MS分析方法。采用QuEChERS技术对样品中目标物进行提取净化,用MRM模式监测,基质曲线外标法进行定量。在优化条件下,8种植物生长调节剂(矮壮素、烯效唑、氯吡脲、吲熟酯、胺鲜酯、吲哚-3-丁酸、噻苯隆、2,4-D)在相应的浓度范围内具有良好的线性关系,相关系数均在0.995以上,样品加标回收率在70.1%~105.6%之间,RSD小于10.8%(n=6)。而且样品基质种类和灵敏度优于或相当于现有国家检测标准,同时本方法成功应用于柑橘类水果和稻谷等实际样品中植物生长调节剂残留的检测。本方法准确、灵敏度高,可用于柑橘类水果和稻谷中植物生长调节剂残留的定性和定量分析。

关键词：植物生长调节剂超高效液相色谱-串联质谱 QuEChERS 柑橘和稻谷

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Molecularly imprinted polymer-high performance liquidchromatography quantitative analysis of N-phenylglycine in human urine

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Molecularly imprinted polymer-high performance liquidchromat...

中国化学会第22届全国色谱学术报告会及仪器展览会

作者： Xianyu Liang Huihuang Xiong Qiuli Ouyang Fan Liu yiqun wan College of Chemistry Nanchang University Center of Analysis and Testing Nanchang University

Glycine is a major semi-essential amino acid in human body . Recently, some studies showed that glycine supported tumor growth [2,3]). Some experimental data further suggested that glycine metabolism had relation with some cancers . N-phenylglycine(NPG) is one important metabolite of glycine. However, the study of the relationship between NPG and cancers has not been carried out.

关键词： Molecularly imprinted polymer UPLC Glycine Metabolites Urine

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石蜡相光度法测定痕量钯

分析化学 2000年第5期28卷 606-608页

作者：万益群郭岚戴超 330047 南昌大学化学系!南昌

本文系统研究了钯（Ⅱ）与1-亚硝基-2-萘酚显色体系在石蜡相中的显色反应。在pH=0．6－11．0范围内，石蜡能定量吸附此显色络合物。采用等吸收点双被长光度法测量固相吸光度差值，把的含量在0－1．4mg/L范围内符合比尔定律，从而建立了... 详细信息

本文系统研究了钯（Ⅱ）与1-亚硝基-2-萘酚显色体系在石蜡相中的显色反应。在pH=0．6－11．0范围内，石蜡能定量吸附此显色络合物。采用等吸收点双被长光度法测量固相吸光度差值，把的含量在0－1．4mg/L范围内符合比尔定律，从而建立了钯的石蜡相光度分析法。方法应用于钯分子筛中痕量钯的测定，结果满意。

关键词：钯石蜡相光度法 1-亚硝基-2-萘酚

中草药中有机氯农药和拟除虫菊酯农药残留量的测定

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分析化学 2005年第5期33卷 614-618页

作者：万益群鄢爱平谢明勇南昌330047 南昌大学食品科学教育部重点实验室南昌330047 南昌大学食品科学教育部重点实验室南昌大学分析测试中心

建立了中草药中11种有机氯农药和8种拟除虫菊酯农药的残留气相色谱分析方法。样品用含30%丙酮的乙腈提取,用正己烷进行液液分配,提取液用弗罗里硅土柱净化,采用兰州化物所的农残Ⅱ号毛细管柱分离,用GCECD同时检测。在两个水平添加时的... 详细信息

建立了中草药中11种有机氯农药和8种拟除虫菊酯农药的残留气相色谱分析方法。样品用含30%丙酮的乙腈提取,用正己烷进行液液分配,提取液用弗罗里硅土柱净化,采用兰州化物所的农残Ⅱ号毛细管柱分离,用GCECD同时检测。在两个水平添加时的回收率(n=5)分别为78.6%～119.7%和86.5%～114.0%,相对标准偏差分别为3.6%～8.7%和4.4%～10.2%。该方法的检出限为:有机氯农药0.005mg/kg,拟除虫菊酯农药0.01mg/kg。方法用于江西中草药样品中农药残留测定,结果满意。

关键词：有机氯农药拟除虫菊酯农药残留测定中草药

The chromosome-scale assembly of the Notopterygium incisum genome provides insight into the structural diversity of coumarins

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3760-3773页

作者： Qien Li yiqun Dai Xin-Cheng Huang Lanlan Sun Kaixuan wang Xiao Guo Dingqiao Xu Digao wan Latai An Zixuan wang Huanying Tang Qi Qi Huihui Zeng Minjian Qin Jia-Yu Xue Yucheng Zhao Tibetan Medicine Research Center of Qinghai University Tibetan Medical CollegeQinghai UniversityXining 810016China School of Pharmacy Bengbu Medical UniversityBengbu 233030China Department of Resources Science of Traditional Chinese Medicines School of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing 210009China College of Horticulture Bioinformatics CenterAcademy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjing 210095China Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility Shaanxi University of Chinese MedicineXi’an 712046China

Coumarins,derived from the phenylpropanoid pathway,represent one of the primary metabolites found in *** alignment of the tetrahydropyran(THP)and tetrahydrofuran(THF)rings with the lactone structure results in the formation of at least four types of complex ***,the mechanisms underlying the structural diversity of coumarin remain poorly ***,we report the chromosome-level genome assembly of Notopterygium incisum,spanning 1.64 Gb,with a contig N50 value of 22.7 Mb and 60,021 annotated protein-coding ***,we identified the key enzymes responsible for shaping the structural diversity of coumarins,including two p-coumaroyl CoA 2′-hydroxylases crucial for simple coumarins basic skeleton architecture,two UbiA prenyltransferases responsible for angular or linear coumarins biosynthesis,and five CYP736 cyclases involved in THP and THF ring ***,two bifunctional enzymes capable of catalyzing both demethylsuberosin and osthenol were identified for the first *** analysis implies that tandem and ectopic duplications of the CYP736 subfamily,specifically arising in the Apiaceae,contributed to the structural diversity of coumarins in ***,this study proposes a parallel evolution scenario for the complex coumarin biosynthetic pathway among different angiosperms and provides essential synthetic biology elements for the heterologous industrial production of coumarins.

关键词： Notopterygium incisum Parallel evolution Biosynthesis Pyranocoumarins Furanocoumarins