ANALYTICA CHIMICA ACTA
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2022
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IF 6.911
Shanshan Sun,Shujuan Wang,Shanshan Li,Liping Wei,Xiaohan Wang,Yizhou Wang,Bing Li,Yang Hu,Liangsheng Wang
Phytosterols exhibit a wide range of pharmacological activities and have no side-effects, which have attracted more and more attention. In this study, two pre-treatment methods (alkaline hydrolysis and acid-alkali hydrolysis) were performed in parallel for the first time to investigate the effects on phytosterol analysis. The aim is to develop an analytical method for phytosterols in pollen and anther wall of tree peony ( Paeonia ostii ‘Fengdan’) by gas chromatography-mass spectrometry. The result indicated that the contents of phytosterols in pollen (3390.02 mg/100 g DW) and anther wall (929.70 mg/100 g DW) of P. ostii ‘Fengdan’ were relatively high. Meanwhile, eleven phytosterols were identified, among which five phytosterols were first identified in tree peony pollen. Moreover, the effects of wall breaking and different developmental stages on phytosterol contents of pollen and anther wall of P. ostii ‘Fengdan’ were also discussed. The result showed that wall breaking was beneficial to sterol detection of pollen, but not necessary for anther wall. For the best harvest time, the stage of S2 had the highest content of phytosterols. In conclusion, this study successfully establishes an analytical method for phytosterols by gas chromatography-mass spectrometry, and lays a foundation for the development and utilization of pollen and anther wall of P. ostii ‘Fengdan’ in functional foods and pharmaceutical industry .
研究领域:
植物学
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药理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure & Risk Assessment
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2023
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IF 2.9
Xing Li,Yongyan Ji,Tiehong Zu,Xuezhe Huang,Jing Wang,Yanzhong Cao,Zongyan Cui
A method was developed for simultaneous determination of cyanide and thiocyanate in milk by gas chromatography-tandem quadrupole mass spectrometry (GC-MS/MS). Cyanide and thiocyanate were derivatized with pentafluorobenzyl bromide (PFBBr) as PFB-CN and PFB-SCN, respectively. Cetyltrimethylammonium bromide (CTAB) was employed both as a phase transfer catalyst and a protein precipitant in the sample pretreatment, which facilitates the separation of the organic and aqueous phases, and greatly simplifies the pretreatment procedures to achieve simultaneous and rapid determination of cyanide and thiocyanate. Under the optimized conditions, the limits of detection (LODs) of cyanide and thiocyanate in milk were 0.006 mg/kg and 0.015 mg/kg, and the spiked recoveries ranged from 90.1% to 98.2% and from 91.8% to 98.9% with relative standard deviations (RSDs) less than 18.9% and 15.2%, respectively. The proposed method was validated as a simple, fast and highly sensitive method for the determination of cyanide and thiocyanate in milk.
研究领域:
分析化学
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食品安全
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2019
·Vol. 20
·期 16
·3875
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IF 4.183
Meng Pan,Qicheng Lei,Ning Zang,Hong Zhang
The discovery of medicinal plants is crucial for drug development.Eucalyptus globulusleaves are used as a traditional medicine in many areas of world due to herbicidal and insecticidal activity. While natural products are difficult to be separated and activity assayed, a new approach is needed to predict the active ingredients therein. In this study, a new method for screening active compounds extracted fromE. globulusleaves was developed by GC-MS/MS and UPLC-MS/MS combined with molecular docking technology. Predicted compounds with high activity were proposed. Firstly, 35 volatile compounds and 34 aqueous extracted compounds were extracted fromE. globulusleaves, and identified by GC-MS/MS and UPLC-MS/MS. The herbicidal receptor (1BX9) was then docked with the identified compounds by docking software, evaluated by docking models and seven scoring functions. The results showed that gallic acid had a strong inhibitory activity of 1BX9, which was speculated to be the main reason for the inhibitory effect ofE. globulusleaves. Finally, allelopathic tests of gallic acid, citric acid, and isopulegol were carried out on grass seeds to verify its inhibitory activity against herbicide receptor 1BX9. The results show that the method can screen compounds with specific activity from a complex system of medicinal plants, which is very important for the screening of new active ingredients, confirmation of new medicinal ingredients, and the in-depth development of animal and plant medicines.Keywords:Eucalyptus globulus;GC-MS/MS;UPLC-MS/MS;molecular docking;allelopathic test
研究领域:
植物化学
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药物开发
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生物信息学
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DOI
高影响因子
Journal of Analytical Methods in Chemistry
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2021
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IF 2.193
Guanjun Nan,Lina Zhang,Zhengzheng Liu,Yu Liu,Yan Du,Hongwen Zhao,Hongxia Zheng,Rong Lin,Guangde Yang,Shaohua Zheng
Eupatorium fortunei Turcz. is a widely used Chinese herbal medicine in China. In this study, a gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS) method was developed and validated to simultaneously determine the contents of p-cymene, thymol, neryl acetate, and β-caryophyllene in roots, stems, and leaves of Eupatorium fortunei Turcz. harvested at different growth periods. All four constituents could be detected in leaves, three could be detected in stems except β-caryophyllene, and only thymol could be detected in roots. The order of the total contents of four constituents in different parts was leaves > stems > roots. It indicated that the leaves could be the proper medicinal parts of Eupatorium fortunei Turcz. The content of four constituents in leaves varied a lot among different growth periods and showed an M-shaped change trend with the growth of Eupatorium fortunei Turcz. The four constituents accumulated to the highest values in early July followed by mid-September. Accordingly, the best harvest time of Eupatorium fortunei Turcz. is early July and mid-September.
研究领域:
药用植物学
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分析化学
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植物科学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
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2018
·Vol. 185
·期 8
·1-11
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IF 5.705
Lu Chunxia,Tang Zonggui,Gao XiaoXu,Ma Xiaomei,Liu Changbin
Magnetic dummy molecularly imprinted polymers (MDMIPs) were prepared by combining the surface imprinting technique with computer simulation for selective recognition of phthalate esters (PAEs). A computational study based on the density functional theory was performed to evaluate the template–monomer geometry and interaction energy in the prepolymerization mixture. The MDMIPs were characterized by transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometry, X-ray diffraction, and Fourier transform infrared spectroscopy. They exhibited (a) high saturation magnetization of 53.14 emu g −1 (leading to fast separation), and (b) large adsorption capacity, fast binding kinetics, and high selectivity for PAEs. Subsequently, a molecularly imprinted solid-phase extraction procedure followed by GC-MS was established for selective extraction and determination of 10 PAEs in food samples. Under the optimal experimental conditions, the response (peak area) was linear in the 0.5–100 ng mL −1 concentration range. The limits of detection ranged from 0.15 to 1.64 ng g −1 . The method was applied to the determination of PAEs in spiked real samples. The recoveries for 10 PAEs from various foods were in the range of 73.7%–98.1%, with relative standard deviations of 1.7%–10.2%.
Magnetic dummy molecularly imprinted polymers (MDMIPs) were prepared and successfully were applied as a special sorbent for the selective recognition and fast enrichment of 10 PAEs from different complex matrix.
研究领域:
分析化学
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食品科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
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2018
·Vol. 53
·期 8
·1992-2005
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IF 2.383
Huifan Liu,Fan Gong,Fashan Wei,Furao Lai,Xiaoyuan Zhang,Hui Wu
Summary Four types of carbohydrates, including Dendrobium officinale polysaccharide, Dendrobium aphyllum polysaccharide and β-glucans from yeast and barley, were examined, and their structures were found to mainly contain 1,4-linked-β- d -Glc p . Artificially simulated gastrointestinal digestion was conducted to characterise the changes of molecular weight, reducing sugars and released free monosaccharides by high-performance liquid chromatography, kits and the newly developed gas chromatography (GC)-mass spectrometry (MS)/MS analysis, which indicated that high molecular weight and complex spatial structures contributed to delayed monosaccharide release following exposure to digestive solution. The spatial structures of carbohydrates were changed during gastric digestion, but their primary structures were destroyed during intestinal digestion. Additionally, for the developed 7890A/7000 GC-TQ/MS-MS, the new analytical method was successfully used to analyse very low concentrations of monosaccharides in the simulated gastrointestinal digestive system.
研究领域:
食品科学
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分析化学
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营养学
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产品关联
DOI
高影响因子
TALANTA
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2019
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IF 4.916
Tian-Tian Ma,Xiao-Fang Shen,Cheng Yang,Hai-Long Qian,Yue-Hong Pang,Xiu-Ping Yan
Covalent organic framework TpBD was grafted on stainless steel wire with polydopamine as a linker. The fabricated TpBD bonded stainless steel wire was used as the solid-phase microextraction fiber to extract sixteen polycyclic aromatic hydrocarbons (PAHs) for subsequent GC-MS/MS determination in grilled meat samples. The developed method gave the limits of detection ( S/N = 3) from 0.02 (pyrene)-1.66 (naphthalene) ng L −1 and enhancement factors from 1069 (naphthalene)-10879 (benz(a)anthracene). The relative standard deviations (RSDs) for intra-day and inter-day study are in the range of 2.6%–8.5% and 4.5%–9.4%, respectively. The fiber-to-fiber RSDs for three parallel prepared fibers were 5.3%–10.0%. One TpBD bonded fiber can stand at least 200 cycles without significant loss of extraction efficiency. The developed method was successfully applied for the determination of trace PAHs in grilled meat samples with recoveries from 85.1% to 102.8%.
研究领域:
分析化学
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食品科学
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DOI
高影响因子
Food Chemistry-X
·
2026
·
IF 9.2
Sinian Chen,Daomin Liu,Peng Zhang,Peifeng Zhu,Wenhong Tan,Lu Liu
Metapanax delavayi is widely consumed as a vegetable and herbal tea in western China; however, the impact of postharvest drying on its chemical composition and bioactivity remains insufficiently characterized. In this study, the effects of three drying methods-shade drying (SD), hot-air drying (HAD), and vacuum freeze-drying (VFD)-on the metabolite profile and antioxidant activity of M. delavayi were systematically investigated using UHPLC-Q-TOF-MS and GC–MS/MS-based untargeted metabolomics, combined with multivariate statistical analysis and KEGG pathway enrichment. A total of 742 non-volatile and 87 volatile differential metabolites were detected across the drying treatments, indicating pronounced processing-induced metabolic alterations. KEGG enrichment analysis revealed that the differential metabolites were mainly associated with flavonoid biosynthesis, amino acid metabolism, galactose metabolism, and glycolysis/gluconeogenesis. Antioxidant assays (DPPH, ABTS, hydroxyl radical scavenging activity, and FRAP) demonstrated significant differences among drying methods, with VFD-treated samples generally exhibiting higher antioxidant capacity. Correlation analysis suggested that phenolic and flavonoid metabolites were major contributors to antioxidant activity. Overall, compared with SD and HAD, VFD showed a greater capacity to preserve phytochemical composition and antioxidant potential. These findings provide a scientific basis for optimizing drying strategies and improving the quality of M. delavayi -derived products.
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Lining Pan,Yaqiong Qin,Mantang Chen,Huimin Liu,Shaofeng Liu,Xuehui Sun,Xiaoyu Wang,Li Chen,Fuwei Xie,Huapeng Cui,Tao Wang,Ruihong Liu,Peijian Sun
Comprehensively characterising the flavour composition of essential oils (EOs) is critical due to its wide application in food , cosmetics and medicine industries. The present research aims to obtain accurate identification and quantification of 592 flavours in EOs from different plant sources using parallel dual-column gas chromatography-tandem mass spectrometry (GC-MS/MS). A strategy based on retention index distribution was introduced to simplify the optimisation process of separation distribution on the dual columns and elution distribution within the analysis process for analytes. Each analyte was identified as a unique and resolved peak through the complementary separation capacity of dual columns and the specific monitoring ability of the MS/MS transitions. To improve the accuracy of quantitative analysis, a combination of 1,2-octanediol, 1,2-nonanediol, 1,2-tetradecanediol, and phytantriol was used as analyte protectants (APs) for matrix effect compensation. The addition of APs effectively eliminated the differences in the peak response of the same analyte in pure solvent and EO samples from different plant sources. The proposed method demonstrated good linearity with correlation coefficient values above 0.999 for 72.5% analytes, high sensitivity with limit of quantifications below 10 ng/mL for 77.7% analytes, good accuracy with recoveries between 80% and 120% for 97.3% analytes, and high repeatability with relative standard deviations between 0.1% and 10.0% for 96.6% analytes at all three spiked levels. Compared to GC/MS in analysis of marigold, lavender , and fennel oils, this parallel dual-column GC-MS/MS method is a much more reliable and powerful tool for accurately identifying and quantifying ultra-multi-target flavours in EOs, which is critical for fully characterising their flavour composition, precisely controlling the quality of EO materials and further developing a new flavouring technology.
研究领域:
食品科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF DAIRY SCIENCE
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2025
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IF 4.4
Die Li,Yutong Cui,Na Luo,Zixuan Guo,Jiyong Li,Fuhai Min,Jiliang Zhang
Fermented milk is the daily products facing many challenges, including natural flavor, good texture, and more health. In this study, the Leuconostoc mesenteroides and Saccharomyces cerevisiae were employed as the auxiliary fermenters to solve the challenge. After the fermentation, both cow fermented milk and yak fermented milk showing comprehensive fruit flavors, and the GC-MS/MS demonstrated that the generation of 19 kinds of volatile compounds including ester, ketone, aldehyde, and acid are major contributor and mainly provide fruit, flowers, and coconut flavor. Such as isoamyl acetate and ethyl caprylate, increased by 164.20 ± 8.04 µg/kg and 115.53 ± 13.49 µg/kg in ME after the addition of auxiliary fermenters. Meanwhile, the concentration of off-volatile compounds decreased or degradation by the fermentation with auxiliary fermenters, such as 3-methyl-2-butenal (roasted flavor). At the same time, the fermented milk participated with the auxiliary fermenters improve the texture, especially in firmness increasement by 1.28% and 27.7% for ME and YE, respectively. The result of scanning electron microscope also proofed that protein network was thicker with smaller gaps and larger clusters fermented by auxiliary than that of the control. The milk fermented participated with auxiliary increase the water holding capacity by 73.33% and 98.47% for ME and YE, respectively. And the total acceptance than that of the control.
研究领域:
食品科学
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乳品技术
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微生物学
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风味化学
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生物技术
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营养学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）