LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Xia Yin,Jian'an Huang,Jing Huang,Wenliang Wu,Tong Tong,Shujuan Liu,Lingyun Zhou,Zhonghua Liu,Shuguang Zhang
Hunan black tea is well-known for its floral-honey aroma, but the volatile components responsible for the fragrance have not been elucidated yet. In this study, the volatile compounds in Hunan black tea were identified and quantified by the headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS). The results showed that 88 compounds were extracted and determined in Hunan black tea, including the dominant components Geraniol, phenethyl alcohol, phenylacetaldehyde, linalool, nonanal and other 5 aromatic compounds. Furthermore, the aroma-active compounds were identified by odor activity value (OAV). It was found that 24 aroma compounds, including geraniol with an OAV≥1 were regarded as the primary active aromatic compounds in Hunan black tea. Finally, partial least squares (PLS) regression analysis was employed and results revealed that Nonanal, trans -nerolidol, benzyl alcohol, and phenylethanol exhibit a positive correlation with the intensity of floral and sweet honey aromas. Overall, this study identified the volatile compounds responsible for the dominant floral-honey aroma in Hunan black tea.
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DOI
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2021
·Vol. 45
·期 3
·e15267
·
IF 2.19
Yuan-Hui Wang,Jing-Wen Zhao,Fei Xu,Qi-Dong Zhang,Zhi-Lu Ai,Bo-Yu Li
The volatile compounds of Jiaozi-steamed breads (JSBs) fermented by Jiaozi starters from eight regions in China were extracted using simultaneous distillation and extraction (SDE) and headspace solid-phase microextraction and determined using gas chromatography-mass spectrometry (GC-MS). 1-Hexanol, 3-methyl-1-butanol, phenylethyl alcohol, benzaldehyde, naphthalene, ethanol, acetic acid, and n -hexadecanoic acid were the main volatiles of JSBs. Principal component analysis exhibited that the volatiles of JSBs from Nanyang City, Xi'an City, and Zhumadian City was negatively correlated to that of other five JSB samples. Cluster analysis demonstrated that the volatile characteristics of JSBs from Heze City, Minqin County, Taian City, Weinan City, and Yuncheng City belonged to a category, and the JSBs of Nanyang City, Xi'an City, and Zhumadian City were different from other five JSBs. It demonstrated that the volatile components of steamed breads in North China and South China were different. Practical applications From this study, it can be seen that simultaneous distillation and extraction (SDE) can completely extract volatile compositions of steamed breads fermented by Chinese traditional starter “Jiaozi.” SDE/GC-MS was suitable for the analysis of JSBs volatile composition. The relative contents of 1-hexanol, 3-methyl-1-butanol, phenylethyl alcohol, benzaldehyde, naphthalene, ethanol, acetic acid, and n -hexadecanoic acid in JSBs were at high level, and their contents could be used as a marker to identify JSBs. The volatile compositions of JSBs made of Jiaozi starters from Heze City, Minqin County, Taian City, Weinan City, and Yuncheng City were similar. However, JSBs of Nanyang City, Xi'an City, and Zhumadian City were different from other five JSBs. The volatile components of steamed breads in North China and South China were different, which reflected the difference in dietary habit in the southern and northern areas of China.
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DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2020
·
IF 4.982
Wenbin Li,Yongfeng Zhu,Shuirong Li,Yi Lu,Jida Wang,Keming Zhu,Jinlei Chen,Yunwu Zheng,Zhifeng Zheng
Analytical pyrolysis-comprehensive two-dimensional gas chromatography/mass spectrometry (Py-GC × GC/MS) was employed for the on-line analysis of cellulose via catalytic pyrolysis with different catalysts and catalytic temperatures to study the products and aromatic hydrocarbons selectivity. The catalysts were subjected to characterization methods, including XRD , TEM , NH 3 -TPD, to investigate the effects of the physicochemical properties of the catalyst on the product distribution. Results showed that the Ce 0.8 Zr 0.2-x Al x O 2 could significantly promote the formation of aromatic hydrocarbons under 400–550 °C. A lower catalytic temperature (≤350 °C) favored the formation of furan compounds, and a higher catalytic temperature (≥450 °C) supported the formation of aromatic hydrocarbons. The relative peak area of the aromatics prepared by using the Ce 0.8 Zr 0.15 Al 0.05 O 2 catalyst was the highest being 85.24% at 550 °C. Moreover, the selectivity of the single-ring aromatics, such as benzene, toluene and xylene, were significantly affected by the presence of the Ce 0.8 Zr 0.2-x Al x O 2 catalysts. The higher total acidity of Ce 0.8 Zr 0.15 Al 0.05 O 2 favored the formation of benzene and toluene. Additionally, the Ce 0.8 Zr 0.15 Al 0.05 O 2 catalyst had a great thermal stability. The catalyst recycling tests showed that the Ce 0.8 Zr 0.15 Al 0.05 O 2 catalyst can be reused five times to produce aromatic-rich bio-oil via catalytic fast pyrolysis .
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DOI
高影响因子
JOURNAL OF FOOD BIOCHEMISTRY
·
2019
·Vol. 44
·期 1
·e13088
·
IF 1.358
Xiao Tian,Sen Guo,Shanshan Zhang,Peisheng Li,Tianyi Wang,Chi-Tang Ho,Min-Hsiung Pan,Naisheng Bai
The seeds of tree peony ( Paeonia ostii ) are promulgated as emerging edible oil crops. However, biological properties of principal constituents of peony seeds were not well studied. Fifteen main constituents including suffruticosols A and B, trans -ε-viniferin, ampelopsin E, resveratrol, trans -resveratrol-4′- O -β- d -glucopyranoside, paeoniflorin, luteolin, luteolin-4′- O -β- d -glucopyranoside, apigenin, kaempferol, oleanic acid, betulinic acid, hederagenin, and caffeic acid were isolated and identified. Their cytotoxicity against human tumor cell lines (COLO205, HT-29, HepG2, AGS, and HL-60) were evaluated. Among them, trans -ε-viniferin showed the most potent cytotoxicity against HL-60 cells (IC 50 5.6 μM); ampelopsin E exhibited the most obvious antiproliferative properties on COLO205 (IC 50 78.1 μM) and HT-29 (IC 50 4.2 μM) cells, and betulinic acid showed the strongest growth inhibitory effects on HepG2 (IC 50 6.6 μM) and AGS (IC 50 5.4 μM) cells. Three enzymes (tyronsinase, α-glucosidase, and acetylcholinesterase) inhibitory activities of 12 compounds were also screened. Stilbene compounds, especially suffruticosols A and B, showed a significant inhibitory activity on all three enzymes. Practical applications The cytotoxicity of 15 main constituents from peony seeds against COLO205, HT-29, HepG2, AGS, and HL-60 cells were evaluated. Among them, trans -ε-viniferin showed the most potent cytotoxicity against HL-60 cells (IC50 5.6 μM); ampelopsin E exhibited the most obvious antiproliferative properties on COLO205 (IC50 78.1 μM) and HT-29 (IC50 4.2 μM) cells, and betulinic acid showed the strongest growth inhibitory effects on HepG2 (IC50 6.6 μM) and AGS (IC50 5.4 μM) cells. Collectively, these results suggested that Paeonia ostii seed (POS) extracts are potential candidates for anticancer agents.
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DOI
PubMed
高影响因子
Food Analytical Methods
·
2018
·Vol. 11
·期 9
·2628-2635
·
IF 2.245
Qin Guofu,Zou Keting,Tian Li,Li Yongbo
An efficient and sensitive analytical method for the simultaneous determination of five plant growth regulators (PGRs) has been successfully developed, including 3-Indoleacetic acid (IAA), 2-Naphthylacetic acid (2-NAA), Beta-indolebutyric acid (IBA), 2-(2,4-dichlorophenoxy), acetic acid (2.4-D), and 4-Chlorophenoxyacetic acid (4-CPA) in bean sprouts. Using 10% boron trifluoride of methanol as the derived reagent and the reaction was derivatized at 70 °C for 30 min, the derivatives of five PGRs have been completely separated within 19 min. It has a linear relationship in the concentration range of 0.01–0.20 mg/kg and the correlation coefficients ( r 2 ) in excess of 0.997. The average recoveries were ranged from 72.7–98.6% at three spiking different concentration levels of 0.05, 0.10, and 0.15 mg/kg, respectively. The relative standard deviations (RSDs) were ranged from 1.2 to 9.0%. The limits of detection and the limits of quantification were ranged from 0.00024 to 0.00172 mg/kg and 0.0008–0.0052 mg/kg, respectively. On the basis of these, the measurement has been successfully applied to the analysis of the exogenous phytohormones in the bean sprouts. Except for 4-CPA and IAA, the rest of the analytes were undetected in samples. In sum, the current method can be used for accurate determination and confirmation of PGRs in many other crops, such as bean sprouts.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2014
·
IF 4.517
Juan Zheng,Siyan Li,Ying Wang,Lei Li,Chengyong Su,Hong Liu,Fang Zhu,Ruifen Jiang,Gangfeng Ouyang
A superior solid-phase microextraction (SPME) fiber-coating material, IRMOF-3@ILs/PDMS, was prepared by the in situ growth of IRMOF-3 onto stainless-steel wires and protection with ionic liquids (ILs) and polydimethylsiloxane (PDMS). The ILs can efficiently prevent the substantial cracking of IRMOF-3 caused by moisture, and a thin PDMS film can protect the IRMOF-3@ILs material to achieve a much better extraction efficiency as well as excellent resistance to high temperature and high humidity. This IRMOF-3@ILs/PDMS coating possessed a porous structure, a rough surface and an increased lifespan (by at least 100 times) compared with that of IRMOF-3. The coating was evaluated by analyzing four polycyclic aromatic hydrocarbons (PAHs) in water, and good precision (<7.7%), low detection limits (12.0–15.4 ng L −1 ), and wide linearity (50–20,000 ng L −1 ) were achieved under the optimized conditions. The fiber was successfully applied to the sensitive analysis of PAHs in rainwater by coupling it with gas chromatography–mass spectrometry (GC–MS).
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Journal of Food Measurement and Characterization
·
2019
·Vol. 14
·期 1
·535-547
·
IF 1.415
Al-Dalali Sam,Zheng Fuping,Sun Baoguo,Chen Feng,Wang Peng,Wang Wenping
Zhengrong vinegar is one of the renowned popular condiments in China, which has been consumed around Hebei province for about 136 years. Its different processing steps are considered as important and critical steps that are responsible for the generation of representative flavors besides the acetic acid. An HS-SPME coupled with GC–MS method was used to evaluate the changes of the volatiles of the vinegar that were generated during the different processing steps including before adding salt (BAS), after adding salt (AAS), after filtration (AF) and final product (FP). In addition, aroma-active volatiles of the final vinegar product were characterized by GC-O coupled with detection frequency technique (modified frequency, MF%) that is a combination of aroma intensity and aroma frequency values that can be used to improve the description of a reliable data from GC-O. Among the 42 detected volatiles, 38 of them were positively identified by their corresponding authentic compounds. Besides, 24 volatiles were recognized as aroma-active volatiles. On the other hand, the content of individual volatile groups was decreased along with the continuation of the fermentation process from the BAS step to FP step, except the aldehydes group that displayed a slight increase. Of which, 2-pentylfuran and ethyl heptanoate disappeared in the AF and FP samples. The main contributors to the Zhengrong aroma profile that had MF (%) > 80 included isovaleric acid, 2-acetoxy-3-butanone, hexanoic acid, ethyl hexanoate, 3-(methylthio)propyl acetate, decanal and 2-phenyl-2-butenal, while the volatile compounds that had a middle MF in a range between 70 and 80 were 2-methylbutanoic acid, tetramethylpyrazine, nonanal, 1,2-dimethoxybenzene, 4-ethylphenol, ethyl benzoate, ethyl benzeneacetate, 2-phenylethyl acetate and 4-ethylguaiacol.
研究领域:
食品科学
·
分析化学
·
风味化学
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高影响因子
PHARMACEUTICAL CHEMISTRY JOURNAL
·
2020
·Vol. 54
·期 2
·154-161
·
IF 0.538
Ying-Jiao Liu,Li-Juan Xie,Lan Xiao,Li-Min Gong,Ta-Si Liu,Nai-Hong Chen
Cinnamomum camphora Chvar. Borneol (CCCB) and Cinnamomum camphora Chvar. Cineol (CCCC) are two different chemical types of C. camphora . The clinical application of these chemical types of CC shows big differences, but sometimes they are confused because of the similarity of morphological features. To identify the two types of CC and to analyze the differences of compositions, their morphological characteristics were investigated by microscopic techniques and the chemical components were determined by GC-MS analysis and GC internal standard method. Distinguishing features of morphological characteristics were the shape, petiol, gland, and smell. Microscopic study of the transverse sections of leaves showed 13 – 15 columns xylem vessel in the leaves of CCCB, 11 – 13 columns xylem vessel, and more obvious and thicker cell walls of fiber cells in the leaves of CCCC. From this research, GC-MS analysis of essential oil of the leaves could provide mainly differential characteristics to distinguish between CCCB and CCCC. The total of 33 compounds were identified in the essential oil of CCCB leaves and the main component was d -borneol (55.11%), while d -borneol in CCCC leaves was not the main component and the amount of d -borneol might be related to the microstructure of gland. L(-)-camphor and d-borneol were quantitatively analyzed by GC with FID detector, using methyl salicylate as the internal standard. Each gram of the total essential oil contains 0.68 g of d -borneol in CCCB, and each gram of the total essential oil contains 0.150 and 0.015 g of L(-)-camphor in CCCB and CCCC, respectively, from Hunan province. Other habitats showed the same trend. This research was aimed to establish a method based on the microscopic, GC-MS, and GC techniques to identify and quantify CCCB and CCCC compositions, for providing scientific data to ensure with accuracy the origin of CCCB and CCCC plant material.
研究领域:
植物学
·
药物分析
·
中药学
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高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-11
·
IF 3.998
Zhou You,Qin De Qiang,Zhang Pei Wen,Chen Xiao Tian,Liu Ben Ju,Cheng Dong Mei,Zhang Zhi Xiang
Azadirachtin exhibits excellent bioactivities against several hundred arthropods. However, current knowlege of its biochemical effect on B . dorsalis larvae is not deep enough. In this study, integrated LC-MS and GC-MS-based untargeted metabolomics were used to analyze the changes of endogenous metabolites and the biochemical effects of azadirachtin on B . dorsalis larvae. Azadirachtin has excellent bioactivities against B . dorsalis larvae in this study, leading to a longer developmental duration, lower survival rate, and low pupa weight. The effect of azadirachtin was investigated on a total of 22 and 13 differentially abundant metabolites in the LC–MS and GC–MS-based metabolomics results, are selected respectively. Pathway analysis indicated that 14 differentially enriched metabolic pathways, including seven influential pathways, are worthy of attention. Further integrated key metabolic pathway analysis showed that histidine metabolism, d -glutamine and d -glutamate metabolism, biotin metabolism, ascorbate and aldarate metabolism, pentose and glucuronate interconversions, and alanine, aspartate and glutamate metabolism in B . dorsalis larvae are significantly relevant pathways affected by azadirachtin. Although extrapolating the bioactivity results in this study to the practical project of B . dorsalis pest management in the field has limitations, it was found that azadirachtin has a significant effect on the primary metabolism of B . dorsalis larvae.
研究领域:
昆虫学
·
代谢组学
·
植物化学
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PubMed
高影响因子
JOURNAL OF FOOD QUALITY
·
2018
·
IF 0.841
Chenggang Cai,Yibin Ying,Pinggu Wu,Jun Tang,Liyuan Wang,Tan Ying
A detection method for 3 kinds of phenolic compounds of endocrine disruptors (4-nonylphenol, 4-octylphenol, and bisphenol A) in infant milk powders by solid-phase extraction combined GC-MS was established. This method can effectively remove interference materials from infant milk powder products. The limit of detection and the limit of quantitation of the 3 kinds of compounds were 0.8 μg/kg and 2.5 μg/kg, respectively, with the relative standard deviations of 4.3–12.1%. The recovery rates of 4-nonylphenol, 4-octylphenol, and bisphenol A were of 68.5–89.2%, 64.8–87.0%, and 97.8–110.0%, respectively. Concentrations of the bisphenol A were from 0.8 to 14 μg/kg in 35 samples of the total 60 samples. And the other two compounds of 4-nonylphenol and 4-octylphenol were not found in all the 60 samples tested. The established method is simple, rapid, accurate, and highly sensitive, and the pollution of endocrine disruptors in some infant milk powders products was detectable in trace amounts.
研究领域:
分析化学
·
环境科学
·
食品科学
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高影响因子
Water Quality Research Journal
·
2017
·Vol. 52
·期 2
·90-98
·
IF 0
Xu Ming,Gui Lei,Peng Shu-Chuan,Chen Tian-Hu,Wang Ji-Zhong
A method for determination of chlorophenols (CPs) in sediments was developed using ultrasonic solvent extraction followed by solid-phase extraction, derivatization, and gas chromatography–mass spectrometry (GC-MS) analysis. Some effective operational details and parameters on mixing of samples and extraction solvent, adsorption loss, and extraction cycles of the derivatives were studied and optimized. The calibration curves of standard solutions were observed in the range of 0.5–100 μg L −1 and correlation coefficients ranged from 0.998 to 0.999. The limits of detection (LOD s ) for individual CPs are in the range of 0.026–0.072 ng g −1 . The method showed good performance with the recovery efficiencies of target CPs in spiked sediment at 73.2–105.6%. In addition, the feasibility of applying the proposed method to determine the concentration of CPs in field core sediment samples collected in three shallow lakes in Eastern China was examined. The obtained results show that the present method is a sensitive, simple, low cost and highly feasible method for determination of CPs in sediment samples.
研究领域:
环境分析化学
·
环境污染
·
有机污染物检测
·
沉积物化学
·
水质科学
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DOI
CHROMATOGRAPHIA
·
2018
·Vol. 82
·期 3
·683-693
·
IF 1.401
Shen Chen,Wu Tong,Zang Xiaohuan
In this work, a zeolitic imidazolate framework-based graphene oxide composite (ZIF-8@GO) was prepared and used as the adsorbent in hollow fiber stir bar sorptive extraction. The stir bar was constructed of a small section of hollow fiber filled with 5 mg ZIF-8@GO and a thin stainless wire of 1.5 cm long in its lumen, and used to extract the trace levels of phthalate esters from children’s food samples prior to gas chromatography–mass spectrometric detection. The ZIF-8@GO showed a high adsorption efficiency for the compounds containing aromatic rings. The main experimental parameters that can impact the extraction efficiency including extraction temperature, extraction time, stirring rate, sample salinity, and desorption conditions were investigated. Under the optimized conditions, the limits of detection (LODs) for the five phthalate esters (diethyl phthalate, dipropyl phthalate, diisobutyl phthalate, butylbenzyl phthalate, and di(2-ethylhexyl) phthalate) were 0.15–0.6 µg L −1 for CiCi beverage and pear juice samples, and 0.75–2.2 µg kg −1 for jam samples. The limits of quantitation (LOQs) were 0.5–2.0 µg L −1 for CiCi beverage and pear juice samples, and 2.5–7.5 µg kg −1 for jam samples. Wide linear ranges of 0.5–500.0 µg L −1 and 2.5–2000 µg kg −1 were obtained for CiCi beverage, pear juice samples and jam samples, respectively, with good repeatability (RSD < 11%) and high method recoveries (72%–100%). The lifetime test results showed that the ZIF-8@GO-based hollow fiber stir bar can be reused for 120 extraction cycles without a significant loss of extraction efficiency, indicating its high durability and stability. The established method was applied successfully for the determination of the phthalate esters (PAEs) in children’s food samples. Graphical abstract
研究领域:
分析化学
·
食品安全
·
环境毒理学
·
暴露科学
·
食品化学
·
污染物检测
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DOI
高影响因子
危险品化学品经营许可证（带存储）