FOOD CHEMISTRY
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2026
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IF 10.4
Liyu Hou,Haodong Wang,Lan Sun,Xinyuan Wang,Zhongping Huang,Huijun Liu,Jing Yu
4.71–5.19 μg/box and 1.27–1.40 μg/box were detected for the migrated PS MPs and NPs. • Hydrophilic iron oxide nanoparticle was used to capture polystyrene nanoplastics. • Adsorption mechanism includes hydrogen bonding, coordination, electrostatic interaction. • Quantification of PS MPs and PS NPs from lunch boxes by Py-GC/MS. • The aging effect causing the decomposition of PS MPs into PS NPs. In this study, 1 μm glass fiber membranes were used to enrich polystyrene microplastics (PS MPs), and then hydrophilic iron oxide nanoparticle (n-Fe 3 O 4 ) was used to capture the residual polystyrene nanoplastics (PS NPs), primarily through hydrogen bonding, coordination, and electrostatic interactions. MPs on membranes and NPs captured by n-Fe 3 O 4 were respectively determined by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The method was verified by adding PS MNPs standard to ultrapure water. The detection limit of this method was 0.16 μg/cup for PS MPs and 0.03 μg/cup for PS NPs. The absolute recovery rates of MPs and NPs were 99 ± 2% and 89 ± 3%, respectively. The test results of three batches of PS lunch boxes showed that the content of PS MPs attached on surfaces was 6.79–12.30 μg/box, and the content of PS NPs was 0.51–0.96 μg/box. The migrated PS MPs and PS NPs were 4.71–5.19 μg/box and 1.27–1.40 μg/box respectively.
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TALANTA
·
2025
·
IF 6.1
Peng Gan,Xin Zhang,Yu Wang,Qianru Zhou,Xiaoli Zou
The prevalence of carcinogenic N-nitrosamines formed as byproducts during water treatment was public health of significant concern. The salt-assisted liquid-liquid microextraction (SALLME) combined with gas chromatography-tandem Q-Exactive Orbitrap mass spectrometry, employing programmed temperature vaporization–large volume injection (PTV-LVI) was developed for the determination of sixteen N-nitrosamines. The Plackett-Burman Design and Response Surface Methodology were applied to optimize the PTV-LVI parameters and sample pretreatment procedures. The optimal SALLME conditions were 200 μL dichloromethane as extraction solvent, 30 % (w/v) sodium carbonate concentration, and 40 s extraction time. The optimized PTV-LVI injection volume of 5 μL demonstrated approximately one order of magnitude greater sensitivity compared to conventional 1 μL splitless injection. Under these optimized conditions, the proposed method exhibited linearity correlation coefficients between 0.9947 and 0.9998 for sixteen N-nitrosamines within the range of 0.2–100 μg/L, except for NDMA and NMEA, which showed corresponding correlation coefficients of 0.9937–0.9941 over a linear range of 0.5–100 μg/L. The method detection limits ranged from 1.6 to 4.6 ng/L. The relative recoveries for spiked tap water samples at concentrations of 20 ng/L, 50 ng/L and 100 ng/L ranged from 60.4 % to 113.4 %, with the relative standard deviation below 10 %. The proposed method offered a rapid, environmentally friendly and highly sensitive alternative analytical method for the determination of trace level of N-nitrosamines in drinking water.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Haihui Ren,Wen Xiao,Jiameng Han,Qiaorong Liu,Zunjian Zhang,Yuan Tian
Background Tracking changes in plasma concentrations of monosaccharides and sugar alcohols related to glycometabolism, which plays a role as the main source of energy, is of great significance for the treatment of metabolic diseases. However, analysis of monosaccharides and sugar alcohols has always been a difficult task due to the high polarity of the polyhydroxy structure and the presence of a large number of isomers. So far, no suitable method has been developed for simultaneous determination of monosaccharides and sugar alcohols in beagle plasma. Results This work performed an innovative gas chromatography-mass spectrometry method for the simultaneous chromatographic separation and absolute quantification of 11 monosaccharides and sugar alcohols associated with glycometabolism. After derivatization, monosaccharides converted to be oxime acetylated derivatives and sugar alcohols transformed into acetylated derivatives. All analytes achieved good separation after chromatographic conditions were optimized, especially the selection of mid-polarity capillary column(6% cyanopropyl phenyl and 94% dimethyl polysiloxane). The improvement of derivatization efficiency through single factor and response surface optimization ensured a high sensitivity, with LOQ of each analyte in the range of 0.2-50 ng/mL. The established method was fully validated in terms of linearity and range, sensitivity, accuracy and precision, recovery, matrix effect, stability, dilution integrity and proved to be reliable, which was applied to the comparative study on hypoglycemic effect of two antidiabetic agents with different pharmacological mechanisms, dorzagliatin and metformin, as well as possible metabolic pathways affected by them. Significance This method solves the problems of multiple peaks after derivatization and frequent co-elution of analytes in previous analytical methods, significantly enhances derivatization efficiency of ketoses, which provides a promising approach for simultaneous analysis of aldose, ketose, and sugar alcohol. It offers new insights into a more comprehensive research on glycometabolism rather than merely focusing on glucose.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yinghao Guo,Zhenyu Yuan,Haoting Zhang,Zhongming Guo,Fanli Meng
Industrial waste gas is the main force of environmental pollution, and its monitoring and control are particularly important. As a kind of chemical material and solvent commonly applied in industry, production and emissions of 2-butanone have been rising steadily year by year. It is particularly important for the detection of this gaseous substances. Spinel metal oxides have great potential in the field of gas detection, but the high calcination temperature of their synthesis often leads to the decrease of metal active sites on the surface and the loss of oxygen vacancies, which are not conducive to gas sensing performance. In this research, a hydrothermal method was adopted to synthesize In 2 O 3 nanospheres as hard templates, and the crystal structure of berry-like CdIn 2 O 4 was prepared at a low calcination temperature. The surface was enriched with an active site In. Gas-sensitive tests show that the CdIn 2 O 4 –2 step-500-based sensor has a sensitivity of 148 to 100 ppm 2-butanone gas and shows a low LOD (125 ppb) at 160 °C. The method in this paper not only provides a way to enhance spinel metal oxidation detection of 2-butanone gas, but also the prepared sensor has great application prospects in industrial monitoring.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Jianliang Sun,Lianghai Li,Guangying Zhou,Xue Wang,Liang Zhang,Yueping Liu,Jierui Yang,Xianghong Lü,Feng Jiang
The conventional flue gas treatment technologies require high capital investments and chemical costs, which limit their application in industrial sectors. This study developed a sulfur-cycling technology to integrate sulfide production by biological sulfur reduction and simultaneous catalytic desulfurization and denitrification with H2S (H2S-SCDD) for flue gas treatment and sulfur recovery. In a packed bed reactor, high-rate sulfide production (1.63 ± 0.16 kg S/m3-d) from biological sulfur reduction was achieved using organics in wastewater as electron donors at pH around 5.8. 93% of sulfide in wastewater was stripped out as H2Sg, which can be a low-cost reducing agent in the H2S-SCDD process. Over 90% of both SO2 and NO were removed by the H2S-SCDD process under the test conditions, resulting in the formation of sulfur. 88% of the input S (H2Sg and SO2) were recovered as octasulfur with high purity. Besides partial recycling to produce biogenic sulfide, excessive sulfur can be obtained as a sellable product. The integrated sulfur-cycling technology is a chemical-saving and even profitable solution to the flue gas treatment in industrial sectors with wastewater available.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Na Li,Xuankai Huang,Haiyan Zhang
Faradaic transition-metal-oxide/hydroxide (TMH) materials are critical for high-performance supercapacitors . However, the preparation of transparent micro-structured TMH electrodes is a great challenge and has become the bottleneck restricting the performance of transparent flexible supercapacitors . Here, Ni(OH) 2 nanosheets and amorphous FeOOH nanowires were simply synthesized as micro-structured transparent films through a scalable gas-liquid diffusion method at the air-solution interface. The microstructures are enwrapped in graphene shells (Ni@Gr-TF and Fe@Gr-TF) for increasing rapid 3D electron/ion transport pathways, alleviating the exfoliation and dissolution of active materials into the electrolyte, and extending the potential window of the FeOOH cathode to −1.25–0 V. An asymmetric transparent and flexible supercapacitor (ATFS) based on Ni@Gr-TF//Fe@Gr-TF exhibited a transmittance of 52.3% at 550 nm, a high specific capacity of 17.42 mF cm −2 at 0.2 mA cm −2 (one order higher than the maximum value reported for a transparent graphene membrane), an energy density of 0.67 mWh cm −3 based on the entire device (comparable with nontransparent devices) as well as a high capacity retention (85.1%) after a long cycle life of 20 000 cycles.
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ACS Sensors
·
2025
·
IF 9.1
Zhihua Zhao,Shuhan Chen,Huiqin Li,Lan Wu,Zhigang Shao,Qilin Zou,Zhikun Wang
Triethylamine (TEA) is a colorless organic liquid known for its high volatility that poses significant irritation to the human respiratory tract; meanwhile, TEA can be released from decaying fish, which can be monitored by a gas sensor. However, conventional TEA gas sensors typically require high operating temperatures, leading to a substantial energy consumption. To address food safety concerns and promote environmental sustainability, the advancement of a TEA sensor that works at room temperature is urgently needed. In our work, an FeWO4/f-MWCNTs-3 chemoresistive gas sensor was fabricated by the hydrothermal method, integrating FeWO4 with multiwalled carbon nanotubes treated with mixed acids (f-MWCNTs). The sensor demonstrates superior performance, owing to its elevated specific surface area, total pore volume, and synergistic effect of p–p heterojunctions. FeWO4/f-MWCNTs-3 demonstrates excellent reproducibility, moisture resistance, stability, a minimal detection threshold of 1 ppm, and relatively rapid response/recovery times of 15/63 s. It attains a 113% response at 100 ppm of TEA at 25 °C. The applicability of FeWO4/f-MWCNTs-3 for assessing fish freshness via TEA concentration analysis from pomfret fish stored at ambient temperature for 14 days was validated, indicating its significance in fish freshness detection methodologies. Additionally, the gas-sensing mechanism of this sensor was further explored using density functional theory (DFT).
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Energy Reports
·
2023
·
IF 5.2
Xingxing Ding,Qing You,Jianfa Wu,Jian Zhang,Jiawei Liu,Caili Dai,Ning Sun,Linan Wei,Yongpeng Sun
With high clay content in shale gas reservoir, the hydration is easy during hydraulic fracturing, which will affect the fracture conductivity and productivity of gas wells. The illite content of the Longmaxi formation shale in Yongchuan District is high (more than 80% of clay mineral content), and gas wells have a high productivity after fracturing and shut-in. However, the hydration effect mechanism of fracturing fluid on illite rich shale is not clear. Therefore, in this paper, core hydration experiments are performed for the illite rich shale reservoir. The water imbibition characteristic of near-fracture shale is obtained, and the micro-morphology and microfracture development characteristics of hydration are studied. Moreover, the hydration mechanism of near-fracture shale is then explored from the aspects of ion diffusion and mineral interlayer spacing variation. It is deduced that the fracturing fluid is spontaneously imbibed into small pores preferentially during well shut-in after fracturing. After the near-fracture shale is touched by water, some clay minerals peel and fall off from the fracture surface after hydration, accompanied by the development of microfractures. The interlayer spacing of clay minerals expands (smectite expands by 8.8% and illite 1.5%) after water immersion, and the ion diffusion occurs. The first 15 h is the rapid diffusion stage (surface effect), while the second 15 h is the stable rising stage (internal effect). This study systematically analyzes the hydration characteristics of near-fracture illite rich shale and reveals its hydration mechanism, which are crucial for the optimization of well shut-in time and exploitation system of shale gas reservoir after fracturing.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Pengkai Jin,Liu Yang,Zhongyi Sheng,Xinyue Chu,Dianhui Chen
An indium and copper-doped mordenite catalyst (InCu/MOR) was prepared and tested as a potential catalyst for high temperature NH 3 selective catalytic reduction (NH 3 -SCR) of NO x in the gas turbine . The InCu/MOR catalyst exhibited excellent catalytic activity (over 83 % NO x conversion) in the presence of 5 % H 2 O and 100 ppm SO 2 above 550 °C. A series of characterization (XRD, Py-TR, XPS, NH 3 -TPD, H 2 -TPR and in-situ DRIFTS) were applied to analyze the catalyst. The obtained results showed that the addition of indium promoted the formation of isolated Cu 2+ and more Brønsted acid sites, which could improve the tolerance to sulfur dioxide and inhibit the occurrence of high temperature ammonia oxidation side reactions. Meanwhile, the ammonia on InO + /In 2 O 3 sites was activated and reacted with the nitrate/nitrite species on the catalyst surface to form nitroammonium (NH 4 NO 3 /NH 4 NO 2 ), which was a short lived intermediate for NH 3 -SCR. The superior catalytic performance of InCu/MOR could attribute to these comprehensive effects.
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Frontiers in Microbiology
·
2023
·
IF 5.2
Wang Jun,Wei Bo-Cheng,Wang Xin,Zhang Yan,Gong Yun-Jin
Sweet cherries are popular among consumers, with a recent explosion in sweet cherry production in China. However, the fragility of these fruits poses a challenge for expanding production and transport. With the aim of expanding the product categories of sweet cherries that can bypass these challenges, in this study, we prepared sweet cherry juice fermented by three different lactic acid bacteria (LAB; Lactobacillus acidophilus, Lactobacillus plantarum, and Lactobacillus rhamnosus GG), and evaluated the growth, physiochemical, and aroma characteristics. All three strains exhibited excellent growth potential in the sweet cherry juice; however, Lactobacillus acidophilus and Lactobacillus plantarum demonstrated more robust acid production capacity and higher microbial viability than Lactobacillus rhamnosus GG. Lactic acid was the primary fermentation product, and malic acid was significantly metabolized by LAB, indicating a transition in microbial metabolism from using carbohydrates to organic acids. The aroma profile was identified through integrated analysis of electronic nose (E-nose) and headspace gas chromatography–ion mobility spectrometry (HS-GC–IMS) data. A total of 50 volatile compounds characterized the aromatic profiles of the fermented juices by HS-GC–IMS. The flavor of sweet cherry juice changed after LAB fermentation and the fruity odor decreased overall. Lactobacillus acidophilus and Lactobacillus plantarum significantly increased 2-heptanone, ethyl acetate, and acetone contents, bringing about a creamy and rummy-like favor, whereas Lactobacillus rhamnosus GG significantly increased 2-heptanone, 3-hydroxybutan-2-one, and 2-pentanone contents, generating cheesy and buttery-like odors. Principal component analysis of GC–IMS data and linear discriminant analysis of E-nose results could effectively differentiate non-fermented sweet cherry juice and the sweet cherry juice separately inoculated with different LAB strains. Furthermore, there was a high correlation between the E-nose and GC–IMS results, providing a theoretical basis to identify different sweet cherry juice formulations and appropriate starter culture selection for fermentation. This study enables more extensive utilization of sweet cherry in the food industry and helps to improve the flavor of sweet cherry products.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Fengsong Liu,Chenghao Li,Caiwei Liu,Jialin Zheng,Kaiyue Bian,Hong Bai,Yan Zhang,Yifang Cao,Yijia Xie,Xinglong Xiao
The widespread utilization of the polyvinyl alcohol (PVA) film is significantly hindered by two prominent limitations: water sensitivity and low gas permeability. In this work, a novel PVA film coated with monoglyceride (MG) and filled with diatomaceous earth (DS) was fabricated to address these issues. Scanning electron microscopy and 3D morphology revealed that the Ra value improved from 3.72 to 7.21 μm. Also, the successful coating of MG was confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Pull-off adhesion tests proved that the film containing 0.5 g of MG exhibited the highest adhesive properties. The PVA/MG/DS film had the highest contact angle of 122.32°, the lowest water vapor permeability of 7.19 g/m2/day, and the lowest oxygen permeability of 55.35 (cm3 × cm × cm2 × s × Pa)−1. Moreover, this type of film exhibited higher light transmittance, better thermal stability, and greater mechanical properties than pure PVA film. Consequently, the PVA/MG/DS film displayed superior performance in preserving the freshness and quality of fresh-cut mango, with a lowest weight loss of 4.48%, a lowest total soluble solids of 7.98%, a greatest titratable acidity of 0.88%, a highest ascorbic acid of 76.67 mg/100 g, and best sensory quality.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2023
·Vol. 103
·期 15
·7631-7642
·
IF 4.1
Dongshuang Liang,Haosong Wen,Yaxuan Zhou,Taohong Wang,Guangqun Jia,Zongyan Cui,Adan Li
Background Honey aroma is one of its most important properties and it depends on the qualitative and quantitative composition of the volatile compounds. The volatile profile of honey could reveal its botanical origin to avoid a false characterization. Thus, it is of great significance to honey authentication. This study developed and validated a headspace solid-phase microextraction and gas chromatography–mass spectrometry (HS-SPME-GC–MS) method for simultaneous qualitative and quantitative analyses of 34 volatile components in honey. The developed method was applied to 86 honey samples from six different botanical origins, including linden honey, rape honey, jujube honey, vitex honey, lavender honey and acacia honey. Results The volatile fingerprints and quantitative results were simultaneously obtained by using the full scan and selected ion monitoring (SCAN+SIM) MS scanning mode. The limits of quantification (LOQs) and limits of detection (LODs) of 34 volatile compounds were in the ranges of 1–10 ng/g and 0.3–3 ng/g, respectively. And the spiked recoveries ranged between 70.6% and 126.2%, with the relative standard deviations (RSDs) not higher than 45.4%. A total of 98 volatile compounds were found with relative contents determined, and the 34 volatile compounds were determined with absolute concentrations. Based on the volatile fingerprints and the contents of volatile compounds, honey samples from six botanical origins were well classified by principal component analysis and orthogonal partial least-squares discrimination analysis. Conclusions The HS-SPME-GC–MS method was successfully applied to achieve the volatile fingerprints of six types of honey and to quantitatively analyze 34 volatile compounds with satisfying sensitivity and accuracy. Chemometrics analysis showed significant correlations between honey types and volatiles. These results reveal the characteristics of volatile compounds in six types of unifloral honey and provide some supports for honey authentication. © 2023 Society of Chemical Industry.
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危险品化学品经营许可证（带存储）