Analytical Methods
·
2022
·Vol. 15
·期 5
·648-654
·
IF 3.532
Luyao Zhao,Min Wang,Jiadong Wang,Jing Wu,Zhuoting Zhang,Xu Jing,Xiaowen Wang
A detection method of carbofuran (CBF) in water samples was reported using deep eutectic solvent (DES)-based dispersive liquid–liquid microextraction (DLLME) combined with digital image colorimetry (DIC), which was environmentally friendly, solvent-saving, rapid, and convenient. Under alkaline conditions, the green and multifunctional extractant DESs dissociated into linalool and heptanoic acid, and CBF was hydrolyzed to 2,3-dihydro-2,2-dimethyl-7-benzofuranol and further coupled with fast blue BB salt to form an azo derivative. Heptanoic acid led to the dispersion of linalool to extract the orange-red azo derivative; DIC was used for quantitative analysis using a smartphone with its associated ease of data-acquisition. This experiment optimized the types, molar ratios, and volumes of DESs and the amounts of sodium carbonate and sodium chloride. Under optimal conditions, the limits of detection (LOD) and quantitation (LOQ) were 0.024–0.032 mg L−1 and 0.081–0.108 mg L−1, respectively. The extraction recoveries in real samples (tap, pond, and river water) were 92.4–101.0% with a relative standard deviation below 4.6%. This method has successfully analyzed CBF in different water samples and shows prospects for the monitoring and control of CBF residues in other environmental samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zi-Hui Cai,Jian-Dong Wang,Lin Liu,Liu-Ding Ruan,Qi Gu,Xin-Yu Yan,Li-Na Fu,Peng-Quan Zhao,Su Zhang,Yu-Jie Fu
A green, novel and designable natural deep eutectic solvent-based supramolecular solvents/equilibrium solution (NADES-SUPRAS/EqS) was developed, which possesses better stability and free designability with a wider range of synthesis while compared to the typical alkyl carboxylic acid-based SUPRAS. The physicochemical properties and specific synthesis patterns of NADES-SUPRAS/EqS had been investigated. In addition, a more intelligent solvent regulated synthesis system had been developed to prepare corresponding supramolecular systems according to different polarity target phytochemicals through tailoring the components of synthetic NADES-SUPRAS/EqS. During the NADES-SUPRAS extraction of Zanthoxylum bungeanum Maxim. leaves (ZBML), 18 kinds of NADES were screened and the proportion of NADES as well as the ethanol content were varied tailor. After tailoring, all of the extracted chlorogenic acid, neochlorogenic acid, rutin, as well as 91.775 % of hyperin, 94.940 % isoquercetin and 84.405 % quercetin were distributed in the EqS phase while all of the hydroxy-α-sanshool (HAS) were distributed in the NADES-SUPRAS phase. Furthermore, NADES-SUPRAS/EqS extraction rate reached 9.741 mg/g, which were 7.604-fold, 2.352-fold, 1.141-fold, and 1.384-fold to that of water, ethanol, 70 % ethanol and methanol extraction, respectively. The excellent extraction and separation effects were due to the large number of hydrogen bonds and hydrophobic forces. Dynamic multi-stage countercurrent extraction combined with water and macroporous resin recovery enabled significant cost reductions and rapid recovery of chemical components and solvents. This novel solvent could be intelligently designed and be of great significance for the extraction of different polarity phytochemicals from plants.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Ruiyu Fu,Tingze Ren,Yanhui Zhang,Xiaoli Guo,Xin Di
This paper describes a sensitive, simple and green analytical method for pretreatment of sulfonylurea and pyrethroid herbicides in water samples by supramolecular solvent-based liquid phase microextraction (SUPRAS-LPME). The SUPRAS was rapidly formed by nonanoic acid and tetrahydrofuran (THF)/water solution. The attractive features of SUPRAS-LPME include the simplicity, high enrichment factor, low cost and less consumption of organic solvents. The main influencing factors including type and volume of fatty acids, volume of THF , ionic strength, vortex time and volume of formic acid were optimized in detail, and then the significant variables were optimized by Box-Behnken design (BBD). Under the optimized condition, the proposed method shows high precision (RSDs < 13.7 %), low limits of detection (0.5–10 μg L -1 ) and limits of quantitation (10–45 μg L -1 ), acceptable recovery (71.3 %-95.9 %). The proposed method was successfully applied for analysis of sulfonylurea and pyrethroid herbicides in water samples, making it an alternative analytical strategy for determination of trace analytes at the microgram per liter range with desirable sensitivity.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Zi-Hui Cai,Lin Liu,Qi Gu,Jian-Dong Wang,Guo-Sheng Liu,Quan Zhou,Xin-Yue Dong,Su Zhang,Yu-Jie Fu
In this study, a novel green natural deep eutectic solvent-based supramolecular solvent/equilibrium solution (NADES-SUPRAS/EqS) system was designed. The microstructure and formation processes were characterized, revealing the formation and extraction mechanism of this novel solvent. In combination with vortex-assisted extraction, NADES-SUPRAS/EqS was used to efficiently extract and enrich representative active ingredients of different polarities in Cajanus cajan (Linn.) Millsp leaves. The influencing factors, including auxiliary extraction methods, the type of NADES, the proportion of NADES and ethanol for synthesis, the solid-to-liquid ratio, and the vortex time, were then adjusted utilizing single-factor optimization and response surface methodology . Under ideal extraction parameters, the extraction rates obtained were higher than other conventional organic solvents and had an excellent enrichment effect with only 90 s of vortex-shaking. Ultimately, an integrated multi-stage counter-current extraction and recovery unit was developed, capable of reducing costs and easily recovering solvents and target compounds, exploring the possibility of large-scale applications in the industry. A complete set of extraction, isolation, and recovery from plant material to chemical components offers a new perspective for the development of a high-value industry for plant secondary metabolites .
✓ 已验证
产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2022
·Vol. 101
·期 2
·
IF 1.051
Zhimei Wang,Yuehuan Zhang,Qing Chen,Xin Xiao,Carl Redshaw
This study has selected the medium-chain saturated fatty acid pelargonic acid as the raw material for the first time, and added the surface catalyst Tween 80 to the aqueous solution to form pelargonic acid–Tween 80 composite vesicles by a surface tension method. The compound vesicle was used to encapsulate five heterocyclic drugs (cefazolin sodium, chlorpromazine hydrochloride, gemcitabine hydrochloride, metronidazole, and isoniazid), all of which have disadvantages when used directly, and the effects of the vesicles on the five kinds of drugs were evaluated in terms of encapsulation rate and the in vitro sustained release in a simulated artificial intestinal fluid environment. The results revealed that the pelargonic acid–Tween 80 composite vesicles exhibit an encapsulation efficiency above 45%, and that the encapsulated drugs achieve a cumulative release effect of 6–10 h in a simulated artificial intestinal fluid environment, and the cumulative release rate is above 35%. This study proves that pelargonic acid–Tween 80 composite vesicles can be used as a carrier for encapsulated drugs, and this can extend the time of action of the drugs. This research illustrates the potential for application of pelargonic acid in the field of medicine.
✓ 已验证
产品关联
DOI
高影响因子
Food Bioscience
·
2022
·
IF 5.318
Yaling Huang,Junwen Wan,Min Sun,Tao Feng,Qian Liu,Shiqing Song,Xiaoming Zhang,Chi-Tang Ho
The sensomics approach was applied to elucidate the flavor profile of Chinese steamed breads (CSBs) fermented by different fresh and dry yeast, respectively. The quantitative descriptive analysis (QDA) led to the establishment of seven sensory attributes. Results noted that fresh yeast CSBs were characterized by milk, bouquet, sweet, and sour attributes, while the corresponding dry yeast CSBs exhibited wheat and yeast attributes. According to OAVs ≥1, 34 aroma-active chemicals were shown to be significant odorants. Isoamyl alcohol, 2,3-butanediol, benzoic acid , acetoin, hexanal, and indole had a significant contribution to the different aroma profiles of dry and fresh yeast CSBs. The result of correlation analysis showed that 2,3-butanediol and benzoic acid were correlated with sweet, milk, and sour attributes, hexanal and indole were related to bouquet attribute, and acetoin was associated with flour. Further aroma recombination confirmed the contribution of these key components in flavor discrimination of CSBs. These results will provide guidance for the yeast-CSBs flavor evaluation, improvement, and quality control.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 46
·期 1
·2200671
·
IF 3.614
Zhibo Fu,Hongyang Zhang,Zhijun Zeng,Fanghong Ning,Ziwei Xu,Chenyu Liu,Min Zhang,Ping Hu
Short-chain and medium-chain fatty acids have plentiful biological functions, which play a crucial role in the diagnosis and therapy of many diseases. Herein, a new method for simultaneous quantifying 17 short-chain and medium-chain fatty acids with high-performance liquid chromatography coupled with an ultraviolet detector was developed and the pre-column derivatization by indole-3-acetic acid hydrazide was performed to improve the separation and detection. The conditions of the derivatization reaction were systematically investigated. Subsequently, the method was validated and the results showed a satisfactory linearity (linear regression coefficients > 0.9969), the limit of detection (4.0×10 −3 –1.9×10 −2 μmol/L), precision (0.9%–7.3% for intra-day and 2.0%–9.8% for inter-day), recovery (90.0%–109.1% with relative standard deviation <7.7%) and stability (0.1%–3.3% for standard solution and 0.2%–3.9% for fecal sample). Finally, the established method was successfully applied to quantify short-chain and medium-chain fatty acids in the feces of healthy control and diabetic rats. Eleven kinds of short-chain and medium-chain fatty acids were detected and six of them showed a significant difference between the control group and the model group.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2022
·Vol. 11
·期 11
·1661
·
IF 5.561
Ruijia Liu,Nan Qi,Jie Sun,Haitao Chen,Ning Zhang,Baoguo Sun
Fried pepper (Zanthoxylum bungeanumMaxim.) oil (FPO) is widely used in Chinese cuisine because of its unique aroma. To investigate the effects of different frying temperatures and different frying times on the volatile composition and odor characteristics of FPOs, descriptive sensory analysis (DSA), solvent-assisted flavor evaporation–gas chromatography–mass spectrometry (SAFE–GC–MS) and electronic nose (E-nose) were used to analyze the FPOs (FPO1–FPO4 represented the pepper oil fried at 110 °C, 120 °C, 130 °C, and 140 °C; FPO5–FPO7 represented the pepper oil fried for 10 min, 20 min and 30 min). The results showed that FPO3 and FPO6 had strong citrus-like and floral aromas and exhibited significant advantages in sensory attributes. A total of 46 volatile compounds were identified by SAFE–GC–MS; among them, FPO3 and FPO6 had a higher volatile compound content.β-Caryophyllene was detected in only FPO3 and FPO6; linalool was higher in FPO3 and FPO6, which might cause them to exhibit stronger floral and citrus-like aromas. The presence of (2E,4E)-2,4-decanedienal would be one of the reasons for the strong fatty aroma exhibited in FPO4 and FPO7. FPO3 and FPO6 were associated with citrus-like and floral aromas by partial least squares regression (PLSR) analysis, which agreed with the sensory evaluation results.Keywords:fried pepper oil;frying temperatures;frying times;GC–MS;odor;aroma profiles
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Jing Wang,Mengru Li,Hui Wang,Wenjing Huang,Fang Li,Lili Wang,Chi-Tang Ho,Yanyan Zhang,Liang Zhang,Xiaoting Zhai,Xiaochun Wan
Aroma extract dilution analysis was performed on volatile fractions extracted from a freshly prepared Dahongpao (DHP) tea infusion using solvent-assisted flavor evaporation, yielding 65 odor-active domains with flavor dilution factors ranging between 32 and 32,768. In addition, six aromatic substances were captured by headspace analysis. Quantitation of 54 compounds by an internal standard method and stable isotope dilution assays revealed that the concentrations of 32 odorants exceeded their respective orthonasal odor threshold values in tea infusion. The results of odor activity values (OAVs) suggested that 2-metylbutanal (malty) and γ-hexalactone (coconut-like) had the highest OAVs (248 and 154). Eight odorants including γ-hexalactone (OAV 154), methyl 2-methylbutanoate (59), phenylacetic acid (7.2), acetylpyrazine (5.7), 2-methoxyphenol (3.4), p-cresol (2.7), 2,6-diethylpyrazine (2.7), and vanillin (1.8) were newly identified as key odorants in DHP tea infusion. An aroma recombination model in a non-volatile matrix extracted from tea infusion satisfactorily mimicked the overall aroma of DHP tea infusion, thereby confirming the identification and quantitative experiments. Omission experiments verified the obvious significance of 6-methyl-5-hepten-2-one (OAV 91), 2-ethyl-3,5-dimethylpyrazine (19), 4-hydroxy-2,5-dimethylfuran-3(2H)-one (13), and acetylpyrazine (5.7) as key odorants for the special roasty and caramel-like aroma of DHP tea.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Ma Wenjing,Dai Shanshan,Li Xiaojiang,Hongsheng Lu
Oily wastes are easily generated in many processes of exploitation, solvent extraction is the common method for treating the oily waste. However, traditional solvent extractions are difficult to recycle the solvent, and oil is difficult to separated. As a low-volatility solvent, ionic liquid is simple in synthesis, low in cost, so it has good application prospect. In this work, the sustainable separation of oil from oily waste was implemented by using CO 2 -switchable ionic liquids. On the basis of solvent extraction, ionic liquids can reduced losses and costs. The CO 2 -switchable ionic liquids were prepared by poly (propylene glycol) bis(2-aminopropyl ether) D-230 and fatty acids with low volatility at the mole ratio of 1:2. Upon the alternate bubbling CO 2 and N 2, ionic liquids could be transformed alternately from water-miscible state to water-immiscible state. The water-immiscible state was bi-phasic system containing hydrophobic fatty acids and ammonium bicarbonate solution by bubbling CO 2 . Based on the bi-phasic system, the oil (kerosene, paraffin oil and crude oil) could be mixed with fatty acids, and were separated from fatty acids in the hydrophilic state upon N 2 , where the recovery rate of oil was more than 97% and fatty acids was not residual in recovered oil. Treating oily waste, the oil could be extracted from oily waste by the bi-phasic system. The ionic liquids were reused and the oil was separated by bubbling N 2 without extra additives, where the recovery rate of oil from oily waste was more than 85.57%. Due to the simplified process and negligible solvent loss, the economic benefit of recovering per barrel crude oil reached 76.7% of the price of crude oil. Compared with the existing technology , this sustainable separation is simpler, more economical and more environmentally friendly. Hence, it is expected that this sustainable separation based on CO 2 -switchable ionic liquids will meet the development of green separation with low-energy consumption.
✓ 已验证
产品关联
DOI
高影响因子
Friction
·
2022
·Vol. 11
·期 6
·911-926
·
IF 4.924
Yu Hongxiang,Chen Haijie,Zheng Zhiwen,Qiao Dan,Feng Dapeng,Gong Zhenbin,Dong Guojun
Nine organic compounds were utilized as model lubricants to investigate the impact of functional groups on tribological performances. Nonanoic Acid with carboxyl showed the best lubrication properties, and fluid film and tribofilm were coexistent in its friction test, bringing a low friction coefficient and wear rate. In addition, the lubricant with low friction coefficient corresponded to high adsorption energy in density functional theory (DFT) calculations. And the lubricant forming adsorption film with large surface energy displayed small wear rate in friction test. Moreover, adsorption energies positively correlated surface energies. Based on the experimental results, the action mechanism of functional groups on tribological properties of lubricants was proposed. Various functional groups make lubricant molecules show different adsorption energies and surface energies. Lubricant molecules with high adsorption energy are more likely to adsorb on substrates and form a vertical monolayer, which can maintain a regular molecular brush structure during friction and bring a low friction coefficient. And lubricant molecules with high surface energy may be more prone having tribochemical reactions during friction and forming protective tribofilm, which leads to a low wear rate.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 10
·1818-1826
·
IF 3.614
Yinghao Wang,Xianxie Zhang,Wenya Hu,Chenglong Dong,Dali Fu,Sara Girmay Habtegabir,Yehua Han
Free fatty acids are involved in many metabolic regulations in the human body. In this work, an ultra-fast screening method was developed for the analysis of free fatty acids using trapped ion mobility spectrometry coupled with mass spectrometry. Thirty-three free fatty acids possessing different unsaturation degrees and different carbon chain lengths were baseline separated and characterized within milliseconds. Saturated, monounsaturated, and polyunsaturated free fatty acids showed different linearities between collision cross-section values and m/z . The establishment of correlations between structures and collision cross-section values provided additional qualitative information and made it possible to determine free fatty acids which were out of the standards pool but possessed the confirmed linearity. The gas-phase separation made the quantitative analysis reliable and repeatable at a much lower time cost than chromatographic methods. The sensitivity was comparable to and even better than the reported results. The method was validated and applied to profiling free fatty acids in human plasma. Saturated free fatty acids abundance in the fasting state was found to be lower than that in the postprandial state, while unsaturated species abundance was found higher. The method was fast and robust with minimum sample pretreatment, so it was promising in the high-throughput screening of free fatty acids.
✓ 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）