INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Dan Huo,Xipeng Zhang,Jiaxin Wei,Jinhua Wang,Qiang Zhang,Qiulin Yang,Hongxiang Zhu,Fengshan Zhang,Guigan Fang,Ting Wu
The toxic volatile organic compounds (VOCs), especially formaldehyde (FA), released from decoration materials pose a great threat to human health. In this study, formaldehyde adsorption performance of the specially formulated nanocellulose/chitosan aerogel (CNFCA) was investigated in simulated atmosphere. The physicochemical property of the composite aerogel was characterized, which had a large specific surface area (153.67 m 2 /g), a rough surface and an ultra-thin and porous structure. The composite aerogel showed excellent adsorption capacity for the formaldehyde, its theoretical maximum adsorption capacity was as high as 83.89 mg/g, and the adsorption process was more in accordance with the pseudo-second-order kinetics. The chromogenic reaction between the 4-amino-3-benzo-5-mercapto-1,2,4-triazolium (AHMT) and CNFCA was found that the color of the composite aerogel was depended on the free formaldehyde concentration. Based on this phenomenon, a colorimetric card was proposed and built to detection the formaldehyde in the atmosphere. Moreover, the adsorption mechanism research was found that the CNFCA with a multilayer structure belonged to physicochemical complex adsorption.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
PubMed
高影响因子
Analytical Methods
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2020
·Vol. 12
·期 24
·3130-3136
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IF 2.596
Xiangyu Feng,Jiaying Zhang,Jing Wang,Ailing Han,Guozhen Fang,Jifeng Liu,Shuo Wang
In the synthesis of metal nanoclusters (NCs), small molecules are widely used as capping ligands and reducing agents. However, metal NCs are usually sensitive to solvents and aerobic atmosphere and are also prone to oxidation; thus, their photonic properties deteriorate. In this work, 4-aminothiophenol (PATP) was used as a ligand to prepare Cu NCs and their fluorescence, morphology, and electronic states were characterized. The as-prepared Cu NCs could be dispersed in aqueous media and their fluorescence was sensitive to Hg2+. It was found that after mixing Cu NCs with 2,3-dialdehyde cellulose (DAC) prepared via oxidation by NaIO4, the fluorescence stability of Cu NCs could be enhanced from overnight to 7 days. This might be due to the reaction of the amine group of PATP with the aldehyde group of DAC to form Schiff bases, which are then reduced to form more stable C–N bonds via reduction by NaBH4. Therefore, Cu NCs were attached to a rigid skeleton and their stability increased. Furthermore, the composite of Cu NCs mixed with DAC could be used to prepare colorimetric cards for the rapid detection of Hg2+ with high sensitivity.
研究领域:
纳米技术
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分析化学
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材料科学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Quanliang Li,Xiaomeng Wang,Jing Ren,Ping Chen,Dayong Ren
Rapid and reliable quantification of meat freshness is crucial for consumer health and food safety. In this study, two simple and portable photosensitive colorimetric cards were fabricated for rapid on-site detection of meat freshness. The colorimetric cards were prepared by dispersing Rose Bengal (RB) into sodium acetate-acetic acid and sodium citrate-citric acid buffer systems containing 3,3′,5,5′-tetramethylbenzidine (TMB) and fixed on filter paper, respectively. The hue of the colorimetric cards was intimately correlated with the amount of volatile base nitrogen absorbed from meat, by which the quality of the meat can be visualized qualitatively. Correlation analysis of total volatile basic nitrogen (TVB-N), red: blue ratio (R/B), total color difference (ΔE), and response sensitivity (S%) demonstrated the accuracy of the proposed colorimetric cards. Principal component analysis (PCA) revealed that the first two principal components of the photosensitive colorimetric cards explained 95.4 %, 93.2 %, 92.9 %, and 87.8 % of the variance of sodium acetate-acetate colorimetric card, and 73 %, 87.9 %, 87.1 %, and 92 % of sodium citrate-citric card, respectively, which allowed for a clear differentiation of meat freshness including freshness, sub-freshness, and spoilage. The prepared photosensitive colorimetric cards can accurately reflect meat quality within 4 min. The proposed colorimetric cards are expected to be a prospective universal platform for on-site accurate quantification of meat freshness.
研究领域:
食品安全
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分析化学
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传感器
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比色检测
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光化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Shuangshou Wang,Haili Wang,Yuwen Ding,Wenzhi Li,Hongrui Gao,Zongpeng Ding,Peng Lin,Jing Gu,Mingfu Ye,Tingxuan Yan,Hongmei Chen,Jin Ye
Herein, a robust instrument-free point-of-care tests (POCTs) strategy was proposed for rapid naked-eye detection of artificial food colorants (AFCs) using filter paper as a sampling and response device. Indicator papers were prepared by one-step polycondensation of silane coupling agents onto glass microfiber filter papers, then colorimetric cards with fine color mappings to AFCs concentration gradients were handily fabricated by AFCs extraction with indicator papers via electrostatic interaction and hydrophobic effect. The lowest concentration for AFCs visual detection was as low as 10 −6 M and the whole POCTs process could be finished within 1 min. Furtherly, color information (RGB and gray-scale values) of AFCs-stained indicator papers and colorimetric cards from smartphone APP was used to reconstruct digitized colorimetry and reinforce its validity by mitigating the possible errors from subjective judgement on colors. Finally, such a dual-mode POCTs strategy was experimentally proved to be highly reliable for rapid visual detection of three AFCs (brilliant blue, Allura red, and sunset yellow) in real drinks by contrast with several instrumental methods like spectrophotometry, HPLC and MS. Due to its fine portability, speediness, low cost and user-friendliness, this strategy paves a promising way for AFCs-related food safety control.
研究领域:
食品科学
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分析化学
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即时检测
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Yuqing Qin,Aroosha Faheem,Yonggang Hu
The excess residues of fluoride ions cause serious human health problems, making their detection highly valuable. In this work, a whole-cell-based biosensor was presented for the detection of fluoride ions, which can inhibit the color reaction of 3,3′,5,5′,-tetramethylbenzidine (TMB) catalyzed by the CotA-laccase of spore surface. This reaction for the detection of fluoride ions could be read out through UV–vis spectrophotometer, smartphone, or standard colorimetric card within 10 min. Under optimum conditions, a linear range of 1–600 μmol L –1 with a detection limit of 0.12 μmol L –1 (3σ/k) was achieved for fluoride ions detection by using UV–vis spectrophotometer. The biosensor coupling with smartphone had a good linear response to fluoride ions concentration in the range of 5–600 μmol L –1 with LOD of 0.90 μmol L –1 (3σ/k). The standard colorimetric card can be directly used for recognizing the fluoride ions level via naked-eyes. A portable kit based on a colorimetric card and smartphone was developed and has been successfully applied for fluoride ions monitoring in surface waters and groundwater. This developed method has several advantages such as rapid, outstanding selectivity and anti-interference, low-cost, ease of operation and storage, and eco-friendliness, meeting the demands of point-of-care testing of fluoride ions and disease prevention.
研究领域:
环境科学
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分析化学
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生物技术
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DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2022
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IF 12.545
Lei Wang,Ai Xu,Jing Yuan,Fan Jiang,Meixuan Li,Wuzhen Qi,Yanbin Li,Jianhan Lin
An hourglass-mimicking biosensor was developed to detect target bacteria in 15 mL centrifugal tube using immune magnetic nanobeads to isolate the target from large-volume sample, [email protected] nanozymes to label the target for amplification of biological signals, and a microplate reader/colorimetric card for determination of the target. First, a centrifugal tube with an iron ball framework was first coaxially assembled in the center of a Halbach ring magnet. After immune magnetic nanobeads, [email protected] nanozymes and bacterial sample were mixed by repeated bottom-up of the tube using a stepper motor , nanobead-bacteria-nanozyme complexes were formed. Then, colorless H 2 O 2 -TMB was catalyzed by the nanozymes to produce blue TMBox. The color change was finally analyzed using the microplate reader or colorimetric card to determine bacterial concentration . This hourglass-mimicking biosensor could separate ∼95% targets from 10 mL bacteria sample and detect targets from 1.6 × 10 1 to 1.6 × 10 6 CFU/mL in 1.0 h with low detection limit of 16 CFU/mL.
研究领域:
生物技术
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生物传感器
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微生物学
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分析化学
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DOI
PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2023
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IF 2.9
You Quan Shi,Zhao Xu,Le Wang,Kang Wang,Li Xu,Heng Zheng
It is particularly meaningful to therapeutic drug monitoring (TDM) of mycophenolic acid (MPA) for transplant patients to maximize the drug efficacy and minimize the adverse effect. In this study, a novel fluorescence and colorimetric dual-readout probe was put forward to fast and reliable detect MPA. The blue fluorescence of MPA was largely enhanced in the presence of poly (ethylenimine) (PEI), while the red fluorescence of [email protected] 2 (silica-coated CdTe quantum dots) provided a reliable reference signal. Hence, combining PEI 70,000 and [email protected] 2 , a fluorescence and colorimetric dual-readout probe could be constructed. For fluorescence measurement of MPA, the linearity was obtained in the MPA concentration range of 0.5–50 μg/mL, with a limit of detection (LOD) of 33 ng/mL. For the visual detection, the fluorescent colorimetric card was established in the MPA concentration from 0.5 to 50 μg/mL corresponding to the fluorescence color from red to violet and then to blue, which could be used for semi-quantification. Furthermore, in the light of the ColorCollect APP by the smartphone, the ratio of blue and red brightness values was linear with the MPA concentration from 1 to 50 μg/mL; thus, quantification of MPA could be realized by APP with the LOD of 83 ng/mL. The developed method was successfully applied to the analysis of MPA in the plasma samples of three patients after oral administration of mycophenolate mofetil , which was the prodrug of MPA. The result was comparable to those obtained by the clinically widely-used enzyme multiplied immunoassay technique. The developed probe was fast, cost-effective and operational convenience, and possessed high potential for TDM of MPA.
研究领域:
分析化学
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临床化学
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药学
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生物医学工程
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）