MEASUREMENT
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2024
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IF 5.2
Yanyan Wang,Kaikai Zhang,Shengzhe Shi,Qingqing Wang,Chun Wang,Sheng Liu
To better utilize the spectral features of near-infrared and visible light and address issues in traditional suspension particle size detection, such as long measurement cycles, high costs, and complex operation, we propose a new method that combines multispectral sensor characterization technology with machine learning algorithms for rapid particle size measurement. By integrating a lab-designed light source driving circuit and spectral data acquisition device, we obtained 15 spectral data points for visible light, near-infrared, and red–blue–green (RGB) values to build a prediction model. The near-infrared-based model obtained a coefficient of determination (R 2 ) of 0.9130, whereas models combining RGB-near-infrared and visible-near-infrared features performed best, with R 2 values of 0.9670 and 0.9845. These models improved performance by 5.91% and 7.83%, effectively overcoming the limitations of single spectral features in different suspensions. This combination of visible and near-infrared light with machine learning proves effective for detecting average particle size in suspensions.
研究领域:
光学检测
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机器学习应用
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Bin Chen,Jun Ma,Tong Yang,Lin Chen,Peng Fei Gao,Cheng Zhi Huang
A facile one-pot method was proposed to synthesis cysteamine capped CdTe QDs with a high quantum yield 30%. In the synthesis process, nitrogen protection, ultrasonic treatment, and light irradiation were unnecessary. Additionally, potassium tellurite was used instead of Te powder as Te source, avoiding of the time-consuming Te powder dissolution process . The prepared QDs were found to be Hg 2+ sensitive. The detection linear range for Hg 2+ was from 5 to 300 nM, and the detection limit was calculated to be 1 nM. The detection mechanism was mainly ascribed to the electron transfer from cysteamine capped QDs to Hg 2+ , resulting in a fluorescence quenching phenomenon. In addition, we developed a portable RGB sensing gadget with the QDs as fluorescence probe for Hg 2+ detection, and the linear range was from 5 to 200 nM. Furthermore, the gadget was applied for Hg 2+ detection in tap water sample. The results showed that the average recoveries in real tap water sample were in the range from 97.2% to 115.3%, which indicated that accuracy and precision were satisfactory for practical application requirements.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
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IF 4.6
Min Sun,Xujie Wang,Lingwei Bu,Yawen Fan,Zihan Guo,Yingying Shan,Xiao Zhu,Lei Hu,Zhengquan Yan
Herein, a novel Bi 3+ -doped Au-Ag quantum dot (Bi 3+ -Au-Ag QD) system was synthesized, by homogeneous reduction method using AgNO 3 , Bi(NO 3 ) 3 ·5 H 2 O and HAuCl 4 ·4 H 2 O as raw materials, for multi-channel detection of S 2− in agricultural foods. Owing to the strong interaction between S 2− and the Ag/Au components, trace amounts of S 2− led to the formation of Ag 2 S or Au 2 S sulphides on the surface of the Bi 3+ -Au-Ag QDs. This surface modification altered the intrinsic fluorescence property of QDs, and their catalytic ability to the oxidization of colourless 3,3′,5,5′-tetramethylbenzidine (TMB) into its blue oxide (oxTMB), resulting in noticeable changes in spectral responses, colour and RGB values. Under optimised experimental conditions, Bi 3+ -Au-Ag QDs were employed successfully for ‘turn-on’ fluorescence, UV–vis and smartphone-assisted red-green-blue (RGB) detection of S 2− in real agricultural food samples. The limits of detection –4.75 × 10 −10 , 6.48 × 10 −9 and 7.22 × 10 −9 mol·L −1 respectively, well met the safety threshold set by the World Health Organization.
研究领域:
分析化学
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纳米技术
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食品安全
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环境监测
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光学传感
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Jianrong Guo,Juan Wu,Junhui He,Yan Xue
As cadmium ions (Cd 2+ ) pose a serious threat to environment and human health, it is significant to develop portable, fast-response and sensitive Cd 2+ sensors for both real-time and on-site collection of such critical information. In this study, nearly monodisperse ZnS nanoparticles (NPs) were prepared and used to recognize, enrich and detect Cd 2+ ions. ZnS NPs demonstrated fast adsorption kinetics towards Cd 2+ ions (removing 99.3 % of Cd 2+ in 12 min), surpassing previously reported multiple Cd 2+ adsorption materials. Upon adsorbing Cu 2+ and Cd 2+ ions via substitution reaction, ZnS NPs gain strong peroxidase activity, and demonstrate the ability to selectively detect Cu 2+ and Cd 2+ ions among common metal ions . By further conjugating with our previous HSnS NFs (Hollow SnS nanoflower) nanosensor to eliminate the interference of Cu 2+ , the ZnS NPs nanosensor could selectively detect Cd 2+ ions with recoveries above 80 %. The ZnS NPs nanosensor can cover a wide range of Cd 2+ concentration from 0.5 to 100 μg L −1 with an extremely low detection limit of 0.38 μg L −1 . When coupling to a portable RGB sensor, as low as 0.5 μg L −1 Cd 2+ ions could be reached on-site for river water, giving an outstanding recovery of 99.4 %. The current results provide a new avenue to the on-site detection of Cd 2+ ions, and would doubtlessly contribute to the future construction of portable and intelligent sensor arrays towards complex environmental samples.
研究领域:
环境科学
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分析化学
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纳米技术
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）