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Research on Determination of Nitrogen Content in Petroleum Using mid-infrared spectroscopy

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China Petroleum Processing & Petrochemical Technology 2011年第4期13卷 1-7页

作者： Li Jingyan Chu Xiaoli Tian Songbai Lu Wanzhen (SINOPEC Research Institute of Petroleum Processing, Beijing 100083) SINOPEC Research Institute of Petroleum Processing Beijing 100083 China

Nitrogen content is an important parameter for petroleum refining processes. The combined use of mid-infrared attenuated total reflection spectroscopy and multivariate calibration allows accurate determination of nitrogen content in petroleum and its products. The calibration models of nitrogen content in crude oils have been established by partial least squares (PLS) method. The results predicted by this method were very close to those determined by standard methods. Compared with standard methods, this method is provided with advantages such as high-speed, simplicity and good-repeat- ability without any needs for pretreatment.

关键词： petroleum mid-infrared spectroscopy partial least square nitrogen

Test on oxygen and benzene contents in gasoline by mid-infrared spectroscopy

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Journal of Measurement Science and Instrumentation 2013年第3期4卷 299-301页

作者：姜旭峰赵媛莉校云鹏孙静 Department of Material and Oil Air Force Logistics College

This paper aims at testing oxygen and benzene contents in gasoline by mid-infrared *** experimental results prove that infrared spectroscopy(IR)is *** with gas chromatography(GC)technology,this paper draws a conclusio... 详细信息

关键词： oxygen benzene mid-infrared spectroscopy gasoline gas chromatography(GC)CLC number:TN219 Document code:AArticle ID:1674-8042(2013)03-0299-03

DETERMINATION OF TOTAL SUGAR CONTENT IN CHINESE RICE WINE BY mid-infrared spectroscopy AND CHEMOMETRICS

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DETERMINATION OF TOTAL SUGAR CONTENT IN CHINESE RICE WINE BY...

Identification of lambda-cyhalothrin residues on Chinese cabbage using fuzzy uncorrelated discriminant vector analysis and MIR spectroscopy

亚洲精细农业与计算机农业应用联合大会

作者： Fei Shen Yibin Ying College of Biosystems Engineering and Food Science Zhejiang university 268 Kaixuan Street Hangzhou 310029 People’s Republic of China

In this study, mid-infrared spectroscopy combined with chemometrics was used to determine total sugar content in Chinese rice wine. A total of 30 samples were collected. Calibration models were developed in the range of 1000 cm-1 to 1500 cm-1 and 2500 cm-1 to 3000cm-1 to exclude the influence of water absorption. Stepwise multiple regression （SMLR）, principal component regression （PCR） and partial least squares regression （PLSR） were used to develop the model in TQ analyst software. Also derivative pretreatment method was used to test the impact of accuracy of the models established. The best model was obtained by PLSR with second-order derivative pretreatment. The correlation coefficient of cross validation （rcv） is 0.984, RMSECV to 0.765 g/L, RPD to 5.75. The result in this study indicates that mid-infrared （MIR） spectroscopy, combined with chemometric methods, can be used as a fast, simple and exact method to measure total sugar content in Chinese rice wine.

关键词： Chinese rice wine mid-infrared spectroscopy MIR total sugar content

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International Journal of Agricultural and Biological Engineering 2022年第3期15卷 217-224页

作者： Xiaohong Wu Tingfei Zhang Bin Wu Haoxiang Zhou School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina High-tech Key Laboratory of Agricultural Equipment and Intelligence of Jiangsu Province Jiangsu UniversityZhenjiang 212013JiangsuChina Department of Information Engineering Chuzhou PolytechnicChuzhou239000AnhuiChina Research Institute of Zhejiang University-Taizhou Taizhou 317700ZhejiangChina

Excessive pesticide residues on Chinese cabbage will be harmful to people’s ***,an identification system was designed for qualitative analysis of lambda-cyhalothrin residues on Chinese cabbage *** order to extract discriminant information from mid-infrared(MIR)spectra of Chinese cabbage effectively,fuzzy uncorrelated discriminant vector(FUDV)analysis was proposed by introducing the fuzzy set theory into uncorrelated discriminant vector(UDV)*** this system,the Cary 630 FTIR spectrometer was used to scan four samples of Chinese cabbage with different concentrations of *** MIR spectra were preprocessed by standard normal variable(SNV)and Savitzky-Golay smoothing(SG).Next,the high-dimensional MIR spectra were processed for dimension reduction by principal component analysis(PCA).Furthermore,UDV,FUDV,and some other discriminant analysis algorithms were used for feature extraction,***,the K-nearest neighbor(KNN)classifier was employed to classify the *** experimental results showed that when FUDV was used as the feature extraction algorithm,the identification system reached the maximum classification accuracy of 100%.The results indicated that FUDV combined with MIR spectroscopy was an effective method to identify lambda-cyhalothrin residues on Chinese cabbage.

关键词： Chinese cabbage mid-infrared spectroscopy fuzzy uncorrelated discriminant vector uncorrelated discriminant vector lambda-cyhalothrin residues

Rapid Detection of Accelerants in Fire Debris Using a Field Portable mid-infrared Quantum Cascade Laser Based Analyzer

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Open Journal of Applied Sciences 2023年第5期13卷 746-757页

作者： Hao Huang Yongfeng Zhang Fuqiang Dai Xiaobo Yan Altayeb Hamdalnile Liyun Wu Tingting Zhang Haowen Li Frank Inscore Shanghai Fire Research Institute of MEM Shanghai China Micro Optical Instruments Shenzhen China Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei China University of Science and Technology of China Hefei China

Arson presents a challenging crime scene for fire investigators worldwide. Key to the investigation of suspected arson cases is the analysis of fire debris for the presence of accelerants or ignitable liquids. This study has investigated the application and method development of vapor phase mid-infrared (mid-IR) spectroscopy using a field portable quantum cascade laser (QCL) based system for the detection and identification of accelerant residues such as gasoline, diesel, and ethanol in fire debris. A searchable spectral library of various ignitable fluids and fuel components measured in the vapor phase was constructed that allowed for real-time identification of accelerants present in samples using software developed in-house. Measurement of vapors collected from paper material that had been doused with an accelerant followed by controlled burning and then extinguished with water showed that positive identification could be achieved for gasoline, diesel, and ethanol. This vapor phase mid-IR QCL method is rapid, easy to use, and has the sensitivity and discrimination capability that make it well suited for non-destructive crime scene sample analysis. Sampling and measurement can be performed in minutes with this 7.5 kg instrument. This vibrational spectroscopic method required no time-consuming sample pretreatment or complicated solvent extraction procedure. The results of this initial feasibility study demonstrate that this portable fire debris analyzer would greatly benefit arson investigators performing analysis on-site.

关键词： Quantum Cascade Laser (QCL) mid-infrared spectroscopy Fire Debris Analysis Gasoline Vapor Detection Ignitable Liquids

Single-shot mid-infrared incoherent holography using Lucy-Richardson-Rosen algorithm

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Opto-Electronic Science 2022年第3期1卷 1-8,I0001页

作者： Vijayakumar Anand Molong Han Jovan Maksimovic Soon Hock Ng Tomas Katkus Annaleise Klein Keith Bambery Mark J.Tobin Jitraporn Vongsvivut Saulius Juodkazis Optical Sciences Center and ARC Training Centre in Surface Engineering for Advanced Materials(SEAM) School of ScienceComputing and Engineering TechnologiesOptical Sciences CenterSwinburne University of TechnologyHawthornMelbourneVictoria 3122Australia Institute of Physics University of Tartu50411 TartuEstonia infrared Microspectroscopy(IRM)Beamline ANSTO-Australian SynchrotronClaytonVictoria 3168Australia Tokyo Tech World Research Hub Initiative(WRHI) School of Materials and Chemical TechnologyTokyo Institute of Technology2-12-1OokayamaMeguro-kuTokyo 152-8550Japan

In recent years,there has been a significant transformation in the field of incoherent imaging with new possibilities of compressing three-dimensional(3D)information into a two-dimensional intensity distribution without two-beam interference(TBI).Most of the incoherent 3D imagers without TBI are based on scattering by a random phase mask exhibiting sharp autocorrelation and low cross-correlation along the ***,during reconstruction,high lateral and axial resolutions are *** based on scattering requires an astronomical photon budget and is therefore precluded in many power-sensitive *** this study,a proof-of-concept 3D imaging method without TBI using deterministic fields has been demonstrated.A new reconstruction method called the Lucy-Richardson-Rosen algorithm has been developed for this imaging *** believe that the proposed approach will cause a paradigm-shift in the current state-of-the-art incoherent imaging,fluorescence microscopy,mid-infrared fingerprinting,astronomical imaging,and fast object recognition applications.

关键词： imaging holography mid-infrared spectroscopy incoherent optics computational optics mid-infrared imaging