A5101767044- Spectroscopy and Chemometric Analyses
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Spectroscopy Techniques in Biomedical and Chemical Research
- Metabolomics and Mass Spectrometry Studies
- Pesticide Residue Analysis and Safety
- Analytical chemistry methods development
- Water Quality Monitoring and Analysis
- Pharmacological Effects and Assays
- Plant-based Medicinal Research
- Enzyme Production and Characterization
- Insect and Pesticide Research
- Traditional Chinese Medicine Analysis
- Recycling and Waste Management Techniques
- Polymer Nanocomposites and Properties
- Biochemical and biochemical processes
- Protein Hydrolysis and Bioactive Peptides
- Enzyme Catalysis and Immobilization
- Biofuel production and bioconversion
- Phytochemistry and Biological Activities
- Medicinal Plants and Neuroprotection
- Phytase and its Applications
- Petroleum Processing and Analysis
- Phytoestrogen effects and research
- Fiber-reinforced polymer composites
China Tobacco
2012-2023
Baotou Medical College
2023
Shandong Institute of Metrology
2021
China North Industries Group Corporation (China)
2014
China Agricultural University
2011-2014
Harbin Institute of Technology
2010
The aroma components in tobacco were extracted by simultaneous distillation and extraction, analyzed gas chromatography/mass spectrometry. An automated mass spectral deconvolution identification system (AMDIS) was used to analyze the data from full scan mode. AMDIS could effectively resolve problem of matrix interference, low concentrations complex samples, help remove interference overlapping components. In studying 132 real fifty-eight each sample identified method as reported this paper....
There is a high demand for rapid determination of fipronil in pesticide preparations because it has been restricted and even prohibited many countries. An infrared-based methodology was developed this analyte acetamiprid formulations by attenuated total reflectance mid-infrared spectroscopy. The quantitative calibration models were established partial least squares regression. coefficients (R2) the model above 0.99 while both root mean square error prediction below 0.0011, which showed...
The rapid analysis of fipronil in pesticide preparations is demanded because use this restricted and even prohibited many countries. objective present work to compare four methodologies for quantitative matrine by ATR/transmittance FTIR combined with Beer's law partial least squares (PLS) analysis. To remove aqueous solvent, 0.2 ml each sample was dried under an infrared lamp subsequently re-dissolved 1 acetonitrile. Good calibration curves correlation coefficients (R2) 0.9982 (H1322) ATR...
Near infrared spectroscopy coupled with sample set partitioning based on joint X-Y distances combined partial least square regression was applied to the quantitative analysis of six routine chemicals, five physical indices and four macromolecular substances in reconstituted tobacco. The models these were established by regression. Results showed remarkable correlation between predicted measured values 15 indices. root mean error prediction all low, coefficients PLS greater than 0.85. This...
In this paper, a simple and efficient approach, directly suspended droplet microextraction (DSDME), has been applied to extract aroma components in Chinese southwest tobacco prior analysis by gas chromatography–mass spectrometry (GC–MS). The extraction parameters such as organic solvent type, time, temperature, stirring speed volume were systemically optimized. A single drop of cyclohexane was placed on the top aqueous sample which used solvent. Under optimal conditions DSDME, 62 analyzed...
Reconstituted tobacco products were characterized by near-infrared spectroscopy with classification models obtained through competitive adaptive reweighted sampling and partial least squares discrimination. Fifty samples used to characterize the accuracy of model. The results showed that all classified correctly at p > 5% level. model provided excellent training prediction sets 100 98.6%, respectively. stability monitored Hotelling T2 statistics, satisfactory.
ABSTRACT Natural rubber (NR) blends are widely used in many industries because of their excellent integrated properties. However, a simple, easily operational, nondestructive, and accurate method for quantitative analysis remains as challenge. This has been always an important issue the related industries, particularly daily quality control tests. One main reason is that NR ingredients vary according to geographical origin harvest time, which renders it hard set up versatile analytical...
The volatile components in tobacco leaves were extracted by simultaneous distillation and extraction (SDE), analyzed gas chromatography-mass spectrometry (GC-MS).The identified library searching spectral matching combined with retention index.Ion trap tandem mass was introduced to identify some which had tiny difference of matching, low concentration, complex matrix.144 searching, ion this paper.And 104 have been reported, 9 them spectrometry, the other 40 not reported literature.So is...
Background: Amylase used in the market is mostly medium-temperature enzyme or high-temperature and has poor activity under low-temperature environment. Acid α-amylase can be to develop digestion additives pharmaceutical healthcare industries. The amino acid sequence structural differences among α-amylases obtained from various organisms are high enough confer interesting biochemical diversity enzymes. However, low- temperature (0-50°C) amylase, with an optimum heat sensitivity, a greater...
Near-infrared (NIR) imaging systems simultaneously record spectral and spatial information. was applied to the identification of imidacloprid in both artificially mixed samples commercial formulation this study. The distributions technical additive heterogeneous counterfeit were obtained by relationship (RI) mode. Furthermore a series which consisted different contents uniformly distributed prepared three data cubes generated at each content. Extracted spectra from those images imported...
In this study, Green extraction of five major active components in Paeonia lactiflora (PRA) using ultrasound-assisted natural deep eutectic solvents. It was also studied for its antioxidant activity and bacteriostatic against Staphylococcus aureus. The results showed that the solvents 1,2-propanediol-lactic acid (molar ratio 1:2) most efficient. molar ratio, water content, time, temperature solid-liquid were examined one-way experiments, conditions optimized response surface method combined...
A near infrared (NIR) method was developed for the control of protective reaction in synthesis emamectin benzoate. NIR spectrometer with a fibre-optic probe used to analyse residual content avermectin and by-product shield. Partial least squares regression develop calibration models, which were preprocessed by second derivative first straight-line subtraction preprocessing methods. After optimising spectral pre-treatment, coefficient determination ( R 2 ) 0.92 0.99 root mean square errors...