In situ identification of gemstone beads excavated from tombs of the Han Dynasties in Hepu county, Guangxi Province, China using a portable Raman spectrometer

2014 ◽  
Vol 45 (7) ◽  
pp. 596-602 ◽  
Author(s):  
Junqing Dong ◽  
Yunling Han ◽  
Jiwang Ye ◽  
Qinghui Li ◽  
Song Liu ◽  
...  
Keyword(s):  
Guangxi Province ◽  
Raman Spectrometer ◽  
Portable Raman

Characterisation of a portable Raman spectrometer for in situ analysis of art objects

2014 ◽  
Vol 118 ◽  
pp. 294-301 ◽  
Author(s):  
Debbie Lauwers ◽  
Anna Garcia Hutado ◽  
Vinka Tanevska ◽  
Luc Moens ◽  
Danilo Bersani ◽  
...  
Keyword(s):  
In Situ Analysis ◽  
Raman Spectrometer ◽  
Art Objects ◽  
Portable Raman

scholarly journals Quantitative visualization of photosynthetic pigments in tea leaves based on Raman spectroscopy and calibration model transfer

Plant Methods ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Jianjun Zeng ◽  
Wen Ping ◽  
Alireza Sanaeifar ◽  
Xiao Xu ◽  
Wei Luo ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Photosynthetic Pigments ◽  
Spectral Model ◽  
Calibration Model ◽  
Tea Leaves ◽  
Raman Spectrometer ◽  
Quantitative Visualization ◽  
Model Transfer ◽  
Portable Raman

Abstract Background Photosynthetic pigments participating in the absorption, transformation and transfer of light energy play a very important role in plant growth. While, the spatial distribution of foliar pigments is an important indicator of environmental stress, such as pests, diseases and heavy metal stress. Results In this paper, in situ quantitative visualization of chlorophyll and carotenoid was realized by combining the Raman spectroscopy with calibration model transfer, and a laboratory Raman spectral model was successfully extended to a portable field spectral measurement. Firstly, a nondestructive and fast model for determination of chlorophyll and carotenoid in tea leaf was established based on confocal micro-Raman spectrometer in the laboratory. Then the spectral model was extended to a real-time foliar map scanning spectra of a field portable Raman spectrometer through calibration model transfer, and the spectral variation between the confocal micro-Raman spectrometer in the laboratory and the portable Raman spectrometer were effectively corrected by the direct standardization (DS) algorithm. The portable map scanning Raman spectra of the tea leaves after the model transfer were got into the established quantitative determination model to predict the concentration of photosynthetic pigments at each pixel of the tea leaves. The predicted photosynthetic pigments concentration of each pixel was imaged to illustrate the distribution map of foliar pigments. Statistical analysis showed that the predicted pigment contents were highly correlated with the real contents. Conclusions It can be concluded that the Raman spectroscopy was applicable for in situ, non-destructive and rapid quantitative detecting and imaging of photosynthetic pigment concentration in tea leaves, and the spectral detection model established based on the laboratory Raman spectrometer can be applied to a portable field spectrometer for quantitatively imaging of the foliar pigments.

scholarly journals Portable Raman Spectrometer for In Situ Analysis of Asbestos and Fibrous Minerals

2020 ◽  
Vol 11 (1) ◽  
pp. 287
Author(s):  
Jasmine Rita Petriglieri ◽  
Danilo Bersani ◽  
Christine Laporte-Magoni ◽  
Mario Tribaudino ◽  
Alessandro Cavallo ◽  
...  
Keyword(s):  
New Caledonia ◽  
Fluorescence Emission ◽  
Workplace Safety ◽  
Mining Sites ◽  
Raman Spectrometer ◽  
Fibrous Minerals ◽  
Mining Front ◽  
In Situ Detection ◽  
Portable Raman

Asbestos inhalation is associated with fatal respiratory diseases and raises concerns from the perspective of workplace safety and environmental impacts. Asbestos and asbestos-like minerals naturally occur in rocks and may become airborne when outcrops or soils are disturbed by anthropic activities. In situ detection of these minerals is a crucial step for the risk evaluation of natural sites. We assess here whether a portable Raman spectrometer (pRS) may be used in the identification of asbestos and asbestos-like minerals at the mining front during exploitation. pRS performance was tested at three geologically different mining sites in Italy and New Caledonia and compared with a high-resolution micro-Raman spectrometer (HRS). About 80% of the overall in situ analyses at the mining front were successfully identified by pRS, even when intermixed phases or strongly disaggregated and altered samples were analyzed. Chrysotile and tremolite asbestos, asbestos-like antigorite, and balangeroite were correctly detected during surveys. The major difficulties faced during in situ pRS measurements were fluorescence emission and focussing the laser beam on non-cohesive bundles of fibers. pRS is adequate for discriminating asbestos and asbestos-like minerals in situ. pRS may support risk assessment of mining sites to better protect workers and environment.

scholarly journals Quantitative visualization of photosynthetic pigments in tea leaves based on Raman spectroscopy and calibration model transfer

2020 ◽  
Author(s):  
Jianjun Zeng ◽  
Wen Ping ◽  
Alireza Sanaeifar ◽  
Xiao Xu ◽  
Wei Luo ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Photosynthetic Pigments ◽  
Spectral Model ◽  
Calibration Model ◽  
Tea Leaves ◽  
Raman Spectrometer ◽  
Quantitative Visualization ◽  
Model Transfer ◽  
Portable Raman

Abstract Background: Photosynthetic pigments participating in the absorption, transformation and transfer of light energy play a very important role in plant growth. While, the spatial distribution of foliar pigments is an important indicator of environmental stress, such as pests, diseases and heavy metal stress. Results: In this paper, in situ quantitative visualization of chlorophyll and carotenoid was realized by combining the Raman spectroscopy with calibration model transfer, and a laboratory Raman spectral model was successfully extended to a portable field spectral measurement. Firstly, a nondestructive and fast model for determination of chlorophyll and carotenoid in tea leaf was established based on confocal micro-Raman spectrometer in the laboratory. Then the spectral model was extended to a real-time foliar map scanning spectra of a field portable Raman spectrometer through calibration model transfer, and the spectral variation between the confocal micro-Raman spectrometer in the laboratory and the portable Raman spectrometer were effectively corrected by the direct standardization (DS) algorithm. The portable map scanning Raman spectra of the tea leaves after the model transfer were got into the established quantitative determination model to predict the concentration of photosynthetic pigments at each pixel of the tea leaves. The predicted photosynthetic pigments concentration of each pixel was imaged to illustrate the distribution map of foliar pigments. Statistical analysis showed that the predicted pigment contents were highly correlated with the real contents.Conclusions: It can be concluded that the Raman spectroscopy was applicable for in situ, non-destructive and rapid quantitative detecting and imaging of photosynthetic pigment concentration in tea leaves, and the spectral detection model established based on the laboratory Raman spectrometer can be applied to a portable field spectrometer for quantitatively imaging of the foliar pigments.

scholarly journals Quantitative visualization of photosynthetic pigments in tea leaves based on Raman spectroscopy and calibration model transfer

2020 ◽  
Author(s):  
Jianjun Zeng ◽  
Shuai Zhang ◽  
Wei Luo ◽  
Junjing Sha ◽  
Yifeng Huang ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Photosynthetic Pigments ◽  
Spectral Model ◽  
Calibration Model ◽  
Tea Leaves ◽  
Raman Spectrometer ◽  
Quantitative Visualization ◽  
Model Transfer ◽  
Portable Raman

Abstract Background: Photosynthetic pigments participating in the absorption, transformation and transfer of light energy play a very important role in plant growth. While, the spatial distribution of foliar pigments is an important indicator of environmental stress, such as pests, diseases and heavy metal stress. Results: In this paper, in situ quantitative visualization of chlorophyll and carotenoid was realized by combining the Raman spectroscopy with calibration model transfer, and a laboratory Raman spectral model was successfully extended to a portable field spectral measurement. Firstly, a nondestructive and fast model for determination of chlorophyll and carotenoid in tea leaf was established based on confocal micro-Raman spectrometer in the laboratory. Then the spectral model was extended to a real-time foliar map scanning spectra of a field portable Raman spectrometer through calibration model transfer, and the spectral variation between the confocal micro-Raman spectrometer in the laboratory and the portable Raman spectrometer were effectively corrected by the direct standardization (DS) algorithm. The portable map scanning Raman spectra of the tea leaves after the model transfer were got into the established quantitative determination model to predict the concentration of photosynthetic pigments at each pixel of the tea leaves. The predicted photosynthetic pigments concentration of each pixel was imaged to illustrate the distribution map of foliar pigments. Statistical analysis showed that the predicted pigment contents were highly correlated with the real contents. Conclusions: It can be concluded that the Raman spectroscopy was applicable for in situ, non-destructive and rapid quantitative detecting and imaging of photosynthetic pigment concentration in tea leaves, and the spectral detection model established based on the laboratory Raman spectrometer can be applied to a portable field spectrometer for quantitatively imaging of the foliar pigments.

Diethyldithiocarbamate (DDTC) induced formation of positively charged silver nanoparticles for rapid in situ identification of inorganic explosives by surface enhanced Raman spectroscopy

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51823-51829 ◽  
Author(s):  
Juan Chen ◽  
Yu-e Shi ◽  
Min Zhang ◽  
Jinhua Zhan
Keyword(s):  
Raman Spectroscopy ◽  
Silver Nanoparticles ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Spectrometer ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Positively Charged ◽  
Portable Raman

Diethyldithiocarbamate could induce the generation of positively charged silver nanoparticles for rapidin situdetection of the explosives with a portable Raman spectrometer.

Rapid detection of gasoline by a portable Raman spectrometer and chemometrics

2012 ◽  
Vol 43 (10) ◽  
pp. 1487-1491 ◽  
Author(s):  
Xiaofang Zhang ◽  
Xiaohua Qi ◽  
Mingqiang Zou ◽  
Jingwei Wu
Keyword(s):  
Rapid Detection ◽  
Raman Spectrometer ◽  
Portable Raman

Rapid and Simple Analysis of the Human Pepsin Secondary Structure Using a Portable Raman Spectrometer

2021 ◽  
Author(s):  
Tong-Jiang Li ◽  
Bao-Ying Wen ◽  
Xiao-Hui Ma ◽  
Wan-Ting Huang ◽  
Jin-Zhun Wu ◽  
...  
Keyword(s):  
Secondary Structure ◽  
Simple Analysis ◽  
Raman Spectrometer ◽  
Portable Raman

scholarly journals Tetrahydrocannabinol Sensing in Complex Biofluid with Portable Raman Spectrometer Using Diatomaceous SERS Substrates

Biosensors ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 125 ◽  
Author(s):  
Sivashanmugan ◽  
Zhao ◽  
Wang
Keyword(s):  
Diatomaceous Earth ◽  
Microfluidic Channel ◽  
Principal Component ◽  
Surface Enhanced Raman Spectroscopy ◽  
Forensic Analysis ◽  
Sample Type ◽  
Raman Spectrometer ◽  
Sers Substrates ◽  
Tlc Separation ◽  
Portable Raman

Using thin-layer chromatography in tandem with surface-enhanced Raman spectroscopy (TLC-SERS) and tetrahydrocannabinol (THC) sensing in complex biological fluids is successfully conducted with a portable Raman spectrometer. Both THC and THC metabolites are detected from the biofluid of marijuana-users as biomarkers for identifying cannabis exposure. In this article, ultra-sensitive SERS substrates based on diatomaceous earth integrated with gold nanoparticles (Au NPs) were employed to detect trace levels of cannabis biomarkers in saliva. Strong characteristic THC and THC metabolite SERS peaks at 1601 and 1681 cm−1 were obtained despite the moderate interference of biological molecules native to saliva. Urine samples were also analyzed, but they required TLC separation of THC from the urine sample to eliminate the strong influence of urea and other organic molecules. TLC separation of THC from the urine was performed by porous microfluidic channel devices using diatomaceous earth as the stationary phase. The experimental results showed clear separation between urea and THC, and strong THC SERS characteristic peaks. Principal component analysis (PCA) was used to analyze the SERS spectra collected from various THC samples. The spectra in the principal component space were well clustered for each sample type and share very similar scores in the main principal component (PC1), which can serve as the benchmark for THC sensing from complex SERS spectra. Therefore, we proved that portable Raman spectrometers can enable an on-site sensing capability using diatomaceous SERS substrates to detect THC in real biological solutions. This portable THC sensing technology will play pivotal roles in forensic analysis, medical diagnosis, and public health.

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