On-Line Near-Infrared Spectrometer to Monitor Urea Removal in Real Time during Hemodialysis

2008 ◽  
Vol 62 (8) ◽  
pp. 866-872 ◽  
Author(s):  
David S. Cho ◽  
Jonathon T. Olesberg ◽  
Michael J. Flanigan ◽  
Mark A. Arnold
Keyword(s):  
Real Time ◽  
Near Infrared ◽  
Infrared Spectrometer ◽  
On Line ◽  
Near Infrared Spectrometer

In situ and real-time monitoring of an ultrasonic-assisted enzymatic hydrolysis process of corn gluten meal by a miniature near infrared spectrometer

2017 ◽  
Vol 9 (25) ◽  
pp. 3795-3803 ◽  
Author(s):  
Lin Luo ◽  
Yanyan Zhang ◽  
Kai Wang ◽  
Haile Ma ◽  
Mingsheng Dong
Keyword(s):  
Enzymatic Hydrolysis ◽  
Real Time ◽  
Near Infrared ◽  
Corn Gluten Meal ◽  
Hydrolysis Process ◽  
Corn Gluten ◽  
Ultrasonic Assisted ◽  
Infrared Spectrometer ◽  
Near Infrared Spectrometer

Ultrasound treatment during proteolysis could facilitate enzymatic hydrolysis.

Near-Infrared Spectrometer Optical Sensor Driving and Peripheral Circuit Design

2013 ◽  
Vol 437 ◽  
pp. 674-677 ◽  
Author(s):  
Xiao Qing Deng ◽  
Jie Liu ◽  
Zhi Hong Wang
Keyword(s):  
Real Time ◽  
Circuit Design ◽  
Optical Sensors ◽  
Optical Sensor ◽  
Near Infrared ◽  
External Circuit ◽  
Software Simulation ◽  
Linear Ccd ◽  
Infrared Spectrometer ◽  
Near Infrared Spectrometer

In order to achieve Near-infrared spectrometer the feature of real-time capture and analysis in real time, CCD is used on the optical sensors. It has done a software simulation and hardware implementation.This paper presents the method of using VHDL for the solution of the linear CCD driving. Then, the external circuit is designed and the differential amplification processing to the output of the liner CCD is done in this paper. The results show that the system can correct drive,and the signal is displayed correctly. It needs only 2.5ms to complete a scany period in the 16MHZ crystal. The greater frequency of crystal,the shorter a scany period. The design is easy to understand. It has a great space to the behind application.

Investigation on spectral standardization among multi-channel of an on-line near-infrared spectrometer

2021 ◽  
pp. 103206
Author(s):  
Xiting Sun ◽  
Peng Zhang ◽  
Ziwei Shen ◽  
Hongfu Yuan ◽  
Chunfeng Song ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Spectrometer ◽  
On Line ◽  
Near Infrared Spectrometer

Feasibility of On-Line Monitoring of the BTU Content of Natural Gas with a Near-Infrared Fiber Optic System

1993 ◽  
Vol 47 (6) ◽  
pp. 812-815 ◽  
Author(s):  
Chris W. Brown ◽  
Su-Chin Lo
Keyword(s):  
Natural Gas ◽  
Near Infrared ◽  
Energy Content ◽  
Fused Silica ◽  
Industry Standard ◽  
Calibration Algorithm ◽  
Infrared Spectrometer ◽  
On Line ◽  
Fiber Optic System ◽  
Near Infrared Spectrometer

Optical-fiber measurements coupled with near-infrared spectra in the range of 5500 to 10,000 cm−1 are used to determine the optimum spectral region for remotely monitoring the energy content of natural gas at above ambient pressures. The system was configured with a Fourier transform near-infrared spectrometer and a fused-silica fiber bundle. The total energy values at a pressure of 100 psi were determined by the partial least-squares (PLS) calibration algorithm. The precision and accuracy for predicting the BTU content of an industry standard gas sample were less than 0.4% in the lower-frequency region of 5700 to 6400 cm−1.

Handheld near-infrared spectrometer for on-line monitoring of biodiesel production in a continuous process

Fuel ◽  
2019 ◽  
Vol 254 ◽  
pp. 115680 ◽  
Author(s):  
Rafaella Sales ◽  
Neirivaldo C. da Silva ◽  
Josivan P. da Silva ◽  
Higor H. França ◽  
Maria Fernanda Pimentel ◽  
...  
Keyword(s):  
Near Infrared ◽  
Continuous Process ◽  
Biodiesel Production ◽  
Infrared Spectrometer ◽  
On Line ◽  
Near Infrared Spectrometer

scholarly journals Handheld near-infrared spectrometer allows on-line prediction of beef quality traits

Meat Science ◽  
2021 ◽  
pp. 108694
Author(s):  
Arianna Goi ◽  
Jean François Hocquette ◽  
Erika Pellattiero ◽  
Massimo De Marchi
Keyword(s):  
Near Infrared ◽  
Quality Traits ◽  
Beef Quality ◽  
Infrared Spectrometer ◽  
On Line ◽  
Near Infrared Spectrometer

scholarly journals The Improvement on the Performance of DMD Hadamard Transform Near-Infrared Spectrometer by Double Filter Strategy and a New Hadamard Mask

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 149 ◽  
Author(s):  
Zifeng Lu ◽  
Jinghang Zhang ◽  
Hua Liu ◽  
Jialin Xu ◽  
Jinhuan Li
Keyword(s):  
Near Infrared ◽  
Signal To Noise Ratio ◽  
Nonuniform Distribution ◽  
Stray Light ◽  
Spectral Energy ◽  
Hadamard Transform ◽  
Digital Micromirror Device ◽  
Infrared Spectrometer ◽  
Near Infrared Spectrometer ◽  
The Impact

In the Hadamard transform (HT) near-infrared (NIR) spectrometer, there are defects that can create a nonuniform distribution of spectral energy, significantly influencing the absorbance of the whole spectrum, generating stray light, and making the signal-to-noise ratio (SNR) of the spectrum inconsistent. To address this issue and improve the performance of the digital micromirror device (DMD) Hadamard transform near-infrared spectrometer, a split waveband scan mode is proposed to mitigate the impact of the stray light, and a new Hadamard mask of variable-width stripes is put forward to improve the SNR of the spectrometer. The results of the simulations and experiments indicate that by the new scan mode and Hadamard mask, the influence of stray light is restrained and reduced. In addition, the SNR of the spectrometer also is increased.

Investigating the total antioxidant capacity of gluten-free grains with miniaturized near-infrared spectrometer

NIR news ◽  
2019 ◽  
Vol 30 (5-6) ◽  
pp. 35-38
Author(s):  
Verena Wiedemair ◽  
Christian Wolfgang Huck
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
High Performance ◽  
Near Infrared ◽  
Least Squares Regression ◽  
Test Set ◽  
Total Antioxidant ◽  
Infrared Spectrometer ◽  
Near Infrared Spectrometer ◽  
Infrared Instruments

The use of ever smaller near-infrared instruments is becoming more and more prevalent, since they are cheaper, more versatile and often advertised as high-performance spectrometer. The last claim is rarely verified by independent researchers, which is why the presented work evaluates the performance of three hand-held spectrometers in comparison to a benchtop instrument. Seventy-seven samples comprising buckwheat, millet and oat were investigated for their total antioxidant capacity using Folin–Ciocalteu and near-infrared spectroscopy. Partial least squares regression models were established using cross- and test set validation. Results showed that all instruments were able to predict total antioxidant capacity to some extent. The coefficients of determinations ranged from 0.823 to 0.951 for cross-validated and from 0.849 to 0.952 for test set validated models. Errors for cross-validated models ranged from 1.11 to 2.08 mgGAE/g and for test set validated models from 1.02 to 1.86 mgGAE/g.

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