Rapid determination of major bioactive isoflavonoid compounds during the extraction process of kudzu (Pueraria lobata) by near-infrared transmission spectroscopy

2015 ◽  
Vol 137 ◽  
pp. 1403-1408 ◽  
Author(s):  
Pei Wang ◽  
Hui Zhang ◽  
Hailong Yang ◽  
Lei Nie ◽  
Hengchang Zang
Keyword(s):  
Near Infrared ◽  
Rapid Determination ◽  
Extraction Process ◽  
Pueraria Lobata ◽  
Infrared Transmission ◽  
Transmission Spectroscopy

scholarly journals Estimation of composition of quinoa ( Chenopodium quinoa Willd.) grains by Near-Infrared Transmission spectroscopy

LWT ◽  
2017 ◽  
Vol 79 ◽  
pp. 126-134 ◽  
Author(s):  
Christian Encina-Zelada ◽  
Vasco Cadavez ◽  
Jorge Pereda ◽  
Luz Gómez-Pando ◽  
Bettit Salvá-Ruíz ◽  
...  
Keyword(s):  
Near Infrared ◽  
Chenopodium Quinoa ◽  
Infrared Transmission ◽  
Transmission Spectroscopy

Application of near Infrared Transmission Spectroscopy for the Determination of Some Quality Parameters of Apples

1994 ◽  
Vol 2 (4) ◽  
pp. 213-221 ◽  
Author(s):  
T. Lovász ◽  
P. Merész ◽  
A. Salgó
Keyword(s):  
Dry Matter ◽  
Near Infrared ◽  
Matter Content ◽  
Dry Matter Content ◽  
Quality Factors ◽  
Infrared Transmission ◽  
Transmission Method ◽  
Titratable Acid ◽  
Transmission Spectroscopy ◽  
Relative Standard

The acceptability of near infrared (NIR) transmission spectroscopy for the prediction of six quality factors of apples (firmness, refractive index, pH, titratable acid, dry matter and alcohol insoluble solids content) was investigated. The effects of storage conditions, cultivars and season on the accuracy of the NIR transmission method were also studied during the experiment. The accuracy of the calibration of all investigated parameters decreased during storage. The alteration of the characteristics of the spectra is possibly due to changes in the chemical composition and structure of apples between September and April. The calibration method was improved by developing a separate calibration for each cultivar per year. The calibrations of the different parameters are season-dependent except for the dry matter content. Using outlier diagnostics, the prediction accuracy can be generally improved by about 10%. The coefficient of variation for each parameter is compatible with the relative standard deviation for the reference methods except for the titratable acid content, showing the applicability of NIR transmission techniques. A relationship seems to exist between the maturity and the NIR transmission spectra of the apple.

Rapid determination of Panax ginseng by near-infrared spectroscopy

2013 ◽  
Vol 5 (23) ◽  
pp. 6715 ◽  
Author(s):  
Bu Haibo ◽  
Nie Lixing ◽  
Wang Dan ◽  
Yuan Shaoxiong ◽  
Li Shan ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Panax Ginseng ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Rapid Determination

scholarly journals Milk as a Complex Multiphase Polydisperse System: Approaches for the Quantitative and Qualitative Analysis

2020 ◽  
Vol 4 (4) ◽  
pp. 151 ◽  
Author(s):  
Alena Smirnova ◽  
Georgii Konoplev ◽  
Nikolay Mukhin ◽  
Oksana Stepanova ◽  
Ulrike Steinmann
Keyword(s):  
Quality Control ◽  
Near Infrared ◽  
Rapid Determination ◽  
Physiological State ◽  
Atomic Spectroscopy ◽  
Milk Analysis ◽  
Polydisperse System ◽  
Advantages And Disadvantages ◽  
Non Destructive

Milk is a product that requires quality control at all stages of production: from the dairy farm, processing at the dairy plant to finished products. Milk is a complex multiphase polydisperse system, whose components not only determine the quality and price of raw milk, but also reflect the physiological state of the herd. Today’s production volumes and rates require simple, fast, cost-effective, and accurate analytical methods, and most manufacturers want to move away from methods that use reagents that increase analysis time and move to rapid analysis methods. The review presents methods for the rapid determination of the main components of milk, examines their advantages and disadvantages. Optical spectroscopy is a fast, non-destructive, precise, and reliable tool for determination of the main constituents and common adulterants in milk. While mid-infrared spectroscopy is a well-established off-line laboratory technique for the routine quality control of milk, near-infrared technologies provide relatively low-cost and robust solutions suitable for on-site and in-line applications on milking farms and dairy production facilities. Other techniques, discussed in this review, including Raman spectroscopy, atomic spectroscopy, molecular fluorescence spectroscopy, are also used for milk analysis but much less extensively. Acoustic methods are also suitable for non-destructive on-line analysis of milk. Acoustic characterization can provide information on fat content, particle size distribution of fat and proteins, changes in the biophysical properties of milk over time, the content of specific proteins and pollutants. The basic principles of ultrasonic techniques, including transmission, pulse-echo, interferometer, and microbalance approaches, are briefly described and milk parameters measured with their help, including frequency ranges and measurement accuracy, are given.

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