Rapid and non-destructive discrimination of special-grade flat green tea using Near-infrared spectroscopy

A fast non-destructive method of detection of wool content in blended fabrics was studied based on Near Infrared spectroscopy technology in order to avoid the time-consuming, tedious work and the destruction of samples in the traditional inspection. 621 wool/nylon, wool/polyester and wool/nylon/polyester blended fabrics were taken as research objects. To get the wool content, we established the wool near-infrared quantitative model by partial least squares (PLS) method after analyzing the color and composition of the samples. For verifying the validity and practicability of the model, 100 samples were chosen as an independent validation set. The variance analysis shows that there is no significant difference between Near Infrared fast detection method and national standard method (GB/T2910-2009),which indicates that this method is expected to be a means of fast non-destructive detection and will have extensive application future in the field of wool content detection.

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Development of Method for Non-destructive Measurement of Nitrate Concentration in Vegetable Leaves by Near-infrared Spectroscopy

IFAC Proceedings Volumes ◽

10.3182/20110828-6-it-1002.00738 ◽

2011 ◽

Vol 44 (1) ◽

pp. 1773-1778 ◽

Cited By ~ 8

Author(s):

Hiromichi Itoh ◽

Hirotsugu Tomita ◽

Yuichi Uno ◽

Naomasa Shiraishi

Keyword(s):

Infrared Spectroscopy ◽

Near Infrared Spectroscopy ◽

Near Infrared ◽

Nitrate Concentration ◽

Destructive Measurement ◽

Non Destructive

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Toward automated non-destructive diagnosis of chloride attack on concrete structures by near infrared spectroscopy

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.124796 ◽

2021 ◽

Vol 305 ◽

pp. 124796

Author(s):

A. Watanabe ◽

S. Tokuda ◽

Y. Mizuta ◽

S. Miyamoto ◽

T. Nakanishi ◽

...

Keyword(s):

Infrared Spectroscopy ◽

Near Infrared Spectroscopy ◽

Near Infrared ◽

Concrete Structures ◽

Chloride Attack ◽

Non Destructive

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Measurement of the Ratio of Tea Polyphenols to Amino Acids in Green Tea Infusion Based on near Infrared Spectroscopy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.301-303.1093 ◽

2011 ◽

Vol 301-303 ◽

pp. 1093-1097 ◽

Cited By ~ 2

Author(s):

Shi Rong Ai ◽

Rui Mei Wu ◽

Lin Yuan Yan ◽

Yan Hong Wu

Keyword(s):

Amino Acids ◽

Infrared Spectroscopy ◽

Correlation Coefficient ◽

Green Tea ◽

Near Infrared Spectroscopy ◽

Near Infrared ◽

Nir Spectroscopy ◽

Tea Polyphenols ◽

Strong Absorption ◽

Tea Infusion

This study attempted the feasibility to determine the ratio of tea polyphenols to amino acids in green tea infusion using near infrared (NIR) spectroscopy combined with synergy interval PLS (siPLS) algorithms. First, SNV was used to preprocess the original spectra of tea infusion; then, siPLS was used to select the efficient spectra regions from the preprocessed spectra. Experimental results showed that the spectra regions [7 8 18] were selected, which were out of the strong absorption of H2O. The optimal PLS model was developed with the selected regions when 6 PCs components were contained. The RMSEP value was equal to 0.316 and the correlation coefficient (R) was equal to 0.8727 in prediction set. The results demonstrated that NIR can be successfully used to determinate the ration of tea polyphenols to amino acids in green tea infusion.

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