Method for rapidly measuring inorganic element in tobacco by near infrared spectrum

A near-infrared spectroscopy and inorganic element technology is applied in the field of measuring the content of inorganic elements in tobacco leaves, which can solve the problems of large prediction errors and the like

Inactive Publication Date: 2014-09-03
山东烟草研究院有限公司
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Problems solved by technology

The conventional linear multivariate correction model cannot effectively solve this nonlinear problem, and the prediction error is much greater than the correction error. Therefore, it is necessary to establish a nonlinear correction model for the unique nonlinear characteristics of the analysis system.

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  • Method for rapidly measuring inorganic element in tobacco by near infrared spectrum
  • Method for rapidly measuring inorganic element in tobacco by near infrared spectrum
  • Method for rapidly measuring inorganic element in tobacco by near infrared spectrum

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Embodiment Construction

[0038] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] In recent years, near-infrared spectroscopy has been more and more widely used in the tobacco industry, and it is very suitable for the rapid analysis of a large number of tobacco leaf samples. Since inorganic ions in tobacco can combine with organic groups with near-infrared absorption in a certain form, their content can be determined by means of near-infrared spectroscopy. The present invention utilizes near-infrared spectrum of tobacco leaves combined with nonlinear partial least squares method to establish a quantitative correction model of inorganic elements in tobacco leaves, thereby realizing rapid determination of the content of inorganic elements in tobacco samples, which is of great significance to the control of tobacco quality.

[0040] The specific measurement method for the content of inorganic elements in tobacco leaves ...

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Abstract

The invention discloses a method for rapidly measuring an inorganic element in tobacco by a near infrared spectrum. The method comprises the steps of establishing a non-linearity calibration model and measuring the inorganic element in a to-be-measured tobacco sample. The method provided by the invention has the advantages that a non-linearity modeling technology is introduced in the process of establishing the calibration model, and a partial least squares modeling method based on kernel conversion is adopted, so that the influence of a non-linearity relation between a tobacco spectrum and the content of the inorganic element is eliminated, the requirement on rapid measurement on the inorganic element in a large number of tobacco samples is met, and rapid analysis and in-time feedback of the quality of tobacco are realized.

Description

technical field [0001] The invention belongs to the technical field of parameter detection, and in particular relates to a method for measuring the content of inorganic elements in tobacco leaves. Background technique [0002] Tobacco is an important economic crop. The ash content of tobacco leaves is about 10%, and the ash is mainly composed of inorganic elements. Tobacco plants need to absorb various inorganic nutrients during the growth process, so that the metabolism can proceed smoothly. After these inorganic substances are absorbed, they become the components of tobacco leaf cells. These inorganic elements in tobacco leaves are closely related to the growth and metabolism of tobacco leaves. Any abnormality (too high or too low) of any inorganic element will have varying degrees of impact on the shape, function, and yield and quality of tobacco leaves. An important factor affecting the quality of tobacco leaves. Among them, the inorganic elements with greater influen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G01N21/359
Inventor 王兴利许家来宋楠刘培江曲晓娜韩凤
Owner 山东烟草研究院有限公司
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