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Method for measuring content of manganese element in cotton seed meal

A technology of element content and determination method, which is applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of long analysis time, consumption, and cumbersome sample preparation, and achieves a process that promotes processing and utilization and has high measurement accuracy. Effect

Inactive Publication Date: 2015-11-18
ZHEJIANG UNIV
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Problems solved by technology

[0004] At present, conventional chemical methods are mainly used for the determination of manganese in cottonseed, such as flame atomic absorption method and inductively coupled plasma mass spectrometry. High cost, large consumption of nitric acid, sulfuric acid and other highly corrosive and dangerous reagents

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  • Method for measuring content of manganese element in cotton seed meal
  • Method for measuring content of manganese element in cotton seed meal
  • Method for measuring content of manganese element in cotton seed meal

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specific Embodiment

[0028] (1) Cottonseeds are pretreated: dry the cottonseeds after velvet removal, grind the seeds into powder with a milling machine, pass through a 60-mesh sieve, and obtain cottonseed powder samples; take cottonseeds from different ecological regions and varieties in the country as samples, and press After freeze-drying in the above steps, pulverize with a sample mill to obtain the dry powder sample.

[0029] Cottonseed samples were collected from 11 regions across the country, including different ecological planting areas such as Hangzhou in Zhejiang Province, Wuhu in Anhui Province, Yancheng in Jiangsu Province, and Lixian County in Hunan Province. A total of 288 cottonseed samples were collected from multiple cotton varieties.

[0030] (2) Spectrum collection of samples

[0031] Put the cottonseed powder into the sample cell, scan each sample four times, the sample spectrum is as follows figure 2 shown.

[0032] Near-infrared spectrum analysis parameters: The model of n...

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Abstract

The invention discloses a method for measuring the content of a manganese element in cotton seed meal. Different types of cotton seed meal samples planted in different regions are prepared, spectra of the cotton seed meal samples are acquired by a near infrared reflectance spectrograph, a PLS model is constructed through full cross validation in the full spectrum range, and then the PLS model is analyzed with 12 preprocessing methods; a processing method corresponding to the prediction related coefficient R<2> maximum and the RMSE (root-mean-square error) minimum are taken as the optimal preprocessing method, and an NIRS (near infrared reflectance spectroscopy) correction model is established with the optimal preprocessing method; the to-be-measured cotton seed meal is detected with the NIRS correction model constructed in the previous steps, and the content of the manganese element is obtained. A spectrum chart of the cotton seed meal is acquired by the aid of the FOSS5000 near infrared reflectance spectrograph, the measurement accuracy is high, and the method is quick, convenient and efficient and has great significance in cultivation of new cotton varieties and promotion of processing and utilization of cotton by-products.

Description

technical field [0001] The invention relates to a method for determining content, in particular to a method for determining the content of manganese in cottonseed powder. Background technique [0002] Near Infrared Spectroscopy (Near Infrared Reflectance Spectroscopy, NIRS) analysis technology is through the hydrogen-containing groups in the analyzed substances such as OH, CH, NH, SH, etc., which have characteristic absorption peaks in the near-infrared region. The scanned sample spectral information is subjected to a series of analysis and processing, and finally the quantitative analysis of the relevant components of the sample is completed. Near-infrared spectrometers can collect characteristic absorption signals of almost all organic substances, but there are no absorption peaks for metal elements, but metal elements in plants do not exist alone, and are often combined or chelated with many active enzymes and other organic substances, enriched in plant tissues , thus be...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3577
Inventor 祝水金余恩陈进红何秋伶蔡芸菲黄洁琼
Owner ZHEJIANG UNIV
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