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Updated: Jun 21, 2025

Construction of Models for Nondestructive Prediction of Ingredient Contents in Blueberries by Near-infrared Spectroscopy Based on HPLC Measurements
10:25

Construction of Models for Nondestructive Prediction of Ingredient Contents in Blueberries by Near-infrared Spectroscopy Based on HPLC Measurements

Published on: June 28, 2016

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预测咖啡发酵期间的pH和总溶性固体的演变,使用近红外光谱与化学测量相结合

Vicente Tirado-Kulieva1,2, Carlos Quijano-Jara3, Himer Avila-George4

  • 1Instituto de Investigación para el Desarrollo Sostenible y Cambio Climático, Universidad Nacional de Frontera, Sullana, 20100, Piura, Peru.

Current research in food science
|July 15, 2024
PubMed
概括

这项研究引入了一种新方法,即覆盖阵列特征选择 (CAFS),用于使用NIR光谱学精确监测咖啡发酵. CAFS优化了用于预测pH和总溶性固体 (TSS) 的模型,改善了咖啡质量控制.

关键词:
在咖啡咖啡咖啡咖啡咖啡咖啡咖啡功能选择 功能选择发酵 发酵 是一个过程.护士们的护士们它们的pH值为pH.

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PTR-ToF-MS Coupled with an Automated Sampling System and Tailored Data Analysis for Food Studies: Bioprocess Monitoring, Screening and Nose-space Analysis08:43

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相关概念视频

Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
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In IR spectroscopy of carboxylic acids, the C=O bond shows a characteristic band between 1710 and 1760 cm⁻¹, and the O–H bond exhibits a broad band between 2500 and 3300 cm⁻¹.
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency,...
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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
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