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Updated: May 23, 2025

UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media
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UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media

Published on: October 25, 2021

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实时总含量统一性评估使用近红外传输光谱的固体剂型

Motoki Inoue1, Eiji Taniguchi2, Junichi Sano2

  • 1Hoshi University, 2-4-41, Ebara, Shinagawa-ku, Tokyo 142-8501, Japan.

Analytical chemistry
|March 10, 2025
PubMed
概括

近红外 (NIR) 传输光谱能够快速,实时地对连续制造中的固体剂型进行质量控制. 这种先进的方法可以准确预测活性药物成分 (API) 含量,确保产品在高吞吐量时的质量.

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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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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
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IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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