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IR Spectrometers

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...

Effects of EDTA on End-Point Detection Methods

Effects of EDTA on End-Point Detection Methods

Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...

Applications of IR Spectroscopy: Overview

Applications of IR Spectroscopy: Overview

The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...

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Related Experiment Video

Updated: Jun 10, 2026

High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

High-definition Fourier Transform Infrared (FT-IR) Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology

Published on: January 21, 2015

[Review on estimation of postmortem interval using FTIR spectroscopy].

Ping Huang¹, Ya Tuo, Zhen-Yuan Wang

¹Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, Shanghai 200063, P R China. huangpingifs@gmail.com

Fa Yi Xue Za Zhi

|August 17, 2010

Summary

This summary is machine-generated.

Fourier transform infrared (FTIR) spectroscopy shows potential for estimating the postmortem interval (PMI). This method analyzes spectral changes in tissues after death, offering a new approach to forensic casework.

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Area of Science:

Forensic Science
Biomedical Spectroscopy

Context:

Accurate postmortem interval (PMI) estimation is crucial in forensic casework.
Traditional PMI estimation methods face limitations due to various influencing factors.

Purpose:

To review the mechanism of Fourier transform infrared (FTIR) spectroscopy.
To explore the application of FTIR in biomedicine and its potential for PMI estimation.

Summary:

FTIR spectroscopy, a technique for analyzing molecular vibrations, has been applied to biological samples.
This paper discusses postmortem spectral changes observed using FTIR.
The study highlights the potential of FTIR spectroscopy for quantitative analysis in forensic science.

Impact:

Provides a novel spectroscopic approach for postmortem interval estimation.
Enhances the toolkit for forensic investigators.
Contributes to the advancement of forensic science methodologies.