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Related Concept Videos

IR Spectrometers01:25

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...
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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.
Different compounds display unique properties due to their...
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...

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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
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Interfacing an analogue infrared spectrometer to a microcomputer.

M J Adams1, G J Ewen

  • 1Department of Spectrochemistry, Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen, Scotland.

Talanta
|February 1, 1987
PubMed
Summary
This summary is machine-generated.

An Apple microcomputer was interfaced with an infrared spectrometer for digital data acquisition. This system allows for the manipulation of spectral data using existing software, enhancing analytical capabilities.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Computer Science

Background:

  • Traditional infrared spectrometers generate analog data.
  • Digital data processing offers enhanced analytical capabilities.
  • Interfacing microcomputers can modernize legacy analytical instruments.

Purpose of the Study:

  • To interface an Apple microcomputer with a Perkin-Elmer model 577 infrared spectrometer.
  • To develop a digital data acquisition system for infrared spectroscopy.
  • To enable the use of existing digital spectral data analysis software.

Main Methods:

  • An in-house designed 12-bit analog-to-digital interface unit was utilized.
  • Control and status signals were obtained from the spectrometer.
  • An optical encoder unit provided an accurate wavenumber marker.
  • The microcomputer formatted the digitized spectral data.

Main Results:

  • Successful interfacing of the Apple microcomputer with the infrared spectrometer.
  • Digitization of spectral data with a 12-bit resolution.
  • Accurate wavenumber marking for data conversion and recording.
  • Formatted digital data compatible with existing analysis programs.

Conclusions:

  • The developed system effectively digitizes infrared spectral data.
  • The microcomputer interface allows for the manipulation of spectral data using established software.
  • This integration modernizes the Perkin-Elmer 577 spectrometer for digital analysis.