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Related Experiment Video

Updated: Jul 2, 2026

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation

Published on: October 30, 2012

Interfacing a microcomputer with the Varian EM-360 NMR spectrometer.

¹Department of Physical Sciences, Southeastern Oklahoma State University, Durant, Oklahoma 74701.

The Review of Scientific Instruments

|September 1, 1978

Summary

This study presents a cost-effective microcomputer interface for NMR spectrometers, enabling advanced signal processing and multiple analytical capabilities beyond basic signal averaging.

Area of Science:

Nuclear Magnetic Resonance (NMR) Spectroscopy
Analytical Chemistry
Computational Instrumentation

Background:

Commercially available NMR signal enhancement devices (Computers of Average Transients - CAT) are expensive and lack application flexibility.
The emergence of 8-bit microprocessor-based computational devices offers a more economical and versatile alternative for NMR signal processing.

Purpose of the Study:

To detail the practical implementation of interfacing an Altair 8800B microcomputer with a Varian EM-360 1H-NMR spectrometer.
To demonstrate the creation of an intelligent NMR instrument with enhanced capabilities through microcomputer integration.

Main Methods:

Interfacing an Altair 8800B microcomputer with a Varian EM-360 1H-NMR spectrometer.
Developing programmable functionalities using high-level language (8k BASIC) for advanced data acquisition and analysis.

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A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

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Implementing multiple operating modes including repetitive scan CAT, difference spectrometry, kinetic NMR, and T1/T2 analysis.

Main Results:

A programmable NMR system with 4096 point (12-bit) field resolution was successfully developed.
Multiple advanced operating modes were implemented, including conventional spectrum acquisition, repetitive scan CAT, difference spectrometry, kinetic NMR, progressive saturation analysis, and INDOR.
The system provides graphic output, magnetic data storage, and immediate data reduction capabilities.

Conclusions:

Microcomputer interfacing offers a superior, economical, and flexible alternative to traditional NMR signal enhancement devices.
The developed system transforms a standard NMR spectrometer into an intelligent instrument capable of diverse analytical applications.
Further development, including user-defined machine language routines, is underway for expanded capabilities like correlation spectrometry.