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Gas Chromatography: Types of Detectors-II

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In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...

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Gas Chromatography: Types of Detectors-I

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¹³C NMR: ¹H–¹³C Decoupling

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Related Experiment Video

Updated: May 11, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

Hydrogen, carbon and oxygen determination in proxy material samples using a LaBr3:Ce detector.

A A Naqvi¹, Faris A Al-Matouq, F Z Khiari

¹Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia. aanaqvi@kfupm.edu.sa

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine

|May 16, 2013

Summary

This study accurately measured hydrogen, carbon, and oxygen in various materials using neutron inelastic scattering. The LaBr3:Ce detector demonstrated effective elemental analysis for drug and material characterization.

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Last Updated: May 11, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

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Published on: March 29, 2016

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Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements

Published on: September 7, 2019

Area of Science:

Analytical Chemistry
Nuclear Physics
Materials Science

Background:

Accurate elemental analysis is crucial for material characterization, including pharmaceuticals, explosives, and industrial chemicals.
Neutron inelastic scattering is a powerful technique for non-destructive elemental analysis.
LaBr3:Ce detectors offer high efficiency and energy resolution for gamma-ray detection.

Purpose of the Study:

To quantify hydrogen, carbon, and oxygen concentrations in diverse bulk materials using 14 MeV neutron inelastic scattering.
To evaluate the performance of a LaBr3:Ce detector for elemental analysis in complex matrices.
To determine the minimum detectable concentrations (MDC) for key elements.

Main Methods:

Utilized 14 MeV neutron inelastic scattering for elemental analysis.
Employed a LaBr3:Ce detector for high-resolution gamma-ray spectroscopy.
Analyzed bulk samples including caffeine, urea, ammonium acetate, and melamine.
Correlated experimental gamma-ray yields with theoretical predictions based on elemental concentrations.

Main Results:

Successfully measured hydrogen, carbon, and oxygen concentrations in tested samples.
Demonstrated the effectiveness of the LaBr3:Ce detector despite its intrinsic activity.
Observed excellent agreement between experimental and theoretical gamma-ray yields.
Achieved minimum detectable concentration (MDC) values for H, C, and O consistent with prior studies.

Conclusions:

14 MeV neutron inelastic scattering with a LaBr3:Ce detector is a viable method for quantifying H, C, and O in various materials.
The technique shows potential for analyzing drugs, explosives, and benign materials.
Nitrogen detection was hindered by spectral interference from background gamma rays.