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Atomic Emission Spectroscopy: Overview

Atomic Emission Spectroscopy: Overview

Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...

Atomic Emission Spectroscopy: Instrumentation

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.

Atomic Emission Spectroscopy: Lab

Atomic Emission Spectroscopy: Lab

AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...

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Performance Evaluation of Survey Solutions in Detecting and Localizing Source-Level Emissions Using a Single-Blind

Chiemezie Ilonze¹, Rachel Day², Ethan Emerson²

¹Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States.

Environmental Science & Technology

|December 24, 2025

Summary

Hand-held optical gas imaging (OGI) cameras excel at detecting and locating methane leaks in oil and gas facilities. Standardized testing shows OGI cameras outperform emerging solutions for accurate emissions mitigation.

Keywords:

detection limit emissions mitigation leak detection and repair localization accuracy and precision methane natural gas source attribution survey solutions survey time

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Published on: May 22, 2020

Area of Science:

Environmental Science
Chemical Engineering
Geoscience

Background:

Standardized testing is crucial for validating new methane detection technologies against established methods like optical gas imaging (OGI).
North American oil and gas production facilities face increasing scrutiny regarding methane emissions.

Purpose of the Study:

To compare the performance of 12 emerging methane detection solutions against regulatory-approved methods.
To assess the reliability and accuracy of different methane detection technologies under controlled conditions.

Main Methods:

A single-blind controlled testing protocol was used at a simulated onshore oil and gas facility.
Twelve solutions, including hand-held OGI cameras, NextGen, and mobile (automobile/drone-based) systems, were evaluated.
Three solutions were retested after 3-12 months to assess performance changes over time.

Main Results:

Hand-held OGI cameras demonstrated superior emission source localization accuracy and lower false positive rates.
OGI cameras showed comparable false negative fractions to NextGen solutions but lower than mobile solutions.
Mobile solutions offered shorter survey durations compared to other hand-held options.

Conclusions:

Hand-held OGI cameras are highly effective for identifying and accurately locating small methane emission sources.
Emerging survey solutions show promise, but OGI cameras currently offer higher efficacy.
Regular, comprehensive testing can improve the performance and reliability of methane detection solutions.