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Flame Photometry: Overview

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...

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Related Experiment Video

Updated: Jun 12, 2026

High-Throughput Analysis of Non-Photochemical Quenching in Crops Using Pulse Amplitude Modulated Chlorophyll Fluorometry

High-Throughput Analysis of Non-Photochemical Quenching in Crops Using Pulse Amplitude Modulated Chlorophyll Fluorometry

Published on: July 6, 2022

Dayglow photometry: a new approach.

R Narayanan, J N Desai, N K Modi

|June 18, 2010

Summary

A novel photometer precisely measures faint daytime thermospheric emissions, overcoming background noise. This breakthrough enables new studies of atmospheric phenomena like dayglow.

Area of Science:

Atmospheric Physics
Optical Instrumentation
Aeronomy

Background:

Measuring faint atmospheric emissions against bright solar backgrounds is challenging.
Previous attempts to measure daytime thermospheric emissions faced significant limitations.

Purpose of the Study:

To develop and commission a unique photometer for measuring daytime oxygen (OI) 630.0-nm emissions in the thermosphere.
To overcome the limitations of prior instruments in detecting low-intensity signals.

Main Methods:

Utilized a low-resolution (10^4) Fabry-Perot etalon.
Incorporated a temperature-tuned, narrowband (3-Å) interference filter.
Employed a radial chopper and an up/down counting system for background elimination.

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Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

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Published on: October 27, 2017

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

Published on: May 29, 2019

Related Experiment Videos

Last Updated: Jun 12, 2026

High-Throughput Analysis of Non-Photochemical Quenching in Crops Using Pulse Amplitude Modulated Chlorophyll Fluorometry

High-Throughput Analysis of Non-Photochemical Quenching in Crops Using Pulse Amplitude Modulated Chlorophyll Fluorometry

Published on: July 6, 2022

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Published on: October 27, 2017

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer

Published on: May 29, 2019

Main Results:

Successfully developed and commissioned a photometer capable of measuring line intensities below 0.1% of the background continuum.
Demonstrated the ability to measure daytime OI 630.0-nm emission from the thermosphere.

Conclusions:

The developed photometer overcomes previous measurement limitations for faint atmospheric phenomena.
The instrument's design and background elimination method open possibilities for various applications beyond current dayglow studies.