Flame Atomization
Flame Atomization - Related Videos
02:47
Metal Flame Emission - Concepts
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2020
Metal Flame Emission Flame testing is an analytical technique where a sample is placed in a flame, and the characteristic flame color is used to identify the substance. Each element has a characteristic light emission when placed into a flame, meaning each element produces a unique color. This phenomenon is used in fireworks displays, where the color of the fireworks corresponds to a specific characteristic of a metal. The emission of colored light from a burning sample is the direct result of...
07:27
Metal Flame Emission - Student Protocol
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Metal Flame Emission TestingExpand In this lab, you will excite the electrons of six metal chloride salts with heat from a flame and measure the wavelength of light emitted by the relaxing electrons. The emitted light is in the visible spectrum, so you will see different colored flames for the different metals. At the end of the lab, you will measure the emission spectrum of a sparkler and use the data you collected from the metal...
02:05
Metal Flame Emission - Instructor Prep
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Lab Preparation for Metal Flame Emission TestingExpand Here, we show the laboratory preparation for 10 students working in groups of 5, with some excess. Please adjust quantities as needed. Put on a lab coat, safety glasses, and nitrile gloves. Barium, copper, and strontium require special disposal, so place an appropriate waste container and a wash bottle of deionized water in the waste hood. Prepare a...
09:22
Gas Chromatography (GC) with Flame-Ionization Detection
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Gas chromatography (GC) is used to separate and detect small molecular weight compounds in the gas phase. The sample is either a gas or a liquid that is vaporized in the injection port. Typically, the compounds analyzed are less than 1,000 Da, because it is difficult to vaporize larger compounds. GC is popular for environmental monitoring and industrial applications because it is very reliable and can be run nearly continuously.
01:52
Atomic Mass
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2020
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which are...
FAQs
The flame’s analytical role is a sequence of desolvation, vaporization, and dissociation. Desolvation removes the solvent from aerosol droplets, vaporization converts the remaining material into the gas phase, and dissociation separates compounds into individual atoms. This progression matters because elemental measurement depends on producing free atoms that can interact with element-specific radiation.
A nebulizer converts the liquid sample into a fine aerosol before it enters the flame. This form allows the flame to act on dispersed sample material rather than on the liquid as a single mass. The aerosol therefore provides the starting condition for solvent removal, vaporization, and compound dissociation during the subsequent atomization process.
Flame atomization produces mostly ground-state atoms, which are the atomic form used for interaction with element-specific radiation in atomic absorption spectroscopy. That interaction connects the prepared sample to elemental determination. By separating dissolved compounds into individual atoms, the process makes the target elements available for measurement rather than leaving them contained within their original chemical forms.
In a coupled system, the nebulizer introduces the liquid sample as an aerosol, and the flame converts its dissolved compounds into free atoms. Element-specific radiation then interacts with those atoms, allowing atomic absorption spectroscopy to support determination of the elements present. The atomization stage is therefore the sample-preparation step that makes spectroscopic elemental measurement possible.
The workflow begins with a liquid environmental sample, followed by aerosol production with a nebulizer. The flame then drives desolvation, vaporization, and dissociation, producing mostly ground-state atoms. These atoms interact with element-specific radiation, and the coupled atomic absorption approach is used to determine metals in the prepared environmental material.
Flame atomization supports metal determination in water, soil extracts, and other environmental materials. Its relatively simple operation and rapid analysis make it useful for monitoring contamination and assessing environmental quality. Results can also contribute to pollution-control and regulatory studies, where elemental information helps characterize environmental conditions and inform responses to contamination.