What is flame atomizer in AAS?

What is flame atomizer in AAS?

In a flame atomizer, a solution of the sample is nebulized by a flow of gaseous oxidant, mixed with a gaseous fuel, and carried into a flame where atomization occurs. As shown in Figure, a complex set of interconnected processes then occur in the flame.

What is atomization in Atomic Absorption Spectroscopy?

The fine mist is carried to the atomizer, such as a flame, by a carrier gas. When the mist reaches the flame, the intense heat breaks up the sample into its individual atoms. This final process is called atomization.

How is the principle of Atomic Absorption Spectroscopy related to flame test?

AAS Theory. When a small amount of a solution of a metal ion is placed in the flame of a Bunsen burner, the flame turns a color that is characteristic of the metal ion. A sodium solution gives a yellow color, a potassium solution results in a violet color, a copper solution gives a green color, etc.

What is the difference between flame emission spectroscopy and Atomic Absorption Spectroscopy?

In absorption, the energy imparted to the atom (h,,) is derived from the light source, whereas in emission this energy is primarily imparted to the atom in the atomization-excitation source.

What is the maximum temperature in flame atomizer?

After pyrolysis, the furnace is rapidly heated to the atomization temperature to volatilize the analyte into the atom cell. The atomization temperature can be anywhere in the range of a few hundred to about 2700 °C. The analyte then absorbs light from the hollow cathode lamp to give the atomic absorption.

What are the types of atomization methods?

Some atomization methods are described below.

• Flame method Atomizes with flame.
• Electric heating furnace method Atomizes with current.
• Hydride generation method Application of the frame method (uses a chemical reaction to vaporize the specific element)
• Reduction-vaporization method …

What is the purpose of a flame test?

The purpose of The Flame Test is to demonstrate to students the variety of colors produced when different metals or salts meet a flame. It contributes to their understanding of: Energy. Electromagnetic Spectrum.

What are the components of flame spectroscopy?

These processes include: (1) excitation and emission of radiation by MX(g) molecules, (2) reaction of M(g) atoms with flame components at high temperatures to produce molecules and ions that also absorb and emit radiation, and (3) formation of M+x ions, which, in addition to reducing the efficiency of free-atom …

What are the advantages of flame Atomic Absorption Spectroscopy?

The main advantages of AAS are that it is relatively inexpensive and easy to use, while still offering high throughput, quantitative analysis of the metal content of solids or liquids. This makes it suitable for use in a wide range of applications.

What is the principle of flame emission spectroscopy?

The principle of flame photometer is based on the measurement of the emitted light intensity when a metal is introduced into the flame. The wavelength of the colour gives information about the element and the colour of the flame gives information about the amount of the element present in the sample.

What are the advantages and disadvantages of flame atomizer?

The main advantages of FAAS with atomization in a common air–acetylene flame are the low operational costs and good analytical performance. The limitations of mono-elemental detection and the narrow range of linear response can be regarded as the disadvantages of this analytical method.

What are different stages of atomization process?

Atomisation processes, (a) gas, water or oil atomisation, (b and c) centrifugal atomisation, (d) vacuum atomisation, (e and f) ultrasonic atomisation, Two-fluid atomisation, where a molten metal is broken up into droplets by impingement of high-pressure jets of water, oil or gas (a).

What is the conclusion of the flame test?

Conclusion 1 Based on the experimental results, it is safe to conclude that various elements display different colors when exposed to a flame, and the presence of these colors is evidence of atomic emission. Also, there is a correlation between the wavelength of a particular element and the color it emits.

What are the limitations of flame test?

Limitations of the Flame Test The test cannot detect low concentrations of most ions. The brightness of the signal varies from one sample to another. For example, the yellow emission from sodium is much brighter than the red emission from the same amount of lithium. Impurities or contaminants affect the test results.

What is the basic principle of flame emission spectroscopy?

How does flame spectroscopy work?

In the flame emission spectroscope, the coloured light from a vaporised sample can be split to produce an emission spectrum . The different lines in an emission spectrum look like a coloured barcode. Each metal ion produces a unique emission spectrum.