Investigation of Laser ablation processes by Atomic emission spectroscopy (AES) (CAT#: STEM-ST-0174-WXH)

Introduction

ICP–AES is a viable technology for studying fundamental laser ablation processes at atmospheric pressure. Spectral emission intensity in the ICP is proportional to the quantity of mass ablated from sample, assuming the mass does not change the ICP excitation characteristics. Studying the relation between composition and quantity of ablated mass vs. laser properties (such as laser fluence, power density, wavelength, and pulse duration) will aid in understanding laser ablation mechanisms. The ICP is a unique source for chemical analysis applications and studying fundamental mechanisms.

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Principle Applications Procedure Materials Notes Related Products

Principle

Atomic emission spectroscopy (AES) is a method of chemical analysis that uses the intensity of light emitted from a flame, plasma, arc, or spark at a particular wavelength to determine the quantity of an element in a sample. The wavelength of the atomic spectral line in the emission spectrum gives the identity of the element while the intensity of the emitted light is proportional to the number of atoms of the element. The sample may be excited by various methods.

Applications

Common applications of atomic emission spectroscopy are in the analysis of trace elements in soils, water, metals, biological specimens, clinical specimens, food, physical evidence such as glass, and other solids.

Procedure

1. Prepare sample for analysis
2. Convert solution into aerosol
3. Introduce aerosol into excitation source
4. Atomization and excitation
5. Detection of emission lines

Materials

• ICP (Inductively Coupled Plasma) source
• Atomizer
• Monochromators
• Detectors
• Amplifiers

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