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Determination of inorganic mercury by Atomic fluorescence spectrometry (AFS) (CAT#: STEM-ST-0144-WXH)

Introduction

With the periodic table symbol Hg, mercury is widely considered as one of the most toxic heavy metals in the world. Inorganic mercury occurs abundantly in the natural world, most commonly in mineral form as cinnabar and metacinnabar. <br />Some of the most commonly found inorganic mercury compounds include mercuric chloride, mercuric oxide and mercuric sulphide. These usually take the form of a white crystalline powder and can leach into soil after the erosion of rocks containing them, be transported great distances in water or emitted into the air when ores which host them are mined.




Principle

Atomic fluorescence spectroscopy (AFS) is the emission of radiation energy in the UV-visible region from gas-phase atoms that have been excited to higher energy levels by absorption of radiant energy. Usually, a flame is used to obtain the atom in a gaseous state. It is a radiative emission process that proceeds from the lowest singlet (S1) to the singlet ground state(S0).

Applications

Atomic Fluorescence Spectrometry (AFS) is an analytical technique that is primarily used to detect and quantify metals. It is an exceptionally sensitive technique that relies on exploiting the distinctive fluorescent spectra of each specific metal.

Procedure

1. Sample preparetion
2. Sample ionization
3. Detection

Materials

• Line Source
• Nebulizer-burner system
• Monochromators/Filters
• Detector, Amplifier, Readout