Atomic Absorption Spectroscopy AAS
Purpose of AAS
Atomic Absorption Spectroscopy (AAS) is a type of analytical technique used to determine the concentration of elemental metals in various samples. It is widely accepted and employed in numerous industries due to its accuracy and reliability. AAS utilizes a sample vaporization and atomization process, followed by the measurement of absorbed light by these atoms at specific wavelengths.
Official Methods of Moisture Content Determination
ASTM International and AOAC International have established official methodologies for determining moisture content. These methods are outlined below:
- Karl Fischer Titration: This technique measures the amount of water present in a sample via a chemical reaction. It is extensively employed in the pharmaceutical and food industries.
- Loss on Drying: This method involves heating a sample at a specific temperature over an extended period and calculating moisture content based on the mass loss.
Advantages of AAS
- High sensitivity and accuracy
- Versatility; applicable for a wide range of elements
- Efficient analysis speed
- Minimal sample preparation requirements
- Established official methods for moisture content determination
Applications of AAS
AAS finds application in diverse fields, including:
- Environmental monitoring: Analyzing heavy metals in water, soil, and air
- Food safety: Determining mineral content and detecting contaminants
- Pharmaceutical industry: Ensuring drug purity and potency
- Geochemistry: Studying elemental composition of rocks and minerals