What are the official methods of moisture content determination
What Are the Official Methods of Moisture Content Determination?
Moisture content determination is a crucial step in various industries to ensure product quality and regulatory compliance. Vis/NIR spectroscopy is a non-destructive technique that offers rapid and accurate moisture analysis.
Official Methods for Moisture Content Determination
- Gravimetric Method (AOAC 925.10): This method involves drying a sample at a specific temperature and measuring the weight loss. It is commonly used in food, pharmaceutical, and agricultural industries.
- Karl Fischer Titration (ASTM E203): This method employs chemical titration to determine the moisture content of samples. It is sensitive and accurate, but it requires sample preparation and specialized equipment.
- Vis/NIR Spectroscopy (AOAC 992.15): This method utilizes electromagnetic radiation to measure molecular vibrations associated with water molecules. It is a non-destructive technique that provides real-time analysis and can be used for a wide range of samples.
- Microwave Drying (AOAC 934.01): This method exposes a sample to microwave energy, causing water molecules to vaporize and be collected. It is suitable for samples with high moisture content.
- Distillation Method (ASTM D95): This method involves heating a sample in a distillation flask and collecting the condensed water. It is commonly used for petroleum products and volatile solvents.
The choice of moisture content determination method depends on the sample type, accuracy requirement, and available equipment. Vis/NIR spectroscopy offers a versatile and efficient solution for various applications, providing accurate and rapid results without sample destruction.