Analysis Techniques |
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Several techniques are used to assess the degree and nature of contaminating particles as collected on filters. If you are following a regulated method, this method may dictate the analysis technique. Refer to the online guide to Regulated Analytical Methods.
Ultimately, you will choose a technique based on any of several factors:
- Size of contaminating particles
- Heterogeneity of particle population
- Number of samples/throughput needs
- Skill/experience level of the analyst
- Need to determine source of contamination
- Microscope-Based Techniques
Microscope-based techniques, including optical microscopy and scanning electron microscopy, are best for determining the size distribution and nature of contaminating particles and the source of contamination.
- Particle Identification
This section provides a high-level overview of particle characteristics commonly used to identify contaminants by microscopy and other methods.
- Colorimetric Patch Method
Colorimetric methods are widely used for monitoring hydraulic fluids and aviation fuels.
- Particle Gravimetric Analysis
This section describes how to select filters, prepare samples, and calculate results of gravimetric analysis, one the most widely used methods for air and liquid monitoring.