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There are many research methods available to psychologists in their efforts to understand, describe, and explain behavior and the cognitive and biological processes that underlie it.

Sample Preparation for Analysis: Advanced Techniques

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...

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Updated: Jul 5, 2026

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Published on: September 11, 2016

Case studies in forensic soil examinations.

Nicholas Petraco¹, Thomas A Kubic, Nicholas D K Petraco

¹New York City Police Department Crime Laboratory, Trace Evidence Unit, 150-14 Jamaica Avenue, Jamaica, NY 11432, United States. nlp101648@aol.com

Forensic Science International

|May 21, 2008

Summary

This summary is machine-generated.

This study details a straightforward forensic soil analysis method. The technique aids in comparing soil samples to determine common origin, crucial for legal investigations.

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Area of Science:

Forensic Science
Geology
Materials Analysis

Background:

Forensic soil analysis is vital for linking suspects to crime scenes.
Standardized and accessible methods are needed for reliable comparisons.

Purpose of the Study:

To present a modified, simple, and effective procedure for forensic soil examination.
To demonstrate the application of this method in evaluating the common origin of soil samples.

Main Methods:

Preliminary observation, artifact removal, and sieving of soil specimens.
Fractionation of a specific size range for color matching, polarized light microscopy (PLM) particle counting, and gradient comparison.
Application of the modified method in case studies.

Main Results:

The described procedure allows for detailed comparison of soil characteristics.
Case reviews illustrate the method's utility in assessing the likelihood of common origin.
The modified technique is user-friendly and adaptable.

Conclusions:

The developed soil analysis method is effective for forensic casework.
This approach enhances the ability to establish links between questioned and known soil samples.
The procedure's simplicity facilitates its adoption and modification by other laboratories.