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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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Related Experiment Video

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Author Spotlight: Diatom Testing for Forensic Drowning Examination
04:20

Author Spotlight: Diatom Testing for Forensic Drowning Examination

Published on: November 10, 2023

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[Diatom Detection Using Enzyme Combined with Strong Acid Digestion Method].

J Yao1, W J Kan1

  • 1Institute of Forensic Science, Nantong Public Security Bureau, Nantong 226007, China.

Fa Yi Xue Za Zhi
|December 13, 2017
PubMed
Summary

The enzyme combined with strong acid digestion method effectively detects diatoms in drowning cases. This improved method offers faster digestion and higher detection rates compared to traditional techniques.

Keywords:
diatom; strong acid digestion methoddrowningenzymatic digestion methodforensic pathology

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Area of Science:

  • Forensic Science
  • Microbiology
  • Toxicology

Background:

  • Diatom analysis is crucial for determining drowning as a cause of death.
  • Traditional methods for diatom detection have limitations in efficiency and sensitivity.

Purpose of the Study:

  • To evaluate the efficacy of an enzyme combined with strong acid digestion method for diatom detection in drowning victims.
  • To compare this novel method with existing strong acid and enzymic digestion techniques.

Main Methods:

  • Collected samples from 40 drowning cases, including lung, liver, kidney, and scene water.
  • Applied strong acid digestion, enzyme combined with strong acid digestion, and enzymic digestion methods.
  • Analyzed digestion time, digestive power, and diatom detection rates.

Main Results:

  • The enzyme combined with strong acid digestion method demonstrated significantly shorter digestion times and superior digestive power compared to enzymic digestion.
  • This combined method also showed a markedly higher diatom detection rate than the strong acid digestion method.

Conclusions:

  • The enzyme combined with strong acid digestion method integrates the benefits of both strong acid and enzymic digestion.
  • This technique is safer, causes less environmental pollution, and is recommended for wider application in forensic diatom analysis.