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Sampling Methods: Sample Types

Sampling Methods: Sample Types

Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...

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Related Experiment Video

Updated: May 30, 2026

Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions

Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions

Published on: January 7, 2019

Do we really need SEVEN new aerosol particle sampling conventions?

David L Bartley

The Annals of Occupational Hygiene

|August 12, 2011

Summary

New aerosol particle sampling conventions aim to improve human respiratory tract dose estimation. These methods account for individual variations and particle sizes, enhancing workplace exposure assessments and health response correlations.

Area of Science:

Occupational Health and Safety
Environmental Science
Toxicology

Background:

Current aerosol particle sampling methods may not accurately reflect the dose deposited in specific regions of the human respiratory tract.
Understanding particle deposition is crucial for assessing potential health risks associated with airborne contaminants.

Purpose of the Study:

To discuss the rationale behind new aerosol particle sampling conventions.
To establish sampling methods that improve the estimation of inhaled particle dose to specific human respiratory tract regions.
To facilitate better correlation between workplace exposure assessments and subsequent health outcomes.

Main Methods:

The study discusses proposed aerosol particle sampling conventions.
These conventions consider inter- and intra-person variability in respiratory tract deposition.

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Particle sizes ranging from submicrometer to supermicrometer are addressed.

Main Results:

The proposed conventions are designed to estimate the dose delivered to specific respiratory tract regions before clearance or dissolution.
The methods accommodate significant variations among individuals and within the same individual over time.
A comprehensive range of particle sizes, from submicrometer to supermicrometer, is covered.

Conclusions:

The developed sampling conventions provide a framework for more accurate respiratory dose assessment.
These advancements aim to improve the development of personal sampling equipment.
The ultimate goal is to enhance the correlation between workplace air quality monitoring and observed health effects.