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Related Concept Videos

Sampling Methods: Sample Types01:18

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...
Sampling Plans01:23

Sampling Plans

Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...

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Related Experiment Video

Updated: Jun 22, 2026

Seawater Sampling and Collection
08:23

Seawater Sampling and Collection

Published on: June 17, 2009

Seawater sampling and collection.

Elena Zaikova1, Alyse Hawley, David A Walsh

  • 1Department of Microbiology and Immunology, University of British Columbia, Canada.

Journal of Visualized Experiments : Jove
|June 19, 2009
PubMed
Summary
This summary is machine-generated.

This video demonstrates efficient coastal marine water sampling techniques for diverse analyses, including biomass and nucleic acid studies. The described four-part collection series ensures comprehensive data acquisition for marine research.

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Area of Science:

  • Marine Biology
  • Oceanography
  • Environmental Science

Background:

  • Accurate marine water sample collection is crucial for understanding coastal ecosystems.
  • Standardized methods are needed for reliable downstream analyses like biomass concentration and genetic studies.

Purpose of the Study:

  • To document and demonstrate a comprehensive methodology for collecting coastal marine water samples.
  • To outline a multi-step processing protocol for various analytical applications.

Main Methods:

  • Utilized an A-frame derrick with a multi-purpose winch and Niskin/Go-Flo bottles for water collection.
  • Employed a Conductivity, Temperature, and Depth (CTD) sensor to characterize water masses.
  • Implemented a sequential sampling strategy, prioritizing trace gas collection to minimize outgassing.

Main Results:

  • Successfully collected marine water samples from Saanich Inlet at depths up to 215 meters.
  • Established a four-part sample collection series including trace gas, nutrient/chemistry/cell counts, and biomass filtration.
  • Each cast took approximately 1.5 hours, with the full series requiring about 6 hours.

Conclusions:

  • The documented method provides a robust framework for collecting diverse marine water samples.
  • This standardized approach supports reliable downstream analyses critical for marine research and monitoring.