Sample Volume
Sample Volume - Related Videos
05:58
Large Volume (20L+) Filtration of Coastal Seawater Samples
0 Views •
Cited by 16 •
2009
This video documents large volume (≥20 L) filtration of microbial biomass, ranging between 0.22μm and 2.7μm in diameter, from the water column.
04:21
Small Volume (1-3L) Filtration of Coastal Seawater Samples
0 Views •
Cited by 7 •
2009
This video documents small volume (~1 L) filtration of microbial biomass from the water column.
03:48
Preparation of Retinal Samples for Volume Electron Microscopy
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2024
This protocol describes the detailed steps for preparing retinal samples for volume electron microscopy, focusing on the structural features of retinal photoreceptor terminals.
11:32
A Microfluidic Platform for Precision Small-volume Sample Processing and Its Use to Size Separate Biological Particles with an Acoustic Microdevice
0 Views •
Cited by 9 •
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This protocol describes a system architecture for performing automated small volume (0.15–1.5 ml) particle separations using a microfluidic device, and discusses methods to optimize acoustofluidic device performance and operation.
02:41
Constant Volume Calorimetry
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2020
Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
FAQs
Sample volume affects whether the amount of a target analyte collected is sufficient for reliable detection. When concentrations are low, an inadequate volume may not provide enough material for the analytical method to distinguish the analyte from the detection limit. Selecting a suitable volume therefore supports measurements that better reflect conditions in the sampled environment.
Analysts consider the target analyte, its expected concentration, the sample matrix, the required detection limit, and the analytical method. These factors interact: water, soil, sediment, and air may require different amounts, while low expected concentrations or demanding detection limits may require enough material to support dependable measurement. Volume selection must match the full analytical plan.
A larger collection is not automatically better because excessive material can complicate preservation, transport, and processing. Those complications may affect how efficiently the sample reaches analysis and increase handling demands. The goal is to collect enough material for reliable detection and representative measurement without creating unnecessary burdens that could interfere with subsequent sample management.
Begin by identifying the analyte and estimating its expected concentration. Then consider whether the material is water, soil, sediment, or air, along with the analytical method and required detection limit. Use these factors to choose a sufficient amount, and confirm that the selected volume can be preserved, transported, and processed appropriately after collection.
An appropriate amount of collected material helps measurements represent the sampled environmental material rather than an inadequately captured portion. This is important because environmental conditions can vary across locations. Using a suitable volume can help reduce sampling bias and improve the defensibility of results used to evaluate contamination or ecosystem conditions.
Volume selection matters in contamination assessments, regulatory compliance monitoring, ecosystem evaluations, and remediation studies. In each case, the collected material must support reliable analysis while remaining manageable during preservation, transport, and processing. During remediation monitoring, consistent and suitable choices can help produce results that are useful for assessing progress over time.