Capsule- and disk-filter procedure

Techniques of Water-Resources Investigations 9-A5



Capsule and disk filters are disposable, self-contained units composed of a pleated or woven filter medium encased in a polypropylene or other plastic housing that can be connected inline to a sample-delivery system (such as a submersible or peristaltic pump) that generates sufficient pressure (positive or negative) to force water through the filter. Filter media are available in several pore sizes, but 0.45 µm is the pore size used routinely for most studies at this time. Capsule or disk filters (table 5.2.1.A.1) are required routinely for most studies when filtering samples for trace-element analyses and are recommended when filtering samples for major-ion or other inorganic-constituent analyses.

Publication type Report
Publication Subtype USGS Numbered Series
Title Capsule- and disk-filter procedure
Series title Techniques of Water-Resources Investigations
Series number 9-A5
Sub-chapter 5.2.1.A
DOI 10.3133/twri9A55.2.1.A
Year Published 2016
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Office of Water Quality
Description 8 p.
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Chapter 5: Processing of water samples
Public Comments This report is Section 5.2.1.A of Chapter 5: Processing of water samples in Book 9: Handbooks for water-resources investigations
Online Only (Y/N) N
Additional Online Files (Y/N) N
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