UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

ASTM International - ASTM D4148-82(1998)

Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method

inactive
Buy Now
Organization: ASTM International
Publication Date: 10 October 1998
Status: inactive
Page Count: 3
scope:

1.1 This test method covers determining the density and taxonomic classification of phytoplankton. It is applicable both to relatively sparse or dense phytoplankton concentrations, provided the suspended-sediment concentration is low. The Sedgwick Rafter (S-R) method requires less costly apparatus than does the inverted microscope method but gives less accurate results. The inherent inaccuracy in the Sedgwick-Rafter method is due to the design of the counting chamber and cannot be circumvented by a different choice of optics. For this reason, the S-R method is limited to the use of objective lenses having a working distance of approximately 1.6 mm or more. With 10X oculars the maximum overall magnification is approximately 250X. High concentrations of suspended sediment can obscure the algal cells, and thus cause interference.

1.2 This test method is applicable to both freshwater and marine samples.

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary information see Section 8.

Document History

September 1, 2012
Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method (Withdrawn 2020)
1.1 This test method covers determining the density and taxonomic classification of phytoplankton. It is applicable both to relatively sparse or dense phytoplankton concentrations, provided the...
April 1, 2004
Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method
1.1 This test method covers determining the density and taxonomic classification of phytoplankton. It is applicable both to relatively sparse or dense phytoplankton concentrations, provided the...
ASTM D4148-82(1998)
October 10, 1998
Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method
1.1 This test method covers determining the density and taxonomic classification of phytoplankton. It is applicable both to relatively sparse or dense phytoplankton concentrations, provided the...
June 25, 1982
Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method
1.1 This test method covers determining the density and taxonomic classification of phytoplankton. It is applicable both to relatively sparse or dense phytoplankton concentrations, provided the...
Advertisement