ASTM D 4148 : 1982 : R2004
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method
Hardcopy , PDF
11-11-2014
English
01-04-2004
Important note : All end users must be registered with an Account prior to user licenses being assigned.CONTAINED IN VOL. 11.06, 2017 Defines determining the density and taxonomic classification of phytoplankton.
| Committee |
E 47
|
| DocumentType |
Test Method
|
| Pages |
3
|
| ProductNote |
Reconfirmed 2004
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
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 10 oculars the maximum overall magnification is approximately 250. 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.
| ASTM D 1129 : 2013 : REDLINE | Standard Terminology Relating to Water |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.