ASTM D4148-82(1998)
- Standard Test Method for Analysis of Phytoplankton in Surface Water by the Sedgwick-Rafter Method
- standard by ASTM International, 10/10/1998
- Publisher: ASTM
$23.00$46.80
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.
Related Products
ASTM D4330-94(2002)
Standard Practice for Evaluation of Fiberglass Boat Polish and Wax..
$26.00 $52.80
ASTM B187/B187M-02
Standard Specification for Copper, Bus Bar, Rod, and Shapes and General Purpose Rod, Bar, and Shapes..
$26.00 $52.80
ASTM Volume 05.05:2016
ASTM Book of Standards Volume 05.05: Petroleum Products, Lubricants, and Fossil Fuels: Combustion Ch..
$156.00 $312.00
ASTM D4512-99
Standard Test Method for Vibrated Apparent Packing Density of Fine Catalyst and Catalyst Carrier Par..
$23.00 $46.80