ASTM-D4412 Standard Test Methods for Sulfate-Reducing Bacteria in Water and Water-Formed Deposits

ASTM-D4412 - 2019 EDITION - CURRENT
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Standard Test Methods for Sulfate-Reducing Bacteria in Water and Water-Formed Deposits
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Scope

1.1 These test methods cover the procedure for the detection and enumeration by the most probable number (MPN) technique of sulfate-reducing bacteria in water or water-formed deposits.

1.2 Two media preparations are provided. Medium A which is prepared with reagent grade water, and Medium B which is prepared using the water to be sampled as the water source. Medium B is offered for those special conditions where sulfate-reducing bacterial strains have adapted to atypical non-fresh water environment.

1.3 For the isolation and enumeration of thermophilic sulfate-reducing bacteria encountered in waters associated with oil and gas production, all broths, dilution blanks, and incubations must be maintained at tempertures of at least 45°C and preferably within 5° at the sample temperature.

1.4 The sensitivity of these test methods can be increased by purging the dilution blanks and tubes of media with nitrogen immediately prior to use.

1.5 The analyst should be aware that adequate collaborative data for precision and bias statements as required by Practice D2777 are not provided. See Section 11 for details.

1.6 This standard does not purport to address all of the safety concerns, 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.

Keywords

water; water-formed deposits; sulfate; sulfate-reducing bateria

To find similar documents by ASTM Volume:

11.02 (Water (II))

To find similar documents by classification:

07.100.20 (Microbiology of water Examination of biological properties of water, see 13.060.70)

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Document Number

ASTM-D4412-19

Revision Level

2019 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Dec. 1, 2019

Document Type

Test Method

Page Count

4 pages

Committee Number

D19.24