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Significance and Use
5.1 Sulfate reducing archaea and bacteria are known to contribute to microbiologically influenced corrosion.
5.2 Sulfate-reducing bacteria are widely distributed in marine and fresh water muds which, in consequence, frequently are laden with the hydrogen sulfide produced by these organisms during dissimilatory sulfate reduction.
5.3 Traditional, culture-dependent methods such as those described in Test Methods , prescribe incubation periods of as long as 21 days before assigning a below detection limit (BDL) score to a specimen. Moreover, it is well known that not all SRP will proliferate in the nutrient media specified in Test Methods .
5.4 This test method uses ELISA technology to provide semi-quantitative, culture-independent, SRP bioburden test results in less than 30 min.
5.4.1 Because all the reagents and supplies used are non-hazardous and prepackaged for single test use, this test method does not require any apparatus other than a laboratory timer. Consequently, it can be performed at or near the point of sample collection.
5.4.2 The opportunity to minimize the delay between sample collection, testing, and results availability translates into timely use of the data to drive preventive and corrective SRB control measures.
1.1 This test method provides a protocol for using enzyme-linked immunosorbent assay (ELISA) technology to test water samples for the enzyme adenosine 5’-phosphosulfate reductase (APSr) concentration.
1.1.1 APSr is present in all known sulfate reducing protists (SRP – sulfate reducing bacteria – SRB – and sulfate reducing archaea – SRA).
1.1.2 As reported in U.S. Patent 4,999,286, APS reductase concentration can be used as a surrogate parameter for estimating SRA bioburdens ( compares results from Test Methods , , and quantitative polymerase chain reaction – qPCR – testing).
1.2 This test method has been validated in tap water, oilfield produced water (salinities ranging from 100 g L-1 to 600 g L-1), and fuel-associated water (commonly referred to as bottoms-water).
1.3 This test method detects APS reductase semi-quantitatively in the range of 0.001M to 0.1M – correlating to 102 SRP/mL to 106 SRP/mL.
1.3.1 As described in test method sensitivity can be increased 10-fold to 100-fold. However, the precision statistics provided in X apply only to 10-mL specimens.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Some specific hazards statements are given in Section on Hazards.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1129 Terminology Relating to Water
D4412 Test Methods for Sulfate-Reducing Bacteria in Water and Water-Formed Deposits
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
D6499 Test Method for Immunological Measurement of Antigenic Protein in Hevea Natural Rubber (HNR) and its Products
D7464 Practice for Manual Sampling of Liquid Fuels, Associated Materials and Fuel System Components for Microbiological Testing
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method
E1847 Practice for Statistical Analysis of Toxicity Tests Conducted Under ASTM Guidelines
E1914 Practice for Use of Terms Relating to the Development and Evaluation of Methods for Chemical Analysis
ICS Number Code 07.100.20 (Microbiology of water)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D8243-19, Standard Test Method for Determination of APS Reductase to Estimate Sulfate Reducing Bacterial Bioburdens in Water – Enzyme-Linked Immunosorbent Assay Method, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top