ASTM E 729 : 1996 : R2014
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Guide for Conducting Acute Toxicity Tests on Test Materials with Fishes, Macroinvertebrates, and Amphibians
Hardcopy , PDF
02-27-2023
English
12-04-2014
CONTAINED IN VOL. 11.06, 2014 Specifies procedures for obtaining laboratory data concerning the adverse effects of a test material added to dilution water, but not to food, on certain species of freshwater and saltwater fishes, macroinvertebrates, and amphibians during 2 to 8-day exposures, depending on the species.
Committee |
E 50
|
DocumentType |
Guide
|
Pages |
22
|
ProductNote |
Reconfirmed 2014
|
PublisherName |
American Society for Testing and Materials
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Status |
Superseded
|
SupersededBy | |
Supersedes |
1.1This guide (1)2 describes procedures for obtaining laboratory data concerning the adverse effects (for example, lethality and immobility) of a test material added to dilution water, but not to food, on certain species of freshwater and saltwater fishes, macroinvertebrates, and amphibians during 2 to 8-day exposures, depending on the species. These procedures will probably be useful for conducting acute toxicity tests with many other aquatic species, although modifications might be necessary.
1.2Other modifications of these procedures might be justified by special needs or circumstances. Although using appropriate procedures is more important than following prescribed procedures, results of tests conducted using unusual procedures are not likely to be comparable to results of many other tests. Comparison of results obtained using modified and unmodified versions of these procedures might provide useful information concerning new concepts and procedures for conducting acute tests.
1.3This guide describes tests using three basic exposure techniques: static, renewal, and flow-through. Selection of the technique to use in a specific situation will depend on the needs of the investigator and on available resources. Tests using the static technique provide the most easily obtained measure of acute toxicity, but conditions often change substantially during static tests; therefore, static tests should not last longer than 96 h, and test organisms should not be fed during such tests. Static tests should probably not be conducted on materials that have a high oxygen demand, are highly volatile, are rapidly transformed biologically or chemically in aqueous solution, or are removed from test solutions in substantial quantities by the test chambers or organisms during the test. Because the pH and concentrations of dissolved oxygen and test material are maintained at desired levels and degradation and metabolic products are removed, tests using renewal and flow-through methods are preferable and may last longer than 96 h; test organisms may be fed during renewal and flow-through tests. Although renewal tests might be more cost-effective, flow-through tests are generally preferable.
1.4Acute tests may be performed to meet regulatory data requirements or to obtain time-independent estimates of toxicity.
1.4.1If the objective is to obtain data to meet regulatory requirements, it may be necessary to limit the number of observation times based on stipulations of the regulatory agency and cost considerations.
1.4.2If the objective of an acute toxicity test is to determine a time-independent (that is, incipient, threshold, or asymptotic) toxicity level, an appropriate number of observations must be taken over an exposure duration of sufficient length to establish the shape of the toxicity curve or allow the direct or mathematically estimated determination of a time-independent toxicity value (1), or both.
1.5In the development of these procedures, an attempt was made to balance scientific and practical considerations and to ensure that the results will be sufficiently accurate and precise for the applications for which they are commonly used. A major consideration was that the common uses of the results of acute toxicity tests do not require or justify stricter requirements than those set forth herein. Although the tests may be improved by using more organisms, longer acclimation times, and so forth, the requirements presented herein should usually be sufficient.
1.6Results of acute toxicity tests should usually be reported in terms of an LC50 (median lethal concentration) or EC50 (median effective concentration) at the end of the test, but it is desirable to provide information concerning the dependence of adverse effects on both time and concentration. Thus, when feasible, flow-through and renewal tests should be conducted so that LC50s or EC50s can be reported from 6 h to an asymptotic (time-independent, threshold, incipient) value, if one exists. In some situations, it might only be necessary to determine whether a specific concentration is acutely toxic to the test species or whether the LC50 or EC50 is above or below a specific concentration.
1.7This guide is arranged as follows:
Section | |
Referenced Documents | 2 |
Terminology | 3 |
Summary of Guide | 4 |
Significance and Use | 5 |
Apparatus | 6 |
Facilities | 6.1 |
Special Requirements | 6.2 |
Construction Materials | 6.3 |
Metering System | 6.4 |
Test Chambers | 6.5 |
Cleaning | 6.6 |
Acceptability | 6.7 |
Hazards | 7 |
Dilution Water | 8 |
Requirements | 8.1 |
Source | 8.2 |
Treatment | 8.3 |
Characterization | 8.4 |
Test Material | 9 |
General | 9.1 |
Stock Solution | 9.2 |
Test Concentration(s) | 9.3 |
Test Organisms | 10 |
Species | 10.1 |
Age | 10.2 |
Source | 10.3 |
Care and Handling | 10.4 |
Feeding | 10.5 |
Disease Treatment | 10.6 |
Holding | 10.7 |
Acclimation | 10.8 |
Quality | 10.9 |
Procedure | 11 |
Experimental Design | 11.1 |
Dissolved Oxygen | 11.2 |
Temperature | 11.3 |
Loading | 11.4 |
Beginning the Test | 11.5 |
Feeding | 11.6 |
Duration of Test | 11.7 |
Biological Data | 11.8 |
Other Measurements | 11.9 |
Analytical Methodology | 12 |
Acceptability of Test | 13 |
Calculation of Results | 14 |
Report | 15 |
1.8The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.9This 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. Specific hazard statements are given in Section 7.
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