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2、 86 (Reapproved 1999)An American National StandardStandard Test Method forOdor in Water 1This standard is issued under the fixed designation D 1292; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe
3、r in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method 2 covers the determination of the odor(that is, the property that affects the sense of smell) of water. A suggested system
4、 for classifying odors is given as Annex A1. The test method is applicable to the determination of odor intensity in terms of odor intensity index or threshold odor number.1.2 Effluents may carry a myriad of compounds, difficult to measure individually, which contribute to odor problems. Combination
5、s of compounds can cause an odor intensity or develop a characteristic that cannot be anticipated from odors of the individual substances.1.3 Because of the variation in human sensitivity, high precision in determining odor intensity is not possible. There will not always be agreement on odor charac
6、teristics by various testers. Odor analysis provides the tool to measure variation in odor intensity at a given sampling point. The degree of variation may indicate the magnitude or importance of an odor problem. Determining the cause of the variation or the source of the objectionable characteristi
7、c may define the odor problem better than analysis for individual compounds.1.4 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 appro- priate safety and health practices and dete
8、rmine the applica- bility of regulatory limitations prior to use. For specific hazard statements, see Note 1 under 10.1.2. Referenced Documents2.1 ASTM Standards:D 1066 Practice for Sampling Steam 3D 1129 Terminology Relating to Water 3D 1193 Specification for Reagent Water 31 This test method is un
9、der the jurisdiction of ASTM Committee D-19 on Water and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents in Water.Current edition approved Aug. 29, 1986. Published October 1986. Originally published D 1292 53 T. Last previous edition D 1292 80.2 This test method is base
10、d on a procedure proposed by the Dow Chemical Co.in a private communication.3 Annual Book of ASTM Standards, Vol 11.01.D 2777 Practice for Determination of Precision and Bias ofApplicable Methods of Committee D-19 on Water 3D 3370 Practices for Sampling Water from Closed Con- duits 33. Terminology3.
11、1 Definitions:3.1.1 The terms odor-intensity index and odor threshold number in this test method are defined in accordance with Terminology D 1129 as follows:3.1.2 odor-intensity indexthe number of times the concen- tration of the original sample is halved by addition of odor-free water to obtain th
12、e least definitely perceptible odor.3.1.3 odor threshold numberthe greatest dilution of the sample with odor-free water to yield the least definitely perceptible odor.3.1.4 For definitions of other terms used in this test method, refer to Terminology D 1129.4. Summary of Test Method4.1 A sample of w
13、ater is diluted with odor-free water untila dilution is obtained that has the least definitely perceptible odor. The test is made by two or more testers. One makes dilutions and the others determine odor intensity. Samples are tested in generally increasing concentration of odorant, al- though not i
14、n consecutive sequence of dilutions, until the odor is perceived. The persons making the test select the odorous sample from among three flasks, two of which contain odor- free water. Odor is measured without regard to the presence of suspended matter or immiscible substances in the sample. Cognizan
15、ce is taken of the fact that there is no absolute odor value and that the test is to be used for comparison only. Thetest is carried out at 40C.5. Significance and Use5.1 The odor of water is a subjective property which is recognized as having a significant effect on its quality. This test is intended to provide a reproducible test method for determin- ing the intensity of odor in waters for comparative or controlpurposes.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, We
