ASTM D5905-98(R2018) pdf free download

ASTM D5905-98(R2018) pdf free download.Standard Practice for the Preparation of Substitute Wastewater
1. Scope
1.1 This practice covers the preparation of an aqueous mixture containing constituents in concentrations such that it will have physical and chemical matrix characteristics similar to municipal wastewater. 1.2 Wastewaters are extremely variable, depending on the quantity and nature of the materials being discharged into the collection system. The mixture prepared with this practice is not representative of any particular wastewater. Rather, it allows the user to prepare a mixture that exhibits a similar matrix impact on test method performance as is typical of municipal wastewater and can be prepared from common materials inexpensively and reproducibly. It allows the evalu- ation of test methods, over time, against the same reference point. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Significance and Use
4.1 Substitute wastewater may be used for laboratory testing where a reproducible mixture simulating municipal wastewater is required. To provide a more rugged evaluation of a test method’s ability to measure analytes and the precision of the test method under more demanding conditions, it is necessary to utilize a matrix more complex than reagent water. Substitute wastewater is intended to be used as a material to be spiked with analytes or interferents of interest to evaluate the perfor- mance of test methods. 4.2 Utilization of substitute wastewater as a matrix in interlaboratory validation studies will allow inclusion of per- formance statistics for this matrix in the Precision and Bias section of test methods. Users of test methods will be able to evaluate their application of test methods in this matrix against published results.
5. Apparatus
5.1 Blender, household or commercial variety, with a chemi- cally inert container and a tight sealing lid.
6. Reagents
6.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society where such specifications are available. 3 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of determination. 6.2 Purity ofWater—Unless otherwise indicated, references to water shall be understood to mean reagent water as defined by Type I of Specification D1193. 6.3 Kaolin—USP grade. Dry to constant weight at 103°C before use. 6.4 Beer—A commercially produced beverage made by fermenting mixtures of grains, malts, and hops; reduced calorie: less than 100 calories/12 oz (1180 J/mL). Reduced- calorie beers are often sold with the designation “lite” or “light.” Transfer the beer into a container and then cap, allowing 20 % head space. Shake vigorously. Loosen cap. Allow to sit refrigerated for 24 h to dissipate carbonation and then allow to reach room temperature. 6.5 Flour—General or all-purpose, bleached, enriched, pre- sifted, wheat. All brands fitting this description are acceptable. Dry to constant weight at 103°C before use. 6.6 Ocean Salts, Commercially available as dry salt mix- tures used to prepare water for salt water aquariums. Can be purchased at pet stores. Dry to constant weight at 103°C before use.