1、Designation: D 1290 95 (Reapproved 2002)Standard Test Method forSediment in Water-Emulsion Polishes by Centrifuge1This standard is issued under the fixed designation D 1290; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、of last revision. A number 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 covers the determination of sedimentin water-emulsion polishes by means of a centrifuge.1.2 This
3、standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2
4、.1 ASTM Standards:D 1796 Test Method for Water and Sediment in Fuel Oils bythe Centrifuge Method (Laboratory Procedure)23. Significance and Use3.1 This test method determines the amount of sediment inwater-emulsion polishes. Sediment is generally believed tohave negative effects on water-emulsion po
5、lish properties.4. Apparatus4.1 Centrifuge and Tubes, conforming to Paragraphs 6.1 and6.2 on Centrifuge and Centrifuge Tubes of Test MethodD 1796.5. Sample5.1 The sample shall be thoroughly representative of thematerial in question, and the portion used for the test shall bethoroughly representative
6、 of the sample itself.6. Procedure6.1 Measure 100 mL of the water-emulsion wax into each oftwo centrifuge tubes and stopper the tubes. Balance the twotubes in their holders.6.2 Place the two tubes on opposite sides of the head andwhirl for 10 min at a rate, calculated from the equation inParagraph 6
7、.1.3 under Centrifuge of Test Method D 1796,sufficient to produce a relative centrifugal force (rcf) ofbetween 500 and 700 at the tips of the whirling tubes (see Table2, Rotation Speeds Applicable for Centrifuges of VariousDiameters of Swing, of Test Method D 1796 for relationshipbetween diameter of
8、 swing, rcf, and rpm).6.3 Read the volume of sediment in each tube, estimating tothe nearest 0.1 mL if necessary. Record the average of the tworeadings as the percentage of sediment by the centrifugemethod.7. Precision and Bias7.1 PrecisionInterlaboratory and intralaboratory dupli-cate determination
9、s of sediment by this test method should notdiffer by more than 0.2 mL.7.2 BiasThis test method has no bias because the resultsdeveloped are defined in terms of this test method.8. Keywords8.1 centrifuge; polishes; sediment; water-emulsions1This test method is under the jurisdiction of ASTM Committe
10、e D21 on Polishesand is the direct responsibility of Subcommittee D21.03 on Chemical and PhysicalTesting.Current edition approved Dec. 10, 1995. Published March 1996. Originallypublished as D 1290 53 T. Last previous edition D 1290 82 (1991)e1.2Annual Book of ASTM Standards, Vol 05.01.1Copyright AST
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14、at your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 1290 95 (2002)2
