ASTM E727-2002 Standard Test Methods for Determining Bulk Density of Granular Carriers and Granular Pesticides《粒状载体与粒状农药的体积密度的标准试验方法》.pdf

1、Designation: E 727 02Standard Test Methods forDetermining Bulk Density of Granular Carriers andGranular Pesticides1This standard is issued under the fixed designation E 727; 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 These test methods are used to determine bulk density ofgranular carriers and granular pesticides by measuring eit

3、herfree-fall bulk density (Test MethodA) or loose-fill bulk density(Test Method B).1.2 This 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

4、determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements see Section 4.2. Referenced Documents2.1 ASTM Standards:2E 725 Test Method for Sampling Granular Carriers andGranular Pesticides3. Significance and Use3.1 These test method is designed principally with

5、 clay,corncob, nut shell, paper-based or sand granular carriers, andgranular pesticide products, but need not be limited to thesematerials. There may be more appropriate test methods forother types of granular carriers or pesticide products. Thedifferences in the following test methods are slight, b

6、ut theyoffer a choice of a recognized test procedure.4. Hazards4.1 Before testing granular pesticides, read the precaution-ary statements on the product label. Take proper precautions toprevent skin contact and inhalation of the fines and vapors.Take care to prevent contamination of the surrounding

7、area.Always wear the appropriate safety equipment and, whereindicated, wear respiratory devices approved by NIOSH for theproduct being tested.5. Summary of Test Method AFree-Fall Bulk Density5.1 A tared 500-mL cylinder is filled with the granularcarrier or granular pesticide. The weight of the sampl

8、e ismeasured and the bulk density calculated in pounds per cubicfoot or kilograms per cubic meter.6. Apparatus6.1 Balance, sensitivity of 1 g.6.2 Cylinder, graduated, capacity 500 mL. The cylindershould be calibrated at the 500-mL mark by using 500 g waterat 20C. The cylinder is cut off at the 500-m

9、L mark and groundsmooth.6.3 Funnel, powder, 6 in. (152 mm) in diameter at the top,bottom stem opening of 1-in. (25-mm) diameter, and sideshaving a slope of approximately 60.6.4 Spatula, large with 2-in. (51-mm) wide blade.6.5 Beaker, glass, metal, or plastic, 600-mL capacity.6.6 Pan, metal or plasti

10、c, 8 in. (203 mm) in diameter with2-in. (51-mm) sides to collect overflow of cylinder.6.7 Ring Stand and Ring Clamp.7. Procedure7.1 Weigh the 500-mL graduated cylinder and place it in theoverflow pan.7.2 Support the funnel on a ring which is then affixed to aring stand such that the top of the funne

11、l is horizontal andrigidly in position. Adjust the height of the funnel so that itsbottom position is 1.5 in. (38 mm) above the top center of the500-mL graduated cylinder.7.3 Hold a piece of flat metal (such as a wide spatula orsimilar tool) against the bottom of the funnel stem. Fill a600-mL beaker

12、 with a representative sample of the granularcarrier as defined in Test Method E 725 and pour into thefunnel. Quickly remove the metal plate, allowing the granulesto fall into the graduate of their own accord.7.4 Hold the graduate firmly and level off the granules to thetop of the graduate with the

13、straight edge of the spatula. Avoidjiggling or vibrating the cylinder.7.5 Tap the cylinder to tamp the particles into the cylinderaway from the top, to avoid spillage losses during handling.7.6 Reweigh the cylinder and determine the weight of thesample to the nearest 1 g.1These test methods are unde

14、r the jurisdiction of ASTM Committee E35 onPesticides and are the direct responsibility of Subcommittee E35.22 on PesticideEquipment.Current edition approved Oct 10, 2002. Published February 2003. Originallyapproved in 1980. Last previous edition approved in 1998 as E 727 91 ( 1998).2For referenced

15、ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh

16、ohocken, PA 19428-2959, United States.7.7 Determine the weight on duplicate samples.8. Calculation8.1 For the granular carrier or granular pesticide, calculatethe free-fall density as follows:Free2fall density lb/ft3!5grams granular material 3 0.125 (1)Free2fall density kg/m3!5grams granular materia

17、l 3 2.0 (2)9. Summary of Test Method BLoose-Fill Density ofGranular Materials9.1 A tared dry pint cup is filled to overflowing with agranular carrier or granular pesticide. The sample is leveled.The weight of the sample is measured and the bulk densitycalculated in pounds per cubic foot.10. Apparatu

18、s10.1 Filling Hopper, Ohaus Model 150.310.2 Cup, standard dry pint.10.3 Balance, sensitivity of 0.1 g.10.4 Straightedge.10.5 Catch Pan.11. Procedure11.1 Weigh the standard pint cup to the nearest 0.1 g (W1).11.2 Select 400 g of material in accordance with MethodE 725.11.3 Close the slide gate on the

19、 bottom of the Ohaus fillinghopper and pour the 400 g of material into the hopper.11.4 Position the dry pint cup below the gate so the cup iscentered and 2 in. below the gate. Place a catch pan below thecup to catch any sample overflow.11.5 Open the gate quickly and let the sample fill the cupand ov

20、erflow. Do not vibrate the cup or close the gate before allof the sample flows out of the hopper.11.6 Level the material in the cup with a straightedge usinga gentle sawing motion.11.7 Weigh the cup to the nearest 0.1 g (W2).12. Calculation12.1 For the granular carrier or granular pesticide, calcula

21、tethe loose-fill bulk density as follows:Bulk density lb/ft3!5W22 W1! 3 0.113 (3)Bulk density kg/m3!5W12 W2! 3 0.1.82 (4)13. Precision and Bias13.1 These test methods yield comparative data. The pass/fail aspect of these procedures should be determined byapplicable specifications.14. Disposal of Sam

22、ples14.1 After testing, store all materials in a safe manner anddispose of used material in accordance with product labeldirections, or material safety data sheets, or both.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentione

23、din this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and

24、must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of

25、theresponsible technical committee, which you may attend. If you feel that 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 C

26、700, 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).3The sol

27、e source of supply of the apparatus known to the committee at this timeis Ohaus Scales, 29 Hanover Rd., Florham Park, NJ 07932. If you are aware ofalternative suppliers, please provide this information to ASTM Headquarters. Yourcomments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend.E727022