1、Designation: E288 10Standard Specification forLaboratory Glass Volumetric Flasks1This standard is issued under the fixed designation E288; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in paren
2、theses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers requirements for glass volu-metric flasks o
3、f precision and general-purpose grades suitablefor laboratory purposes.1.1.1 Class AEach flask of precision grade shall bemarked with the letter “A” to signify compliance with appli-cable construction and accuracy requirements. Flasks may bemarked with an identification number (serial number) at the
4、option of the manufacturer.1.1.2 Class BGeneral purpose flasks are of the same basicdesign as Class A flasks. However, volumetric tolerances forClass B flasks shall be within twice the specified range allowedfor Class A flasks. These flasks need not be marked with theirclass designation.NOTE 1Specif
5、ications for micro volumetric flasks in sizes from 1 mLto 25 mL, inclusive, are given in Specification E237.NOTE 2The Twelfth General (International) Conference on Weightsand Measures redefined the litre as a “special name for the cubicdecimetre,” but agreed to permit continuance of the terms litre,
6、 millilitre,and mL, except in association with measurements of the highest precision.For volumetric glassware the difference between the old and newmeanings of litre is negligible. Therefore, either mL or cm3may bemarked on ware covered by this Specification.1.1.3 Special Size FlasksPrecision grade
7、flasks may bemanufactured with nominal capacities not listed in this stan-dard. Such flasks shall be considered “Class A” flasks, pro-vided they meet the accuracy tolerance of the next largest“Class A” flask appearing in Table 1 and comply with themarking requirements of 1.1.1.1.1.4 Wide-Mouth Flask
8、sRequirements for insertion oftablets or capsules for assay dilution and to accommodateaccess of larger diameter pipets require volumetric flasks withlarger necks. These flasks appear in Table 2. These flasks shallconform to the marking requirements of 1.1.1.Additionally, theaccuracy tolerance shall
9、 be marked on each “Class A” wide-mouth flask.1.1.5 Special Size Wide-Mouth FlasksPrecision gradewide-mouth flasks may be manufactured with nominal capaci-ties not listed in this standard. Such flasks shall be considered“Class A” flasks provided they meet the accuracy tolerance ofthe next largest “C
10、lass A” wide-mouth flask appearing in Table2 and the marking requirements of 1.1.4.2. Referenced Documents2.1 ASTM Standards:2E237 Specification for Laboratory Glass MicrovolumetricVessels (Volumetric Flasks and Centrifuge Tubes)E438 Specification for Glasses in Laboratory ApparatusE542 Practice for
11、 Calibration of Laboratory VolumetricApparatusE675 Specification for Interchangeable Taper-Ground Stop-cocks And StoppersE694 Specification for Laboratory Glass Volumetric Appa-ratusE920 Specification for Commercially Packaged LaboratoryApparatusE921 Specification for Export Packaged Laboratory Appa
12、-ratusE1133 Practice for Performance Testing of Packaged Labo-ratory Apparatus for United States Government Procure-mentsE1157 Specification for Sampling and Testing of ReusableLaboratory Glassware3. General Requirements3.1 CalibrationFlasks shall be calibrated in accordancewith the methods outlined
13、 in Practice E542.4. Design4.1 Flasks shall be designed in accordance with Specifica-tions E438 and E694. Flask necks may be designed with eithertaper-ground joints to accept stopper sizes specified in Table 1or they may have reinforced rims or screw threads for1This specification is under the juris
14、diction of ASTM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1965. Last previous edition approved in 2006 as E288 06. DOI:10.1520/E0288-10.2For referenced AST
15、M 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 Conshoho
16、cken, PA 19428-2959, United States.acceptance of cap style closures. The neck may be eitherstraight sided or provided with a mixing bulb located above thegraduation line (intermediate bulb style). Any cross section ofthe neck taken in a plane parallel to the base shall be circular;similar sections o
17、f the body shall be either circular or square.The shape shall permit complete emptying and thoroughcleaning. The bottom or base shall be such that the volumetricflask will stand solidly on a level surface. The area of thebottom or base shall be of sufficient size so that the volumetricflask (except
18、the 10-mL flask), when empty and withoutstopper, shall stand on an inclined plane of 15 to thehorizontal. The 10-mL flask shall stand on an inclined plane of10 to the horizontal.4.2 Intermediate Bulb Style FlasksThe bulb in the neck ofan Intermediate Bulb-style flask shall hold approximately 10 %of
19、the nominal capacity for sizes up to 1000 mL, inclusive, and5 % of the nominal capacity for the 2000-mL size.4.3 StoppersWhere stoppers are provided they may beeither glass or plastic, as desired by the user. Stoppers shallprevent leakage of liquid when flask is inverted or shaken andconform to Spec
20、ification E675.4.4 DimensionsFlasks shall conform to the essential di-mensions given in Table 1.4.5 MarkingsAll markings shall be permanent and leg-ible.4.5.1 Capacity LineThe capacity line shall be sharplydefined and of uniform width (maximum 0.6 mm) in a planeparallel to the base of the flask. The
21、 line shall be applied by oneof the following methods: etched and filled with a permanentpigment; engraved; etched or engraved through a verticalcolored stripe fused into the glass; by application of a stainfired into the glass without etching; by application of enamelwhich is fused on the glass wit
22、hout etching. The line shallcompletely encircle the flask except when the line consists ofstain or enamel. If of stain or enamel, the line shall extend aminimum of 90 % of the neck circumference.4.5.2 Identification MarkingsEach flask, marked by oneof the methods given in 4.5.1 shall show the manufa
23、cturersname or trademark, the nominal capacity, the word “contains”or the symbol “TC,” and the temperature of calibration, that is,20C. Stoppers shall be marked with the identification of themanufacturer or seller and size; molded raised letters andnumbers may be used. In order to avoid confusion, w
24、ide neckflask tolerance must be marked on each flask as a requirement.4.5.3 Laboratory Marking SpotEach flask shall have anarea roughened by blasting or enameled to provide a suitablearea for laboratory marking.5. Sampling and Testing5.1 For sampling and testing refer to Specification E1157.6. Packa
25、ging6.1 For packaging select from one of Specification E920,Specification E921, or Practice E1133.TABLE 1 Requirements for Volumetric FlasksCapacity,mLClass ACapacityTolerance,6mLClass BCapacityTolerance,6mLMaximumInsideDiameterof Neck atCapacity Line,mmPosition of Capacity LineStopper SizeStraight-
26、Neck StyleMinimum DistancefromIntermediate Bulb StyleMinimum DistancefromTop ofNeck,mmBody,mmMixingBulb,mmBody,mm5 0.02 0.04 8.25 22 5 . . 8 or 910 0.02 0.04 8.25 28 7 . . 925 0.03 0.06 8.25 35 7 . . 950 0.05 0.10 10.00 40 8 10 8 9100 0.08 0.16 12.30 40 10 10 10 13200 0.10 0.20 15.00 45 10 10 10 162
27、50 0.12 0.24 15.00 45 10 10 10 16500 0.20 0.40 18.20 60 15 10 10 191000 0.30 0.60 20.00 60 15 10 10 222000 0.50 1.00 25.50 60 15 10 15 27TABLE 2 Requirements for “Wide Mouth” Volumetric FlasksCapacity,mLClass ACapacityTolerance,6mLClass BCapacityTolerance,6mLMaximumInsideDiameterof Neck atCapacity L
28、ine,mmPosition of Capacity LineStopper SizeStraight-Neck StyleMinimum DistancefromIntermediate Bulb StyleMinimum DistancefromTop ofNeck,mmBody,mmMixingBulb,mmBody,mm5 0.08 0.16 12.30 22 5 . . 1310 0.08 0.16 12.30 28 7 . . 1325 0.08 0.16 12.30 35 7 . . 1350 0.08 0.16 12.30 40 8 10 8 13100 0.10 0.20 1
29、5.0 40 10 10 10 16200 0.20 0.40 18.5 45 10 10 10 19250 0.20 0.40 18.5 45 10 10 10 19E288 1027. Keywords7.1 flasks; glass; volumetricASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard
30、 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 must be reviewed every five years andif n
31、ot 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 theresponsible technical committee, which
32、 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 C700, West Conshohocken, PA 19428-2959,Uni
33、ted 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).E288 103
