Designati Designation: on: E 288 – 94 (Reapprov (Reapproved ed 1998) AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr., West Conshohocken, PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Laboratory Glass Volumetric Flasks1 This standard is issued under the fixed designation E 288; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Scope
E 1157 Specification for the Sampling Sampling and Testing Testing of Reus2 able Laboratory Glassware
1.1 This specification specification covers requirements requirements for glass volumetric flasks of precision and general-purpose grades suitable for laboratory purposes. Classs A—Eac 1.1.1 Clas —Each h flask flask of prec precis isio ion n grad gradee shal shalll be marked with the letter “A” to signify compliance with applicable construction and accuracy requirements. Flasks may be marked with an identification number (serial number) at the option of the manufacturer. 1.1.2 Class B—General purpose flasks are of the same basic design as Class A flasks. However, volumetric tolerances for Class B flasks shall be within twice the specified range allowed for Class A flasks. These flasks need not be marked with their class designation.
3. General Requirements Requirements 3.1 Calibration—Flasks —Flasks shall be calibrat calibrated ed in accordanc accordancee with the methods outlined in Practice E 542. 4. Design Design 4.1 Flasks Flasks shall be designed designed in accordance accordance with SpecificaSpecification tion E 694. 694. Flask Flask necks necks may be design designed ed with with either either tapertaperground joints to accept stopper sizes specified in Table 1 or they may have reinforced rims or screw threads for acceptance of cap style closures. The neck may be either straightsided or provided with a mixing bulb located above the graduation line (intermediate bulb style). Any cross section of the neck taken in a plane parallel to the base shall be circular; similar sections of the body shall be either circular or square. The shape shall permit complete emptying and thorough cleaning. The bottom or base shall be such that the volumetric flask will stand solidly on a level surface. The area of the bottom or base shall be of sufficient size so that the volumetric flask (except the 10-mL flask), flask), when when empty empty and withou withoutt stoppe stopper, r, shall shall stand stand on an inclined plane of 15° to the horizontal. The 10-mL flask shall stand on an inclined plane of 10° to the horizontal. 4.2 Intermediate Bulb Style Flasks—The bulb in the neck of an Intermediate Bulb-style flask shall hold approximately 10 % of the nominal capacity for sizes up to 1000 mL, inclusive, and 5 % of the nominal capacity for the 2000-mL size. 4.3 Stoppers—Where —Where stoppe stoppers rs are provid provided ed they they may be either glass or plastic, as desired by the user. Stoppers shall prevent leakage of liquid when flask is inverted or shaken. 4.4 Dimensions —Flasks shall conform to the essential dimensions given in Table 1. 4.5 Markings—All markings shall be permanent and legible. 4.5.1 Capacity —The capaci capacity ty line line shall shall be sharpl sharply y Capacity Line—The defined and of uniform width (maximum 0.6 mm) in a plane parallel to the base of the flask. The line shall be applied by one of the following methods: etched and filled with a permanent pigmen pigment; t; engrav engraved; ed; etched etched or engrav engraved ed throug through h a verti vertical cal colored stripe fused into the glass; by application of a stain fired into the glass without etching; by application of an enamel which which is fused fused on the glass without without etching. etching. The line line shall shall completely encircle the flask except when the line consists of stain or enamel. If of stain or enamel, the line shall extend a
NOTE 1—Specificatio 1—Specifications ns for microvolumetric microvolumetric flasks in sizes from 1 mL to 25 mL, inclusive, are given in Specification E 237. NOTE 2—The Twelfth General (International) Conference on Weights and and Meas Measur ures es rede redefin fined ed the the litr litree as a “spe “speci cial al name name for for the the cubic cubic decimetre,” but agreed to permit continuance of the terms litre, millilitre, and mL, except in association with measurements of the highest precision. For volumet volumetric ric glasswa glassware re the differ differenc encee betwee between n the old and new meaning meaningss of litre litre is negligi negligible. ble. Therefor Therefore, e, either either mL or cm3 may may be marked on ware covered by this Specification.
2. Referenced Documents 2.1 ASTM Standards: E 237 Specification for Microvolumetric Vessels Vessels (Volumet(Volumet2 ric Flasks and Centrifuge Tubes) E 438 Specificati Specification on for Glasses in Laborator Laboratory y Apparatus Apparatus 2 E 542 Practice for Calibration of Volumetric Ware Ware 2 E 675 Specification Specification for Interchangea Interchangeable ble Taper-Ground aper-Ground 2 Stopcocks and Stoppers E 694 Specification for Volumetric Volumetric Ware Ware 2 E 920 Specification for Commercially Packaged Laboratory Laboratory Apparatus2 E 921 Specification for Export Export Packaged Laboratory AppaApparatus2 E 1133 Practice for Performance Performance Testing Testing of Packaged Laboratory Apparatus for United States Government Procurements2 1 This This specific specificatio ation n is under under the jurisdi jurisdictio ction n of ASTM Committ Committee ee E-41 E-41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.01 on Glass Apparatus. Current Current edition edition approved approved Feb. 15, 1994. Published Published April 1994. Originally Originally published published as E 288 – 65T. 65T. Last previous edition E 288 – 83 (1988). 2 Annual Book of ASTM Standards, Standards, Vol 14.04.
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E 288 5. Sampling and Testing Testing
minimum of 90 % of the neck circumference. 4.5.2 Identification Markings —Each flask, marked by one of the methods given in 4.5.1 shall show the manufacturer’s name or trademark, the nominal capacity, the word “contains” or the symbol “TC,” and the temperature of calibration, that is, 20°C. Stoppers shall be marked with the identification of the manufa manufactu cturer rer or seller seller and size; size; molded molded raised raised letter letterss and numbers may be used. 4.5.3 Laboratory Marking Spot —Each —Each flask shall have an area roughened by blasting or enameled to provide a suitable area for laboratory marking.
5.1 For sampling sampling and testing testing refer to Specificati Specification on E 1157. 6. Packaging Packaging 6.1 For packaging packaging select from one of Specification Specification E 920, 920, Specification E 921, or Practice E 1133. 7. Keywords Keywords 7.1 flasks; flasks; glass; glass; volumetri volumetricc
TABLE TABLE 1 Requirements for Volumetric Volumetric Flasks Position of Capacity Line Capacity, mL
5 10 25 50 100 200 250 500 1000 2000
Class A Capacity Tolerance, 6mL
0.02 0.02 0.03 0.05 0.08 0.10 0.12 0.20 0.30 0.50
Class B Capacity Tolerance, 6mL
0.04 0.04 0.06 0.10 0.16 0.20 0.24 0.40 0.60 1.00
Maximum Inside Diameter of Neck at Capacity Line, mm
8.25 8.25 8.25 10.00 12.30 15.00 15.00 18.20 20.00 25.50
Straight-Neck Style— Minimum Distance from
Intermediate Bulb Style—Minimum Distance from
Top of Neck, mm
Body, mm
Mixing Bulb, mm
Body, mm
22 28 35 40 40 45 45 60 60 60
5 7 7 8 10 10 10 15 15 15
... ... ... 10 10 10 10 10 10 10
... ... ... 8 10 10 10 10 10 15
2
Stopper Size
8 or 9 9 9 9 13 13 or 16 16 16 or 19 22 27
E 288 The American Society for Testing Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of 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 and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
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