ASTM E961-97(R2021) pdf free download

ASTM E961-97(R2021) pdf free download.Standard Specification for Blood Sedimentation Tube, Wintrobe, Glass, Reusable
1. Scope
1.1 This specification covers reusable blood sedimentation tubes suitable for determining sedimentation rates and the volume of packed red blood cells. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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.
3. Terminology
3.1 Definitions ofTerms Specific to This Standard: 3.1.1 reusable—capable of being used again. 3.1.2 Wintrobe—the surname of the individual responsible for the design of the Wintrobe tube and the method of use. 3
4. Classification
4.1 This specification covers a tube that is intended to be used until it is no longer considered a functional device for the purpose intended.
5. Materials
5.1 Glass—The tubes made to this specification shall be fabricated from borosilicate glass, Type I, Class B, or soda- lime glass, Type II, in accordance with Specification E438.
6. Dimensions and Graduations
6.1 Dimensions—The tube shall be made of tubing with an outside diameter (O.D.) of 7.0 to 8.0 mm with an inside diameter (I.D.) of 2.9 to 3.3 mm. The uniformity of the bore shall be 60.1 mm throughout the tube. The tube shall be 110 to 117 mm long and have a graduated scale of 105 6 0.25 mm from the inside bottom of the tube. The tube shall be legibly marked with the manufacturer’s or vendor’s name or mark and possess a frosted area for marking purposes. 6.2 Graduation Scale—The tube shall be graduated 105 6 0.25 mm in 1-mm divisions and numbered every 1 cm with two sets of numerals. One set of graduation numerals shall be from 0 to 9 cm down the left side of the graduation scale and the other set of g (20 to 25 °C) for 15 min. Remove tube from the solution and thoroughly rinse in tap water followed by distilled water. Dry the tube by rubbing vigorously, 5 to 10 strokes, with a laboratory cloth or tissue. This appearance of the markings should be the same as before the test, when judged by eye under normal room lighting. 6.3 Resistance to Centrifugal Force Test—Fill the tube with water to the top graduation line and place in a centrifuge. The speed and dimensions of centrifuge headshall be such that the inside bottom of the tube is subjected to arelative centrifugal force of (RCF) not less than 2 500 gravities. Calculate the relative centrifugal force as follows:
6.4 For additional sampling and testing data, see Specifica-tion E1157.
7. Packaging
7.1 For packaging, select from either Specification E920,Specification E921, or Practice E1133.
8. Keywords
8.1 blood; glass; reusable; sedimentation rate; wintrobe.