[Code of Federal Regulations] [Title 21, Volume 7] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR640.23] [Page 89-90] TITLE 21--FOOD AND DRUGS DEPARTMENT OF HEALTH AND HUMAN SERVICES--(Continued) PART 640--ADDITIONAL STANDARDS FOR HUMAN BLOOD AND BLOOD PRODUCTS--Table of Contents Subpart C--Platelets Sec. 640.23 Testing the blood. (a) Blood from which plasma is separated for the preparation of Platelets shall be tested as prescribed in Secs. 610.40 and 610.45 of this chapter and Sec. 640.5 (a), (b), and (c). (b) The tests shall be performed on a sample of blood collected at the time of collecting the source blood, and such sample container shall be labeled with [[Page 90]] the donor's number before the container is filled. [40 FR 4304, Jan. 29, 1975, as amended at 50 FR 4139, Jan. 29, 1985; 53 FR 117, Jan. 5, 1988; 64 FR 45372, Aug. 19, 1999; 66 FR 1836, Jan. 10, 2001]