Section 640.33 - Testing the blood(a) Blood from which plasma is separated shall be tested as prescribed in § 610.40 of this chapter and § 640.5 (b) and (c) .(b) Manufacturers of Plasma collected by plasmapheresis shall have testing and recordkeeping responsibilities equivalent to those prescribed in §§ 640.71 and 640.72 .42 FR 59878, Nov. 22, 1977, as amended at 44 FR 17658, Mar. 23, 1979; 50 FR 4139, Jan. 29, 1985; 53 FR 117, Jan. 5, 1988; 66 FR 31165 , June 11, 2001; 80 FR 29905 , May 22, 2015