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 TRIBUTYL PHOSPHATE: METHOD 5034, Issue 1, dated 15 August 1994 - Page 3 of 4 6. 7.

Pipet 10.0 mL of diethyl ether into each jar. Seal the jar immediately to minimize evaporation. Allow samples to stand for at least 30 min with occasional agitation.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94