This Extraction Apparatus is designed for arsenic determination by the silver diethyldihiocarbramate photometric method. Meets A.P.H.A. Standard 104A, ACS/USP and EPA specifications. Fabricated from Pyrex borosilicate glass. Joint on 125mL flask is 24/40 and ball and socket joint between absorber and scrubber is 12/2. Complete unit includes clamp.