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ape ba uaod ee esuure a titht seal), secure in rotary extractor device, <br />and souu ae 70 t 2 rpm !or 1. 3 2 hours. Asbienc tasparacure (y,,,, <br />taagtoratuta o! seas in which extraction is to eat;e plate) shall ba <br />aiainuiaed at 22 t 3•C during cha extraction period. <br />ljp,4: As asiueioa eontinwa, pressure say build up viehin <br />the •:tractor bottle for rose types o! saspla (a-s-, <br />lined or ealeius earbonata•eontainia~ sasple say e~olva <br />~asea such as carbon dioxide). To relieve excess <br />pressure, the extractor bottle say be periodically <br />opened (~~, altar 13 sinuses, 70 sinuces, and 1 hour) <br />and vented into a hood. <br />7.6.5 Follovin~ the ld ~ 2 hour extraetian, the material in the <br />extractor vessel La separated into its eosponene liquid and so11d phasaa by <br />tilterlns ehrou~h a ~laaa fiber Lilear. <br />7.6.6 It the vaate contained no initial Liquid phase, the <br />filtered liquid material obtained troy atop 7.6.3 1s defined as the <br />extraee. If the mate contained an initial liquid phase, the filessed <br />liquid material obtained Eros Step 7.6.5 and the initial liquid phut (ltep <br />7.6.3.3) are collective ly defined as the extraee. <br />ZIQ~: the initial liquid phase and the filtered ligwid material <br />can be cosbiaed and analyzed it they are siseible. the <br />phasaa soar be analyzed sepasataly (sea Seep 7.b.a) it <br />stay era not siacible. If the filtered liquid oaeerial la <br />sultiphuie, do toe eonbiae the phases for snaiysis, but <br />analyze than separately and saehesatically eosbine the <br />results. <br />7.6.7 Follovin~ eolleeeion o! the 1312 extract it !a racoeawnded <br />that the pN of eha extraee be recorded. the extras should be isiadlaeely <br />aliquoead for analysis sad properly preserved (seals aliquots ruse be <br />acidified vieh nitwit acid to pd < 2; all ocher aligwes swt be scored <br />under retrijeration (6•C) uoeil analyzed). The 1312 extract shall be <br />prepared sad analyzed aeeordiai eo appropriate analytical sechoda. 1312 <br />extracts ce be analysed for seals, other chaa sercury, shall be acid <br />dipated. <br />7.i.t I! t6s Individual phasaa are co be analyzed sepasataly, <br />datarad,aa tLs ~elu~a of the individual phases (eo t O.S percent), conduce <br />the appsopsYaC~ analyses, and cosbine the resoles saehesueieally by using a <br />sisple wl~as-vaifl-tad awrap: <br />Fiaal Malyea Coneentraelon <br />(Vl) (Cl) + (V2) (C2) <br />V1 + V2 <br />vhare: <br />Vl ~ The wlusa of the first phase (1) <br />C1 ~ The concentration o! the eoncasinane of concern in cha <br />ilrse phase (s6/1) <br />V2 ~ The wluse.of the second phase (1) <br />C2 ~ The concentration of the eoncasinane of concern In cha <br />second phase (ss/1) <br />10 <br />