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    Varnish Tester

    Uploaded by

    tuan.nguyen.ngoc.2024

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Varnish Tester

    Uploaded by

    tuan.nguyen.ngoc.2024
    4 views5 pages

    Original Title

    Varnish tester

    Copyright

    © © All Rights Reserved

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    PDF, TXT or read online from Scribd

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    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    4 views5 pages

    Varnish Tester

    Uploaded by

    tuan.nguyen.ngoc.2024

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 5

    12 13

    ~
    PI,lCt' 50 rnl of hOlllogenized (suspend the contdfllll1,ltion) silmple dnd 50
    rnL of hexi'lnes Into the 12S ml. plrlc,tlc lr lpIlnlPYPf fld'l~ w/b luE' lid (as
    ,,!lown III PICf'UIP 1). lhe two flurch wil l IPlllC1l1l sepd rdtt'd (picture 12)
    un t rl the f lask IS sWirled to m ix (picture 13 ). rour entire content o f the
    fl,'lsk IfltO t he prT'v loLJsiy prepared filtrdtlon appi'l l iltus (the patc h MUST
    be w_t'\IY~lrJl_e~LbefO!e putting the appal-dtus together) dn d engage the
    VdCUU lll. Rinse the flask uSing the squPpz€' bnttlp fll lf'd With !lp xilnps.
    Once the flask IS comp lete ly rrnsed (Hlci no f lulcl r-PllldlllS In t he filtration
    fUllnl' i, r l llSI:' t he funnel cll1d the patch until no oil Il,,:ddue IPrl1dlns. Keep
    ttl(> VdClJlHll on ;mci SepMJte the bluE' fdtfdtlon fUllrH'1 prf'Cf' (,l'> picture
    g) I\lI1se tlw pelteh flJlther If {H1Y od resldup I'> VISible. Keep the VellUlJlll
    on until the pdteil IS dry (dny wheJQ between 2 _. ~ il1lilutes depending on
    cOllt,HlllJ1tltlon). I\ernove the patch from tlw <:.ueerl USlllg the fmceps
    dJ1d nledsure the lillal weight. Mdkt· sure 110 lontclrllllldtl()11 fldke':> off
    wlwil trtlnsferJlI1g hom the hltrdtlon ,IPPdJdtlJS to tllP hdldllce. C~lculatt~
    the difference between finClI and Illltlal pdtch weight I hl<, IS the value
    ppr SO IllL. Empty the collection vessel prior t o completing subsequent
    retch weig hts.
    Operating Instructions for

    EPT Re-Usable MPC Filtration Kit

    II Assemble Filtration
    Apparat us
    Remove the 47 mm filter holder
    I Rinse Down Inside
    of Funnel
    Direct a jet of solvent against all
    assembly from the vacuum f1ltration the inner surfaces of the funnel.
    flask. If necessary, use the butt-end Use enough solvent to carry all the
    of the forceps to pry against the contaminants through the filter
    flask rim at the cutout slot. Invert holder screen and into the flask.
    the holder assembly and install it on
    the flask, with the funnel up and the
    seating holder base flange resting
    evenly against the flask rim.

    II Install Cel lulose-Nitrate


    0.45 um Fitter Patch
    II Attach Vacuum Pump

    Remove the funnel from the test The free end of the flexible tube of
    filter holder by turning the knurled the vacuum pump (the end with the
    ring from right to left until free, then male luer-Iock) should be inserted
    lifting. With forceps, center a 47 mm - firmly into the small hole on the side
    white cellulose-nitrate filter paper of the filter holder base.
    on the wire mesh support screen .
    Replace the funnel and fe-tighten
    the knurled ring to seal the filter
    in place.

    I Filter Test Sample . . Rinse Contamination


    iii From Sample Flask
    Shake the sample flask containing Rinse the inside of the sample flask
    50 mL of sample and SO ml of
    using solvent and pour the solvent
    pentane (or hexanes or petroleum
    into the funnel as soon as the level
    ether). Empty the contents into the of fluid in the funnel permits.
    funnel, pouring against the funnel Sustain vacuum as required.
    walls to distribute the fluid evenly
    over the surface of the filter. Draw
    vacuum inside the flask using a
    vacuum pump. More contaminated
    fluids will require more vacuum.

    I Rinse Conta mination


    From Funnel Walls
    When the sample level in the funnel
    . . . Remove Filter and
    iii analyte colour using Hab
    Remove the funnel , lift off the
    drops to the narrow neck of the test filter with forceps and place it
    funnel. wash down the inner surfaces face-up in an uncovered Petridish .
    of the funnel with solvent. let the filter dry completely in still
    air. place the I-Lab directly on the
    filter and rei:ord the MPC dE value
    3X and calculate average.
    NOTE : MPC dE readings will vary
    depending on the table surface.
    Recommend taking measurements
    on aluminum foil to improve
    accuracy.

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