Can someone identify this TVB-N method?

From: Ko, Iwan Setiyono (isk025@student.uit.no)
Date: Fri Feb 24 2006 - 10:21:54 PST

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    Dear all,
    Can someone comments on this TVB-N method? Is this kinda modification of
    Conway's microdiffusion method? Or just using the Conway plate?

    ".... weigh 25 g sample, add 75 ml TCA 75%, and homogenize for 1 minute...
    take 1ml of the filtrate and put it into the left-outer chamber (plate?).
    Meanwhile, take 1 ml 2% H3BO3 and add it to the inner chamber, and 1 ml
    saturated (1:1) K2CO3 to the right-outer chamber... incubate at room
    temperature overnight or at 35 deg C for 2 hours....titrate with 0.02 N
    HCl until the boric acid turns from colorless (?) to pink...."

    Regards,

    Ko, Iwan Setiyono (Ko, I.S. - ISK)
    MSc Candidate - Int. Fisheries Management

    E-mail : isk025@student.uit.no
    Phone : +47 77 64 60 00
    Fax : +47 77 64 60 20
    Mobile : +47 45 00 40 97

    Visiting address:
    Room A-374
    Norwegian College of Fishery Science (NFH)
    University of Tromsų - Breivika N-9037 Tromsų
    NORWAY



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