• October 18, 2015 at 6:27 am #603
      Dave Burt
      Keymaster

      These grapes were picked on October 14, 2015 and received at the Cavallotti Lodge on October 17.

      YAN from a sample sent to the lab on the pick date indicated 81.1 mg N/L

      Post your chemistry results and any planned adjustments for the Cabernet Sauvignon by replying to this topic.

    • October 18, 2015 at 7:14 pm #608
      WebMaster
      Keymaster

      Chemistry Measurements: pH=3.86, TA avg = 6.0g/L, SpG = 26B
      Notes: The pH is a little high and the TA a little low – will add 1g/L Tartaric Acid.
      Will adjust Brix to 24 for 600lbs (150L) – add 88g Tartaric Acid and 12.5L water.*
      *ref. Winery Technology & Operations, Dr. Yair Margalit, Wine Appreciation Guild, San Francisco, 1996

    • October 19, 2015 at 2:04 am #611
      Franco Sartor
      Participant

      Thanks for the input Mickey!
      I came in with ph 4.1 T/A 6.0 and Sg of 26.5

      I am considering 1 gram p/l tartaric, and 4 l of water added two liters with yeast and tartaric additions and two liters with addition of Yeast nutrient three days down the road…
      Cheers

    • October 22, 2015 at 6:41 pm #620
      Don Graham
      Participant

      My #s Brix 24.6 pH 4.12 TA4.0
      Befor cold soak

    • October 22, 2015 at 8:05 pm #622
      Dave Burt
      Keymaster

      Chemistry on clear juice after a 4 day cold soak: Brix 24.6 (SG 1.104), pH 4.09, TA 4.6
      Was expecting a higher Brix given the field estimates of Brix 26.
      Added 1 g/L of tartaric acid in a small amount of water. No water dilution planned.

      Assuming and ending SG of 0.994, potential alcohol = (1.104-0.994) x 131 = 14.4%

      Using D254 yeast rehydrated in Go Ferm and 80 ml water

    • December 30, 2015 at 7:15 pm #647
      Don Holmes
      Participant

      2015 Cab. Sauvignon: Added about 2 gm/L Tartaric Acid to bring high Ph [4.1] down.
      After good fermentation, successful malolactic and cold stabilization the wine is now:
      TA 6.5 and Ph 4.02.
      Don`t like the high Ph.
      What to do now?? Does any body have an answer?

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