Showing posts with label SO2 Additions. Show all posts
Showing posts with label SO2 Additions. Show all posts

Wednesday, November 21, 2007

SO2 Quick Test: You Get What You Pay For


We are supposed to bottle tomorrow, Thanksgiving, but we were running blind without an accurate SO2 test. On Monday, I ordered a quick and dirty kit from Vintner's Vault, which arrived yesterday. This morning, I opened the kit, and read the directions. The kit is from Accuvin (http://www.accuvine.com/) I took samples of wine from the 2006 Merlot Reserve and the 2006 Nebbiolo. This was the first time for me to use such a test -- it's about time, after 4-years of winemaking, and I found it easy to do. Just follow the directions, taking a minute sample of wine, adding it to a vile, then reading a color chart. It seemed that the Merlot came in with a reading of about 16 PPM, about half where I need to be before bottling. Then, I tested the Nebbiolo. As I suspected the Nebbiolo was high, I used the "high range" or "red cap" of the Accuvin test, and the reading suggested 40 PPM (perfect). Just to be sure, I repeated the test, this time using the "Green Cap" for the lower range. The result: 16 PPM (same as the Merlot). The color of the green-cap test vile containing the Nebbiolo was the same color as the green-cap test vile containing the Merlot. So, what is the reading: 40 PPM or 16 PPM? Answer one: neither. Answer two: I don't know. What I do know is not having enough free sulphur when bottling is a recipe for a short shelve life, so, to be on the safe side, I added a 1/2 teaspoon of metabisulfite to the 15-gallons of Merlot Reserve, and 2-teaspoons of metabisulfite (mixed with water) to the barrel of Nebbiolo. Because our biological clocks are geared to bottling on Thanksgiving, momentum drives us to bottling something tomorrow. It will be the Merlot. The Nebbiolo can wait until the weekend. And about the tests, you get what you pay for. When I asked Steve at Vintner's Vault about it, he said he's got a $600 machine that will provide accurate tests. This we need to look into next year.

Friday, November 16, 2007

Sulpher Dioxide Additions & Measurements: How Best To Measure?

We're less than a week away from bottling and all was looking good. Mike's SO2 measurements -- which cost $5 a pop for the cartridge -- indicated that there was plenty of SO2 in the wine to ensure long preservation, which is what I want for this prized Nebbiolo. Karen sent a sample of her Nebbiolo wine off to the lab, to compare measurements. Whereas Mike's test indicated SO2 levels approaching the legal limit and the threshold of taste (i.e., way too high), the lab indicated that she didn't have enough SO2. Uh, oh. (One piece of good news ... the alcohol level is at 15.6% -- we're talking about a big, chewy, red wine here folks.) So, here are the issues:

* How best for the small winemaker to test S02 levels without using the lab?

* Without a good method to use down at the farm, which lab in Southern California to use?

Looking forward to your answers soon, as we're itching to bottle!