Feature of the Month
Product of the Month
Winy: Potassium Metabisulfite from Enartis
Potassium metabisulfite is a widely used additive in winemaking with various functions including working as an antioxidant and an antibacterial agent. Winy is pure, high-quality potassium metabisulfite powder made by Enartis for bulk additions to must and wine. Because it possesses elevated purity and is packaged in tri-laminate packaging, it guarantees a long shelf life. Winy has the following applications in must and wine:
• Acts as an antioxidant by preventing browning, loss of aroma, bitterness and herbaceous characteristics
• Blocks the action of oxidizing enzymes
• Functions as an antimicrobial by preventing and slowing down the development of undesired microflora
• Breaks down grape cell walls accelerating the extractive processes of pigments and other phenolics
1 kg, $4.10, Item # 35-820-0001
25 kg, $68.00, Item # 35-820-0025
For more information on Winy, please call a Vinquiry Product Specialist at (707) 838-6312.
Analysis of the Month
Cold Stability by Conductivity
It is crucial that once a wine reaches the market, it is an accurate representation of what went into the bottle. One of the many tests that should be performed before bottling is Cold Stability by Conductivity. By using this stability test for tartrates, you can help ensure that your wine will not form microcrystals once it is in the hands of the consumer. These crystals are not harmful, however consumer do not want to see them in their wine.
For Vinquiry’s Cold Stability by Conductivity Test, a sample is chilled to the lowest temperature to which the wine is expected to be exposed and a conductivity reading is determined by meter. Finely ground potassium bitartrate (KHT) is then added to induce crystallization of the unstable potassium bitartrate in the wine. After twenty minutes, a second conductivity reading is recorded. If the change in the conductivity is very small, the wine is considered cold stable at that temperature. For the most reliable results, the sample should represent the finished product, i.e., blended, fined, filtered. If the wine is being cold stabilized, the sample should be filtered at that tank temperature prior to analysis. That way, any microcrystals of KHT that might re-dissolve as the wine warms will not interfere. The conductivity test can determine if a wine is stable (will not precipitate KHT) at specific temperatures.
Cold Stability by Conductivity: $33.00
Receive a 10% discount on Cold Stability by Conductivity in the month of June 2009 by mentioning the code: VQCOLD0609.
For more information, please contact our Laboratory Customer Service at (707) 838-6312.
Past Features of the Month
November 2008 - Post Fermentation Analysis
July 2008 - Harvest Analysis
June 2008 - CUNO Filters
May 2008 - Bottling Analysis
March 2008 - Ascent Cork Aroma Evaluation
February 2008 - Wine Improvement Panel
January 2008 - PCR for Spoilage Yeast and Bacteria
August 2007 - Juice Panels
June 2007 - Instrument Calibration
May 2007 - Adams Tannin Assay
April 2007- Laboratory Set-Up
March 2007- PCR Analysis
February 2007- ISO Accreditation