Issue link: http://winesandvines.uberflip.com/i/629061
February 2016 WINES&VINES 51 PRACTICAL WINERY & VINEYARD BARRELS Contacts: Martin McCarthy North American Sales Director Cell. (707) 303-0941 Deborah Passin Sonoma, Central Coast Cell. (415) 215-5302 Offce: 1285 S. Foothill Blvd - Cloverdale, CA 95425 Ph: (707) 224-2377 - Fax: (707) 224-2390 100% Integrated fr , Full T 100% PEFC, HAACP, ISO 9001, Veritas Certifcation for Wood Aging and Origin gests that ellagitannin content may reflect other variations in wood composition such as lac- tones and hemicelluloses. Regarding vanillin, no signifi- cant differences were found in Chardonnay between LTP and HTP, whereas the MTP modality exhibited a higher level in Merlot. This corroborates some previous observations made in other trials with that same TP. Beyond its impact on wine struc- ture and aromas, wood sorting ac- cording to tannin potential seemed to have a significant influence on preservation of grape-based tan- nins. (See "Tannin Composition and Concentration in Cabernet Sauvignon-Estate B" below.) After 12 months of élevage, the condensed tannin concentration increased in Cabernet Sauvignon- Estate B according to tannin poten- tial from 184.4 mg/L (LTP) to 215.3 mg/L (HTP). The mean de- gree of polymerization (mDP) was similar between LTP and HTP. How- ever, the extension subunit percent- age such as (-)-epigallocatechin TANNIN COMPOSITION AND CONCENTRATION IN CABERNET SAUVIGNON-ESTATE B Mole % 70 60 50 40 30 20 10 0 mDP ECG EGC C EC C-term EC-term ECG- term n Low tannin potential n High tannin potential µg/L 300 250 200 150 100 50 0 WOOD AROMATIC COMPOUNDS IN MERLOT Furanic aldehydes (/10) cis-WLactone Vanillin Guaiacol Eugenol n Low tannin potential (G150) n Medium tannin potential (G150) n High tannin potential (G150) mDP = mean degree of polymerization; ECG: epicatechin gallate; EGC: epigallocatechin; C: catechin; EC: epicatechin.