Effectiveness of kaolin silver complex for control of acetic bacteria and brettanomyces

Kaolin-Silver complex (KAgC) is a fine grey powder where silver metallic form is strongly linked on an inert carrier as kaolin. The complex is 99% kaolin and 1 ± 0.1% silver metallic form. The main objective of this new oenological practice is making wines with low concentration of sulfites or without sulfites.

Read full article here: OIV – 2014

Colloidal silver complex as an alternative to sulphur dioxide in winemaking

The use of sulphur dioxide in the food industry has come increasingly into question because it can lead to pseudo-allergies. The aim of this work was to study the effectiveness of a colloidal silver complex (CSC) as an antiseptic instead of SO2 in both white and red winemaking. We show that the CSC at doses of 1 g/kg of grape is an effective antiseptic, able to control acetic acid and lactic acid bacteria development, allowing the growth of Saccharomyces cerevisiae at rates similar to those observed with SO2, up to sugars were exhausted. Silver concentration in finished white and red wines, 18.4 mg/L and 6.5 mg/L, respectively, was well below the legal limits. Wine composition was slightly affected, but CSC wines had a lower alcoholic degree and acetaldehyde content than SO2 wines. CSC is a promising antiseptic for wine industry, although a major drawback, its lack of antioxidant activity, should be considered.

Read full article here: IVICAM – 2011

Evaluación de la plata coloidal introducida en bolsas permeables en la elaboración de vinos tintos de tempranillo como alternativa a la utilización del dióxido de azufre

o El SO2 es el principal aditivo utilizado en la elaboración de vino por sus propiedades antioxidantes y antisépticas.

o Este compuesto puede afectar a la salud humana y por ello la legislación es cada vez más restrictiva.

o Se buscan otras sustancias o tecnologías alternativas para reemplazarlo o disminuir su uso.

o La plata es conocida desde antiguo por sus propiedades antimicrobianas. La plata coloidal (CAgC, Laboratorios Argenol) está

compuesta por caolín (99%) sobre el que se deposita la plata metálica (1%).

o El objetivo del trabajo fue estudiar la eficacia de este producto como antiséptico en sustitución del SO2.

Puedes ver el artículo completo aquí: CIDA. Congreso Turquia junio 2012

Characterization of macromolecular complexes in red wine: Composition, molecular mass distribution and particle size – Original Research Article

Characterization of macromolecular complexes in red wine: Composition, molecular mass distribution and particle size   Original Research Article

Food Chemistry, Volume 199, 15 May 2016, Pages 838-846

Keren A. Bindon, Anna L. Carew, Agnieszka Mierczynska-Vasilev, Stella Kassara, Fiona Kerslake, Paul A. Smith

More information here