Enroll at any time.

Participants will report on any or all of the following properties: alcohol by volume, total sulfur dioxide/free sulfur dioxide, titratable acidity/volatile acidity, specific gravity, pH, residual sugar (based on Cu reduction methods), malic acid, glucose and fructose (based on enzymatic methods), A420/A520, copper (Cu) content, and potassium (K) content.

Sample Description: Two 750 mL bottles of similar wine.

Samples ship in February, June, and October for a total of three shipments, with shipments beginning with the earliest available cycle of testing.

Additional Information: Three research properties are also included and rotate during each cycle of testing. Past properties have included iron (Fe) content, potassium sorbate content, and calcium (Ca) content.

Please contact CTS for pricing if your country or zone is not included in the shipment dropdown.

The American Society of Enology and Viticulture's (ASEV) laboratory proficiency ad hoc committee provides CTS with insights into winery laboratory operations. This test is included on CTS' Scope of Accreditation to ISO/IEC 17043.