Testing the tests Discussion: a survey of accuracy and precision of juice chemistry analysis at Virginia service labs

Rick Tagg

Deplane Cellars

Winemakers who send samples to an outside lab occasionally see results that either do not match their in-house values or are out of the normal range seen for a given variety or vineyard, leaving questions about the true values, sources of error, and resulting winemaking decisions. This interested winemaker Rick Tagg, (Delaplane Cellars) which led to his experiment to survey the accuracy and precision of three Virginia- based service labs for a better understanding of how to interpret lab results. In this video, Dr. Joy Ting and Rick Tagg discuss his experiment.

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Stephen Barnard

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Stephen Barnard

Keswick Vineyards

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Testing the tests: a survey of accuracy and precision of juice chemistry analysis at Virginia service labs

Rick Tagg

Delaplane Cellars

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