2.6. Analytical protocols
2.6.1. Determination of alcohol content and soluble solid content of H. erinaceus wine and vinegar
The alcohol content was determined using the specific gravity method with a hydrometer. The soluble solids content was determined at 20 °C with a refractometer (RA-250WE, Kyoto electronics, Kyoto, Japan). All measurements were conducted in triplicate and reported as °Brix.