Detection method of alcohol

Acidic potassium dichromate plus sulfuric acid is enough. Qualitative analysis is to drop acidic potassium dichromate into the solution to be tested. When it turns green, it means there is alcohol, and when the first drop turns green, it means there is alcohol. Quantification is to titrate the solution to be measured with calibrated acidic potassium dichromate.

Please accept it, thank you!