What can yield a false positive ethanol level done by an enzymatic assay?
A recent letter to the editor by Golby et al. reports that both elevated lactate and LDH can produce spurious ethanol results. (Golby R et al. False positive ethanol levels in modern laboratory assays. Clinical Toxicology 2019 https://doi.org/10.1080/15563650.2019.1687908)