Exact PDF-sheet citations and verified paraphrase excerpts are connected from Vogelpohl (2021).
At finite stage count or column height, distillation products contain residual components; perfectly pure separation lies at limiting conditions rather than normal finite operation.
Verified against the full extracted text and rendered-page review; scope remains general distillation theory.
For whiskey, residual non-ethanol compounds may be deliberately retained and should not be labeled defects.
Supported by Vogelpohl’s unified distillation framework and explicit discussion of model limits, limiting flows, product feasibility, and practical design tradeoffs.
Created during full-source processing of Vogelpohl (2021); ready for exact locator linkage, but whiskey-specific application remains qualified.