: Many universities (such as UNAM or USP ) provide free access to chemistry manuals and introductory analytical chemistry books through their digital libraries.
If you are a student, check your university's Virtual Library . Most institutions provide free digital access to the latest editions of these books via platforms like Pearson or McGraw-Hill .
: Many authors and professors upload their course materials and textbook chapters here for public access.
: A widely used platform by researchers and students. You can often find full versions of classic texts like Química Analítica by Skoog, West, Holler, and Crouch .
: Análisis Químico Cuantitativo — Known for its clear explanations and practical examples.