RT Journal Article SR Electronic T1 Johann Wilhelm Schaffner, Leopoldo Río de la Loza, and Elemental Analysis in Mexico JF History of Pharmacy and Pharmaceuticals JO His of Phar and Pharma FD University of Wisconsin Press SP 154 OP 186 DO 10.3368/hopp.64.2.154 VO 64 IS 2 A1 Mariana Ortiz-Reynoso A1 Gabriel Eduardo Cuevas Gonzalez-Bravo YR 2023 UL http://hopp.uwpress.org/content/64/2/154.abstract AB In 1849 Johann Wilhelm Schaffner, a German naturalist trained in Darmstadt and renowned for his botanical contributions arrived in Mexico. Three years later, the famous Mexican chemist Leopoldo Río de la Loza published the first elemental analysis developed in that country, applying it to pipitzahoic acid (perezone). The technique used was published by Justus von Liebig in 1831. However, the application of elemental analysis was not explored again in Mexico until the middle of the twentieth century, pushing back the areas of chemistry that had developed in Europe. Based on historical and historiographic sources, this article explores whether Río de la Loza’s access to Liebig’s elemental analysis technique was via his connection with Schaffner, it discusses the reasons the use of elemental analysis was abandoned in Mexico, and it highlights the lack of recognition of Schaffner’s work.