Dr. Fetzer has been a method-development analytical chemist for over 3 decades. In that role he developed new methods for GC, HPLC, fluorescence spectroscopy, titrimetry, the use of ion-selective electrodes, and physical properties of aqueous solubility and octanol-water partition coefficient that complied with Good Laboratory practices. As part of his consulting and contracting work he developed GLP-compliant methods for a biopharma startup and for a petrochemical company. In all of these various efforts, numerous SOPs were written, as well as the prototype of a later-approved ASTM method. He supervised and managed a GLP compliant laboratory for over 10 years and helped maintain the documentation necessary for compliance.