CFDV.org is the website for the The Chromatography Forum of Delaware Valley. Chromatography is a discipline of chemistry which is used to separate mixtures for analysis. For example, when your aspirin is tested to be 99.7% pure that was determined with chromatography by an analytical chemist. Likewise when your urine is tested to contain marijuana that was also determined by chromatography. Chromatography is a complex science and is used extensively in the pharmaceutical industry- an industry which has a large presence in the Delaware Valley.