Operating parameters and separation of nucleotides on pellicular ion exchangers investigated by liquid chromatographic system

Fast liquid chromatography - An investigation of operating parameters and the separation of nucleotides on pellicular ion exchangers.

In 1964, William Horowitz published the history of the Association of Official Agricultural Chemists (AOAC), of which he was the chief executive officer (Horwitz 1964). At that time the AOAC had existed for 80 years and had ventured very little beyond its stated purpose of validating and publishing standardized methods of analysis for substances important to agriculture and the public health through a highly structured system of interlaboratory testing and review. In the ensuing quarter of a century, however, the AOAC not only changed its name to Association of Official Analytical Chemists but also underwent a striking expansion and transformation. The highlights of that transformation are the subject of this account.

Association of official analytical chemists: 1964-1988

Elektronenaffinitäten organischer Moleküle

A non-radioactive atmospheric pressure device for ionization of analytes comprises an atmospheric pressure chamber having an inlet for carrier gas, a first electrode (31) at one end, and a counter-electrode (32) at the other end of the chamber for creating an electrical discharge in the carrier gas thus creating metastable neutral excited-state species. Optionally, a grid (14) is provided to generate electrons or ions by contact with the excited-state species. The carrier gas containing the excited-state species or the electrons generated therefrom is directed at an analyte at atmospheric pressure near ground potential to form analyte ions.

S. R. Lipsky

Papers

Electron Affinity Spectroscopy—A New Method for the Identification of Functional Groups in Chemical Compounds Separated by Gas Chromatography1