Separation of Polynuclear Aza-Heterocyclics by High-Pressure Liquid Chromatography Using a Silver-Impregnated Adsorbent

Characterization of aza heterocyclic hydrocarbons in urban atmospheric particulate matter

“…The chromatographic behavior of AHHs on a reversed-phase column is similar to that of the PAHs and is governed by the number of aromatic rings (19,22). Moreover, the behavior seems to depend on the steric availability of the aza nitrogen electron pairs, as suggested by other investigations (10,23). Under these chromatographic conditions (column, column temperature, and mobile phase), three groups of the AHHs are not resolved: (1) Phe, B(f)Q, and B(h)Q; (2) lections of excitation and emission wavelengths) (Figure 3): (1) 7-MB(c)Ac and 10-AB(a)P; (2) DB(ah)Ac and DB(ac)Ac.…”

Characterization of aza-arenes in basic organic portion of suspended particulate matter

“…Gas chromatography (GC) has also been successfully applied with a flame ionization detector (15) or with mass spectrometry as a specific ion detector (4). Various modes of high-pressure liquid chromatography, including reversed phase (16), adsorption (16), complexation (17), and liquid-liquid partitioning (78) have also been used for the separation of azaarene standard compounds.…”

Determination of 5-trans-prostaglandin E2 in prostaglandin E2 via high performance liquid chromatography of their p-nitrophenacyl esters on a silver ion-loaded cation exchange resin

“…The acetonitrile probably competes with the prostaglandins for Ag(I) binding sites. The role of this particular solvent has been noted in liquid chromatography on other silver-loaded columns (10). The retention volume of the p-nitrophenacyl ester of PGE2 was extremely sensitive to the acetonitrile content; a 1% increase in the acetonitrile content of the mobile phase yielded a 50% reduction in retention volumes.…”