TY - JOUR
T1 - High-performance liquid chromatographic on-line flow-through radioactivity detector system for analyzing amino acids and metabolites labeled with nitrogen-13
AU - Nieves, Edward
AU - Rosenspire, Karen C.
AU - Filc-DeRicco, Sabina
AU - Gelbard, Alan S.
AU - Cooper, Arthur J.L.
N1 - Funding Information:
This work was supported in part by National Institute of Health Grants CA 34603, CA 33732 and AM-16739, and Department of Energy Contract EE-77-S-02-4268. The authors thank Dr. J.S. Laughlin for his interest and support and the Memorial Sloan-Kettering Cancer Center Cyclotron Core Facility for the production of nitrogen-13.
PY - 1986
Y1 - 1986
N2 - A flow-through radioactivity detector was used for the high-performance liquid chromatographic determination of amino acids and other nitrogenous substances labeled with 13N, a short-lived (t 1 2 9.96 min) positron-emitting radionuclide. 13N-Labeled compounds were analyzed using cation, anion and amino columns, or as the o-phthaldialdehyde derivative on an ODS column. Use of column-switching valves and a high-performance liquid chromatographic system with a quaternary eluting capability permits two to three 20-min analyses of labeled samples from a single 13N experiment to be carried out on different columns using a binary or a single mobile phase. Radioactivity in liver metabolites was quantified using an on-line flow-through monitor with data processing capability for integrating peaks and correcting for radioactivity decay. As an example, 1 min following an l-[13N]glutamate injection via the hepatic portal vein, 77% of the label in the liver was in a metabolized form; at least ten labeled products were formed.
AB - A flow-through radioactivity detector was used for the high-performance liquid chromatographic determination of amino acids and other nitrogenous substances labeled with 13N, a short-lived (t 1 2 9.96 min) positron-emitting radionuclide. 13N-Labeled compounds were analyzed using cation, anion and amino columns, or as the o-phthaldialdehyde derivative on an ODS column. Use of column-switching valves and a high-performance liquid chromatographic system with a quaternary eluting capability permits two to three 20-min analyses of labeled samples from a single 13N experiment to be carried out on different columns using a binary or a single mobile phase. Radioactivity in liver metabolites was quantified using an on-line flow-through monitor with data processing capability for integrating peaks and correcting for radioactivity decay. As an example, 1 min following an l-[13N]glutamate injection via the hepatic portal vein, 77% of the label in the liver was in a metabolized form; at least ten labeled products were formed.
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U2 - 10.1016/S0378-4347(00)83478-7
DO - 10.1016/S0378-4347(00)83478-7
M3 - Article
C2 - 3558563
AN - SCOPUS:0022860421
SN - 0378-4347
VL - 383
SP - 325
EP - 337
JO - Journal of Chromatography B: Biomedical Sciences and Applications
JF - Journal of Chromatography B: Biomedical Sciences and Applications
IS - C
ER -