Radiochemical analysis of Tc-99m human serum albumin with high-pressure liquid chromatography: concise communication

Journal Article · Thu Apr 01 04:00:00 EST 1982 · J. Nucl. Med.; (United States)

OSTI ID:5588656

Vallabhajosula, S; Goldsmith, S J; Pollina, R; Lipszyc, H

High-pressure liquid chromatography (HPLC) can be performed with an aqueous size-exclusion column to separate proteins or other macromolecules on the basis of molecular size. An HPLC system with a Spherogel-TSK SW column was modified to detect simultaneously uv absorption and radioactivity. Characteristic retention times (RT) were determined for pure human serum albumin (HSA) (RT = 17 min) and pertechnetate (RT = 28.5 min). When analysis was performed on Tc-99m HSA preparations, Tc-99m radioactivity was resolved into five different peaks, with RT ranging from 10.2 to 28.5 min. Less than 2% radioactivity was associated with the pertechnetate peak, whereas the remaining Tc-99m was protein bound. Most of the activity (90%) corresponded to the albumin peak, and 7% was bound to contaminants of high molecular weight with RTs of 10.2 and 14 min. Rapid separation of various radiochemical components differing in molecular size provides an improved basis for understanding the biodistribution of a Tc-99m HSA preparation. This technique would be useful for the preparation and analysis of various radiolabeled macromolecules such as enzymes, immunoglobulins, and other proteins.

• Research Organization: Mount Sinai Medical Center, New York, NY
• OSTI ID: 5588656
• Journal Information: J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 23:4; ISSN JNMEA
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ALBUMINS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BLOOD SERUM
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DRUGS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LABELLED COMPOUNDS
LIQUID COLUMN CHROMATOGRAPHY
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PROTEINS
QUANTITATIVE CHEMICAL ANALYSIS
RADIOCHEMICAL ANALYSIS
RADIOISOTOPES
RADIOPHARMACEUTICALS
SEPARATION PROCESSES
TECHNETIUM 99
TECHNETIUM COMPOUNDS
TECHNETIUM ISOTOPES
TRANSITION ELEMENT COMPOUNDS
YEARS LIVING RADIOISOTOPES