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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
pharmacology, toxicology and pharmaceutics
Determination of picogram nitroglycerin plasma concentrations using capillary gas chromatography with on‐column injection
Journal of Pharmaceutical Sciences, Volume 73, No. 7, Year 1984
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Description
A specific, sensitive, and precise capillary gas chromatographic (GC) assay capable of analyzing picogram concentrations of nitroglycerin in human plasma was developed. The analytical procedure involves a double extraction of 1 mL of plasma with pentane, after the addition of internal standard (1 ng of 2,6‐dinitrotoluene), followed by evaporation and reconstitution in 50 μL of heptane. The extract (1 μL) was injected onto a capillary column using the on‐column injection technique. The GC oven temperature was programmed from 120°C to 180°C at a rate of 5°C/min. The oven temperature was then programmed to 250°C and was maintained for 10 min. The nitroglycerin and internal standard retention times were 8.6 and 11.4 min, respectively. The position of the end of the capillary column inside the detector is a critical determinant of sensitivity: the column exit must be positioned such that nitroglycerin adsorption to the detector is minimized (i.e., sensitivity maximized). The assay limit of quantitation was 25 pg/mL (CV = 7.6%) using 1 mL of plasma. This GC assay, specific for nitroglycerin in the presence of its metabolites, isosorbide dinitrate, and several other drugs, may be used to quantitate plasma levels obtained after therapeutic nitroglycerin doses. Copyright © 1984 Wiley‐Liss, Inc., A Wiley Company
Authors & Co-Authors
Noonan, Patrick K.
United States, San Francisco
University of California, San Francisco
Kanfer, Isadore
United States, San Francisco
University of California, San Francisco
South Africa, Grahamstown
Rhodes University
Riegelman, Sidney
United States, San Francisco
University of California, San Francisco
Benet, Leslie Z.
United States, San Francisco
University of California, San Francisco
Statistics
Citations: 23
Authors: 4
Affiliations: 2
Identifiers
Doi:
10.1002/jps.2600730715
ISSN:
00223549
e-ISSN:
15206017