Plastic i.v. container for nitroglycerin.
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Drug Packaging↗
Biomedical subjects
D M Baaske
Publications and source records attributed to D M Baaske.
Bretylium tosylate intravenous admixture compatibility. I: Stability in common large-volume parenteral solutions.
The stability of bretylium tosylate in 11 common large-volume parenteral solutions was studied. Two containers of each solution, one glass and one plastic (except for mannitol and sodium bicarbonate solutions, which were available in glass only), were stored at each of the following conditions: intense light (1400-2000 foot candles), ambient room temperature with normal light, 40 degrees C, and 4 degrees C. All samples were tested at 0 and 24 hours; some samples were also tested at 48 hours and 7 days. Testing included measurement for optical density at 4000 and 600 nm, pH level, and bretylium content as determined by HPLC. The admixtures remained clear and colorless, except that mannitol precipitated out of mannitol solutions stored at 4 degrees C. No appreciable changes in pH were observed. HPLC assays showed no significant changes in bretylium tosylate concentrations. Bretylium tosylate is compatible with each of the 11 common intravenous solutions chosen for investigation under the storage conditions studied. Admixtures with mannitol should not be refrigerated, because mannitol crystallizes from solution at refrigerator temperatures.
Bretylium Compounds↗
Stability of procainamide hydrochloride in dextrose solutions.
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Drug Stability↗
Rapid and accurate stability-indicating assay for nitroglycerin.
A rapid high-pressure liquid chromatographic method for determining the nitroglycerin concentration in liquid dosage forms and intravenous admixture solutions is presented. A coefficient of variation of less than 1.8% was achieved over the concentration range most commonly encountered (50-500 microgram/ml). A variable wavelength detector (lambda = 218 nm) and a micro-alkyl phenyl column were employed. The mobile phase was acetonitrile-tetrahydrofuran-water (26:10:64). Total analysis time was 12 min.
Chromatography, High Pressure Liquid↗
Comparison of GLC and high-pressure liquid chromatographic methods for analysis of urinary pseudoephedrine.
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Chromatography, Gas↗
Gas chromatographic determination of apomorphine in plasma.
A method is described for the analysis of 1 to 10 microgram/ml concentrations of apomorphine in plasma. The procedure is based on ethyl acetate extraction, a back extraction cleanup-step, derivatization with heptafluorobutyric anhydride, and gas chromatography on a 3% OV-17 column using flame ionization detection. N-n-Propylnorapomorphine is employed as an internal standard and quantitative relative recoveries of drug are realized with relative standard deviations of 4.6%. The method permits analysis of apomorphine in the presence of its two monomethyl ether metabolites, apocodeine and isoapocodeine. The latter compounds are also chromatographically resolved as their heptofluorobutyrate derivatives.
Apomorphine↗
Cytotoxicity and cell cycle specificity of homoharringtonine.
The plant alkaloid, homoharringtonine, isolated from Cephalotaxus harringtonia is cytotoxic to HeLa, KB, and L cells growing in monolayer cell cultures. This effect appears to be cell-cycle specific. In synchronized KB cells, protein synthesis was preferentially inhibited in the G(1) and G(2) phases (70 and 45% inhibition, respectively) as might be expected for a protein-synthesis inhibitor.
Alkaloids↗