doi: 10.1080/00032717708059219pmid: N/A
Abstract This is a scanned image of the original Editorial Board page(s) for this issue.
Bekersky, Ihor; Boxenbaum, Harold G.; Whitson, Marian H.; Puglisi, Carl V.; Pocelinko, Robert; Kaplan, Stanley A.
doi: 10.1080/00032717708059220pmid: N/A
Abstract A sensitive, rapid, and specific high pressure liquid chromatographic (HPLC) assay was developed for the determination of salicylic (SA) and salicyluric (SU) acids in plasma and urine. The compounds are extracted into ethyl ether at acid pH, evaporated, and reconstituted prior to instrumental separation. Overall recovery of both compounds is 90 ± 5%, and the sensitivity limits are 150 ng of SU and 300 ng SA per ml of biological fluid. The assay was used for the determination of both compounds in plasma and urine of man following oral doses of 40 mg/kg of sodium salicylate.
doi: 10.1080/00032717708059221pmid: N/A
Abstract An electron capture gas chromatographic method utilizing a short glass column of 3% OV-210 at 155°C, has been developed for the direct quantitative determination of 3-oxocarbofuran (3, 3-dihydro-2,2-dimethyl-3-oxo-7-benzofurariyl N-methylcarbamate). The method is rapid, convenient, and does not require the formation of a derivative. Sensitivity permits the detection of quantities as low as 1 ppb in water samples. There was little response to 3-hydroxycarbofuran, 10 ng producing only a small peak. There was no response to carbofuran.
doi: 10.1080/00032717708059222pmid: N/A
Abstract The preparation of a low cost reverse phase preparative liquid chromatography system is described. The described system is capable of providing gram quantity scale-up from analytical reverse phase hplc systems. Load capacity is in the two gram range.
Shieh, Jeng-Jong; Leung, Katherine; Desiderio, Dominic M.
doi: 10.1080/00032717708059223pmid: N/A
Abstract The chemical ionization mass spectra of fluorescamine and fluorescamine - amino acid derivatives have been studied using methane and ammonia as reagent gases. Major ions in the spectra are protonated molecular ions, adduct ions and ions formed by loss of an oxygen atom. Fluorescamine, 4-phenyl-spiro[furan-2(3H),1′-phthalan]3,3′-dione, is a powerful new fluorogenic reagent for assaying primary amines.1 and EI2 and EI3 mass spectrometric investigations of fluorescamine and its derivatives were carried out. Our present study reports the CI mass spectral analysis of fluorescamine and some of its amino acid derivatives.
Turczan, John W.; Medwick, Thomas
doi: 10.1080/00032717708059224pmid: N/A
Abstract NMR analytical procedures are described for the qualitative and quantitative determination of amygdalin. The spectrum is very specific for amygdalin, particularly the sugar region. The optical nature may be conveniently ascertained from the chemical shifts of the aglycone methine hydrogens and the relative optical purity determined by comparing the corresponding peak areas. Satisfactory analyses of amygdalin-containing tablets have been carried out with a precision of 1.2% and accuracy of less than 1%.
Kodama, M.; Shimizu, S.; Sato, M.; Tominaqa, T.
doi: 10.1080/00032717708059225pmid: N/A
Abstract In the atomic absorption spectrophotometry of chromium with the air-acetylene flame, the absorption of chromium was increased by about 120% in the presence of sodium dodecyl sulfate (SDS) above the critical micelle concentration (CMC). This phenomenon was applied to overcoming interferences from many coexisting cations and some acids.
doi: 10.1080/00032717708059226pmid: N/A
Abstract A cold vapor introduction system has been developed for the rapid detection of sub-nanogram amounts of mercury by plasma emission spectrometry. Operational parameters affecting response have been evaluated and optimum values are presented. The system appears to be free of spectral interferences. It has been applied to the analysis of marine sediments and organisms and coastal seawater.
Gladney, Ernest S.; Goode, William E.
doi: 10.1080/00032717708059227pmid: N/A
Abstract A study has been made of the behavior of Be in solution during long term storage at low concentrations.
Soignet, D. M.; Boudreaux, G. J.; Stanley, J. B.; Thornsberry, W. L.
doi: 10.1080/00032717708059228pmid: N/A
Abstract Analytical methods are described for determining the concentration ratio of trioctylphosphine oxide (TOPO) and di(2-ethylhexyl)phosphoric acid (D2 EHPA) in hydrocarbon solvents or in mixtures where the D2 EHPA is the solvent. The Electron Spectroscopy for Chemical Analysis (ESCA) method was used to analyze the mixtures for the relative amounts of phosphine oxide-phosphorus to phosphoric acid-phosphorus as well as the variance with the mixture composition of the Ols/P2p signal intensity. The nmr signal strength of the protons of the oxymethylene group of the D2 EHPA and the signal strength of the other protons of D2 EHPA and TOPO were measured in solutions of varying concentrations of D2 EHPA and TOPO. Mass spectral comparisons of the molecular ion strengths of TOPO and D2 EHPA were also correlated with mixture composition.
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