Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Danton D. Nygaard"'
Autor:
Danton D. Nygaard
Publikováno v:
Analytical Chemistry. 51:881-884
Autor:
Danton D. Nygaard
Publikováno v:
Analytica Chimica Acta. 127:257-261
Sulfide and sulfite ions in aqueous solution are converted through acidification to hydrogen sulfide and sulfur dioxide, which are purged from solution with nitrogen carrier gas. The volatile species are detected through oxidation in 1 M sulfuric aci
Autor:
Joe H. Lowry, Danton D. Nygaard
Publikováno v:
Analytical Chemistry. 54:803-807
Autor:
Danton D. Nygaard
Publikováno v:
Analytica Chimica Acta. 130:391-394
Nitrite in aqueous solution is reduced to nitric oxide with hydroquinone in pH 2 phosphate buffer. The nitric oxide is swept with nitrogen to an anodically polarized membrane-covered platinum electrode, where it is oxidized to nitrate. The resulting
Autor:
David A. Leighty, Danton D. Nygaard
Publikováno v:
Applied Spectroscopy. 39:968-976
Atomic and singly ionic elemental emission lines, observed while 1000 mg/L stock solutions were being nebulized, are listed by element and by wavelength for the spectral region between 160 nm and 200 nm. Relative emission intensities are given for ea
Autor:
Danton D. Nygaard, Thomas R. Gilbert
Publikováno v:
Applied Spectroscopy. 35:52-56
Emission line enhancement in a dc plasma seeded with an easily ionizable matrix salt is discussed. Enhancement is shown to be inversely related to the ionization potential of the matrix element. The temperature of the plasma core is shown to decrease
Autor:
Danton D. Nygaard
Publikováno v:
Analytical Chemistry. 52:358-360
Autor:
David A. Leighty, Danton D. Nygaard
Publikováno v:
Applied Spectroscopy. 39:353-354
A paper recently published in this journal provides a thorough discussion of intra-alkali matrix effects that occur in the initial radiation zone (IRZ) of the inductively coupled plasma; the matrix effects described are of the analyte emission enhanc
Autor:
Danton D. Nygaard
Publikováno v:
Analytical Chemistry. 53:555-556
Autor:
Danton D. Nygaard, John J. Sotera
Publikováno v:
Journal of AOAC INTERNATIONAL. 70:760-761
A modification of an inductively coupled plasma (ICP) emission spectrometer is described that enables the simultaneous determination of nitrogen, phosphorus, and potassium in water-soluble fertilizers. A quartz extension tube is added to the ICP torc