Liquid chromatography on silica using mobile phases containing aliphatic carboxylic acids

Green, John B.; Hoff, Robert J.

doi:10.1016/s0021-9673(00)81586-1

Cited by 16 publications

(4 citation statements)

References 34 publications

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“…(1) Hearn, . T. W. "Advances in Chromatography"; Biddings, J. C., Liquid Chromatographic Separation of Aromatic Hydrocarbons with Chemically Bonded (2,silica Patrick L. Grizzle* and Jane S. Thomson Bartlesville Energy Technology Center, U.S. Department of Energy, P.O. Box 1398, Bartlesville, Oklahoma 74003 A detailed comparison of alumina and chemically bonded silica-R(NH2)2 and (2,4-dinitroanlllnopropyl)slllca (DNAP-sllIca) for the compound-class (ring-numbered) high-performance liquid chromatographic separation of aromatic hydrocarbons was made with 86 model compounds either expected or known to be present In petroleums, coal liquids, or shale oils.…”

Section: Literature Citedmentioning

confidence: 99%

Liquid chromatographic separation of aromatic hydrocarbons with chemically bonded (2,4-dinitroanilinopropyl)silica

Grizzle¹,

Thomson²

1982

Anal. Chem.

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i a v i TPeABr TPeAF TPeABr Figure 8. Effect of eluent anion on the separation of swlfas and aminobenzloic acids on PRP-1 in the presence of TPeA'. The mobile phase conditions are 1 3 CH,CN:H,O, 1.00 X M TPeABr or TPeAF, 1 .OO X M NaOH at a flow rate of 1 .OO mUmin, V o = 1.23 mL.the absence of TPeA+ no retention of the mixture is obtained.If the mobile phase pH is reduced to 7.2, the three hydroxybenzoic acids (diprotic acids which are doubly charged at pH 11) are only singly charged and the retention order with improved resolution becomes p-hydroxybenzoic acid < mhydroxybenzoic acid < benzoic acid < phenol < o-hydroxybenzoic acid.Equation 11 is not restricted only to retention of organic anionic aiialytesi. Since the major equilibrium constant influencing retention represents anion selectivity, it should also be possible to separate inorganic anions on PRP-1 in the presence of R4Nt salts. Not only do the experimental results fit the model but many useful inorganic anion separations are possible, even at, trace levels. These studies will be reported in detail in a subsequent report.

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Section: Literature Citedmentioning

confidence: 99%

Liquid chromatographic separation of aromatic hydrocarbons with chemically bonded (2,4-dinitroanilinopropyl)silica

Grizzle¹,

Thomson²

1982

Anal. Chem.

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“…Sample Preparation. The SRC II process coal liquid, from Pittsburgh seam coal, was distilled, and the fraction boiling be- A TOSCO process shale oil >200 °C distillate from the Western Research Institute (formerly Laramie Energy Technology Center), and a Wilmington, CA, crude oil 370-535 °C distillate from the API Project 60 had acids and bases removed by ion exchange chromatography according to Green et al (18). The SRC II and Wilmington hydrocarbons were separated into aromatic ring number compound classes using preparative chromatography described elsewhere (6,(19)(20)(21).…”

Section: Methodsmentioning

confidence: 99%

“…Although calculation of the yield of each compound class by using UV absorbtivities is obviously a less desirable method than using gravimetric results, these comparisons allow useful conclusions to be drawn. 0Preparative alumina column (18). 6Preparative DNAP column (6).…”

Section: Methodsmentioning

confidence: 99%

Separation of aromatic hydrocarbons using bonded-phase charge-transfer liquid chromatography

Thomson¹,

Reynolds²

1984

Anal. Chem.

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“…For details of fhe method and example applications, see Bhan et al (1987), Green (1981), Green and Hoff (1981), Green and Grizzle (1982) and Green et al (1985a). Figure 5B shows typical fractions obtained from preparative subfractionation of bases.…”

Section: Base Concentratesmentioning

confidence: 99%

Liquid Chromatographic Separations as a Basis for Improving Asphalt Composition-Physical Property Correlations

Green

Reynolds

1989

Fuel Science and Technology International

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It is widely known that asphalts yielding similar re:;ults in standard tests like penetration may in fact exhibit significantly difEerent performance with respect to product manufacturing, application, or durability.Thus, a need exists for more definitive testing, especially with respect to defining the chemical composition of asphalt. Direct spectroscopic analysis of asphalt is diEEicult because of its compositional complexity, high degree of association between compounds present, and high. overall average molecular weight/boiling range.Hence, prior liquid chromatographic separation into compound classes or types can greatly enhance the level of information obtainable from spectroscopic methods, as well as provide information on types and quantities of compounds present. The scheme discussed involves initial separation into acid, base, and neutral types using Downloaded by [The University Of Melbourne Libraries] at 09:16 11 October 2014 1328 GREEN, REYNOLDS AND YUnonaqueous ion exchange chromatography, followed by subfractionation of each type into more discrete compound class fractions using a variety of normal phase high performance liquid chromatographic (HPLC) methods.Material recoveries on residual materials typically range from 95-105 weight percent. Details of the scheme, example applications, and results from analysis of fractions are discussed.

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Liquid chromatography on silica using mobile phases containing aliphatic carboxylic acids

Cited by 16 publications

References 34 publications

Liquid chromatographic separation of aromatic hydrocarbons with chemically bonded (2,4-dinitroanilinopropyl)silica

Liquid chromatographic separation of aromatic hydrocarbons with chemically bonded (2,4-dinitroanilinopropyl)silica

Separation of aromatic hydrocarbons using bonded-phase charge-transfer liquid chromatography

Liquid Chromatographic Separations as a Basis for Improving Asphalt Composition-Physical Property Correlations

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