Joseph Sullivan

St. John's University

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M. Douek

St. John's University

Bruce Sitholé

University of KwaZulu-Natal

J. Ing

J. Petillo

Worcester Memorial Hospital

A. D. Forsberg

University of Maryland, Baltimore

Doreen B. Brettler

University of Massachusetts Chan Medical School

P.H. Levine

National Institutes of Health

Kim D. Lamon

Bausch Health (United States)

Lawrence H. Allen

St. John's University

Cooperative Institutions

Worcester Memorial Hospital

Catalyst Paper (Canada)

National Institutes of Health

National Hemophilia Foundation

UMass Memorial Health Care

St. John's University

University of KwaZulu-Natal

Council for Scientific and Industrial Research

Qilu University of Technology

Council of Scientific and Industrial Research

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Initial human studies with factor VIII:C purified from plasma by the use of monoclonal antibodies

Thrombosis Research (1987)

P.H. Levine Doreen B. Brettler Joseph Sullivan A. D. Forsberg J. Petillo

10.1016/0049-3848(87)90049-1

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Citations (3)

Determination of carbohydrates in wood, pulp and process liquor samples by high-performance anion-exchange chromatography with pulsed amperometric detection

Journal of Chromatography A (1994)

Joseph Sullivan M. Douek

Monosaccharide

Ion chromatography

Amperometry

Black liquor

10.1016/0021-9673(94)80259-9

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Citations (31)

Identification and Quantitation of Acetone Extractives of Wood and Bark by Ion Exchange and Capillary GC with a Spreadsheet Program

Holzforschung (1992)

Bruce Sitholé Joseph Sullivan Lawrence H. Allen

Article Identification and Quantitation of Acetone Extractives of Wood and Bark by Ion Exchange and Capillary GC with a Spreadsheet Program was published on January 1, 1992 in the journal Holzforschung (volume 46, issue 5).

10.1515/hfsg.1992.46.5.409

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Citations (33)

Effect of Sample-Related Sources of Error on the Analysis of Pulp and Paper Mill Process Liquids by Ion Chromatography: Part I—Determination of Sulphur Species

Journal of Wood Chemistry and Technology (1993)

M. Douek Joseph Sullivan J. Ing

Abstract Several factors which could affect the accuracy of measurements of sulphur species by ion chromatography have been identified. Analyses of sulphide, sulphite, sulphate and thiosulphate were conducted on samples of kraft liquors, spent sulphite liquor and newsprint white water. Erroneously high results were observed in the determination of sulphide in kraft white and green liquors, presumably due to shifts in equilibrium between elemental sulphur and polysulphide ions during sample dilution. Another problem was encountered during the analysis of sulphite in kraft liquors. Sulphite concentrations in diluted liquors rose rapidly with increase in time between dilution and injection into the ion chromatograph. Evidence presented in this paper suggests that, in diluted kraft liquors containing polysulphide and/or elemental sulphur, the sulphite concentration increases rapidly, possibly due to hydrolysis of elemental sulphur. Determination of thiosulphate was also subject to positive errors, due to oxidation of sulphide to thiosulphate. The effect of storage conditions on the stability of sulphur species was also determined. Room- temperature storage was the most deleterious for white water samples containing low levels of sulphur ions. Long-term stability in all samples was much improved by refrigeration or freezing. Kraft liquors were very stable even when stored at room temperature. Various recommendations are made to maintain sample integrity and minimize analysis errors.

Dilution

Ion chromatography

10.1080/02773819308020527

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Rapid analysis of inorganic and organic anions in kraft pulping liquors by capillary zone electrophoresis

Joseph Sullivan

New methods have been developed for determining and/or speciating several important inorganic sulphur species, including: thiosulphate, sulphate, sulphite, sulphide and polysulphide in kraft pulping liquors and effluents by capillary zone electrophoresis. In addition, several other key anions, including: hydroxide, carbonate, oxalate, formate and chloride can be quantified in the same process liquors. Two approaches were developed for determining the anions. In one method, anions were baseline resolved and quantified using sodium chromate, tetradecyltrimethylammonium hydroxide-based electrolytes with indirect UV-detection. In the second scheme, polysulphide was speciated, and sulphur species such as sulphide, thiosulphate and sulphite, as well as hydroxide were separated and determined using a sodium sulphate, tetradecyltrimethylammonium hydroxide-based electrolyte with direct UV-detection. A third approach, involving the use a 2- (N-Cyclohexylamino) ethanesulfonic acid, hexamethonium hydroxide electrolyte with conductivity detection was also briefly examined and found to be unsuitable for the analysis of sulphide-bearing samples.

Chromate conversion coating

Sodium hydroxide

Isotachophoresis

Metal hydroxide

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Determination of inorganic chlorine species in kraft mill bleach effluents by ion chromatography

Journal of Chromatography A (1998)

Joseph Sullivan M. Douek

Bleach

Ion chromatography