University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Eisei Kagaku

  • Publisher:
  • FAD Code: EIKG
  • CODEN: JJTHEC
  • ISSN: 0013-273X
  • Abbreviation: Eisei Kagaku
  • DOI Prefix: 10.1248/jhs1956
  • Other Name(s): Journal of Hygienic Chemistry, Japanese Journal of Toxicology and Environmental Health, Journal of Health Science
  • Language: Japanese
  • Comments: Fulltext from 1956 V1

Citations 3

"Determination Of Dibutyltin And Dioctyltin Compounds In PVC Food Containers, Wrappings And Clothes By Reversed-phase HPLC With Column Switching"
Eisei Kagaku 1990 Volume 36, Issue 1 Pages 15-20
HARUNOBU NAKASHIMA, SHINJIRO HORI, HIROYUKI NAKAZAWA

Abstract: A 5-g sample of shredded PVC food container or wrapping was extracted with a mixture of CCl4 and methanol under reflux; the extract was concentrated and then diluted with methanol to 5 mL. Chopped sample (1 g) of clothes was heated under reflux with methanolic 0.1% HCl, the extract was concentrated and diluted with methanol to 10 mL. Dioctyltin compounds (20 µL) were determined on an Asahipak GC-310H column (25 cm x 7.6 mm) at 40°C with 10 mM KH2PO4 buffer of pH 2 - methanol (2:3) as mobile phase (1 mL min-1). Dibutyltin compounds were separated from dioctyltin compounds on a Shodex DE-613p column with 10 mM phosphate buffer of pH 2.3 - methanol (1:1) as mobile phase, and then determined on a Shodex RSpak DE-613 column (15 cm x 6 mm) at 35°C with the same mobile phase (1 mL min-1). Post-column derivatization was performed with 0.1 mM morin in methanol followed by fluorescence measurement at 500 nm (excitation at 420 nm). Recoveries were 98 to 100% and detection limits were 10 ng.
Dibutyltin Dioctyltin Polymer Commercial product HPLC Fluorescence Sample preparation Post-column derivatization

"Determination Of Polyphosphates By High Performance Liquid Chromatography. Application To Soft Drinks"
Eisei Kagaku 1988 Volume 34, Issue 1 Pages 70-74
AKINOBU MATSUNAGA, ATSUSHI YAMAMOTO, EIICHI MIZUKAMI, KAZUICHI HAYAKAWA, MOTOICHI MIYAZAKI

Abstract: Linear polyphosphates (P2 to P9) were separated by anion-exchange HPLC on a column (7.5 cm x 7.5 mm) of TSK gel DEAE-5 PW, protected by a column (1 cm x 6 mm) of TSK guard gel DEAE-5 PW, with a gradient mobile phase (1 mL min-1) of 0.02 to 0.15 M NaNO3 (held for 5 min) in 0.01 M HNO3 over 25 min and then to 0.02 M NaNO3 (held for 25 min) over 5 min. The polyphosphates were detected online at 500 nm after post-column reaction with 0.5 mM FeCl3 containing 2.5 mM sulfosalicylic acid at room temperature (flow rate 0.5 mL min-1). The method was applied to soft drinks after mixing the sample with an equal volume of 0.01 M HNO3 and filtration (0.45 µm). The determination limit was 0.02 mmol kg-1 of all polyphosphates.
Polyphosphates Soft drink HPIC Spectrophotometry Post-column derivatization

"Flow Injection Analysis Of Cyanide In Wastewater From Metal Plating Process"
Eisei Kagaku 1984 Volume 30, Issue 1 Pages 7-13
CHIYOMI OKUMOTO, MACHIKO NAGASHIMA, SHIGERU MIZOIRI, MASAYOSHI KAZAMA, KAZUYUKI AKIYAMA

Abstract: The sample (at 1.2 mL min-1) was mixed with aqueous 2% H2SO4 (0.4 mL min-1) to adjust the pH to <2 and the solution was mixed with a carrier flow of aqueous 10% NaCl (2.0 mL min-1). The liberated HCN diffused via a PTFE membrane in a gas diffusion cell at 40°C into a stream of 0.1 M NaOH (1.2 mL min-1), and this collector stream was monitored with a CN--selective electrode. By use of a calculated mean HCN permeability of 34% at 1 µg mL-1, a rectilinear calibration graph was obtained in the range 0.3 to 100 µg mL-1 of CN-. Forty samples could be analyzed in 1 h.
Cyanide Waste Electrode Heated reaction Teflon membrane Process control Gas diffusion