Study of Composition and Dissolving Ability of Dissolving Agents for Gypsum Products

• HAYASHI Junko

  Dental Technician Training School, Nihon University School of Dentistry

• KANEKO Kazuyuki

  Dental Technician Training School, Nihon University School of Dentistry

• INOUE Toyonori

  Dental Technician Training School, Nihon University School of Dentistry

• SHIMOMURA Kazunori

  Department of Dental Materials, Nihon University School of Dentistry

• YOKOSE Katsumi

  Department of Chemistry, Nihon University School of Dentistry

• HIROSE Hideharu

  Department of Dental Materials, Nihon University School of Dentistry Division of Biomaterial Science, Dental Research Center, Nihon University School of Dentistry

• NISHIYAMA Minoru

  Department of Dental Materials, Nihon University School of Dentistry Division of Biomaterial Science, Dental Research Center, Nihon University School of Dentistry

• KURODA Takashi

  Dental Technician Training School, Nihon University School of Dentistry Department of Operative Dentistry, Nihon University School of Dentistry

Bibliographic Information

Other Title

• 石膏溶解剤の成分と溶解性能に関する研究

Abstract

Twelve dissolving agents for gypsum products were analyzed by IR. WDX and TG-DTA, and the main component was identified. The pH of dissolving agents was measured before and after immersion of the set gypsum specimen in the dissolving agent. Solubility of gypsum in dissolving agents was measured at 1,2 and 3 hours after immersion. The main component was highly estimated with N-(2-Hydroxyethyl)ethylenediamine-N,N',N'-triaceticacid trisodium salt. The solid content was 10.4-31.8%. The pH of unused dissolving agents was 8-9 in 10 products and over 13 in 2. The solubility of the gypsum increased with the increase in immersion time, and it became 100% at 2-3 hours after immersion in the pH 8-9 products, and 14.3-37.4% at 3 hours after immersion in the pH > 13 products.

Journal

• The Journal of the Japanese Society for Dental Materials and Devices

  The Journal of the Japanese Society for Dental Materials and Devices 23 (4), 279-286, 2004

  The Japanese Society for Dental Materials and Devices

Keywords

• Gypsum
• pH
• IR
• EPMA
• Solubility

Details

• CRID: 1390282679187675776
• NII Article ID: 110002989691
• NII Book ID: AN00127279
• DOI: 10.18939/jjdm.23.4_279
• ISSN: 21884188
• ISSN: 02865858
• Web Site: https://search.jamas.or.jp/link/ui/2004309872
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed