Skip to main content
SpringerLink
Log in

The Identification of Chemical Species of Silica in Sodium Hydroxide, Potassium Hydroxide and Sodium Chloride Solutions by FAB-MS

  • Published:
Analytical Sciences Aims and scope Submit manuscript

Abstract

The chemical species produced by dissolving silica in sodium hydroxide (NaOH) and potassium hydroxide (KOH) solutions were measured by FAB-MS (fast atom bombardment mass spectrometry). As a system for a comparison, silica gel was dissolved in a sodium chloride (NaCl) solution. The pH of the NaCl solution was controlled and a NaCl solution containing silica was measured by FAB-MS. NaOH and KOH solutions contain the monomer (Si(OH)3O-; m/z=95), monomer-Na+ and K+ complexes (Si(OH)2O2Na-; m/z=117, Si(OH)2O2K-; m/z=133), dimer (Si2(OH)5O2-; m/z=173), dimer-Na+ and K+ complexes (Si2(OH)4O3Na-; m/z=195, Si2(OH)4O2K-; m/z=211), cyclic tetramer (Si4(OH)7O5-; m/z=311), linear tetramer (Si4(OH)9O4-; m/z=329) and cyclic tetramer-Na+ and K+ complexes (Si4(OH)6O6Na-; m/z=333, Si4(OH)6O6K-; m/z=349). The results for the monomer, dimer and cyclic tetramer silica observed in our study are consistent with the results of a 29-Si NMR measurement. The relative-intensity ratios of these species vary with the pH. It is notable that the production rate of the dimer is superior to those of other chemical species, such as the monomer, monomer-Na+, cyclic tetramer and linear tetramer in NaOH solution. In a KOH solution, the dimer concentration increases initially and becomes constant when the cyclic tetramer concentration starts to increase with increasing pH. In a NaCl solution, monomer-Na+ complexes (Si(OH)2O2Na-; m/z=117, Si(OH)O3Na2-; m/z=139), dimer (Si2(OH)5O2-; m/z=173), dimer-Na+ complexes (Si2(OH)4O3Na-; m/z=195, Si2(OH)3O4Na2-; m/z=217, Si2(OH)2O5Na3-; m/z=239), trimer (Si3(OH)7O3-; m/z=251), trimer-Na+ complexes (Si3(OH)6O4Na-; m/z=273, (Si3(OH)5O5Na2-; m/z=295), cyclic tetramer (Si4(OH)7O5-; m/z=311), and cyclic tetramer-Na+ complexes (Si4(OH)6O6Na-; m/z=333, Si4(OH)5O7Na2-; m/z=355) of silica are observed. NaCl solution contains monomer-Na+ (m/z=117), dimer (m/z=173), dimer-Na+ (m/z=195), cyclic tetramer (m/z=311) and cyclic tetramer-Na+ (m/z=333) complexes, which are in chemical equilibrium, and their relative intensity ratios are almost constant regardless of the pH of the solution.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. P. H. Santshi and P. W. Schindler, J. Chem. Soc. Dalton Trans., 181 (1974).

  2. R. K. Iler, J. Phys. Chem., 57, 604 (1953).

    Article  CAS  Google Scholar 

  3. G. B. Alexander, J. Am. Chem. Soc., 75, 2887 (1953).

    Article  CAS  Google Scholar 

  4. L. S. D. Glasser and E. E. Lachowski, J. Chem. Soc. Dalton Trans., 393 (1980).

  5. R. K. Harris, C. T. G. Knight and W. E. Hull, J. Am. Chem. Soc., 103, 1577 (1981).

    Article  CAS  Google Scholar 

  6. R. K. Harris and C. T. G. Knight, J. Chem. Soc. Faraday Trans. 2, 79, 1525 (1983).

    Article  CAS  Google Scholar 

  7. R. K. Harris and C. T. G. Knight, J. Chem. Soc. Faraday Trans. 2, 79, 1539 (1983).

    Article  CAS  Google Scholar 

  8. G. B. Alexander, J. Am. Chem. Soc., 76, 2094 (1954).

    Article  CAS  Google Scholar 

  9. C. B. Hurd, R. C. Pomatti, J. H. Spittle and F. J. Alois, J. Am. Chem. Soc., 66, 388 (1944).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. The Tokyo University of Fisheries, Konan, Minato, Tokyo, 108-8477, Japan

    Miho Tanaka

  2. The Institute of Physical and Chemical Research (RIKEN), Hirosawa, Wako, Saitama, 351-0198, Japan

    Kazuya Takahashi

Authors
  1. Miho Tanaka
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Kazuya Takahashi
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tanaka, M., Takahashi, K. The Identification of Chemical Species of Silica in Sodium Hydroxide, Potassium Hydroxide and Sodium Chloride Solutions by FAB-MS. ANAL. SCI. 15, 1241–1250 (1999). https://doi.org/10.2116/analsci.15.1241

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.2116/analsci.15.1241

Keywords

Search

Navigation