Characterization of silica dissolved in sodium chloride solution using fast atom bombardment mass spectrometry

Tanaka, Miho; Takahashi, Kazuya

doi:10.1002/1096-9888(200007)35:7<853::aid-jms9>3.0.co;2-r

Cited by 24 publications

(26 citation statements)

References 7 publications

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“…Relative peak signal intensity ratios of silica species in seawater According to our previous studies, 21,26 the behavior of silica in solution is affected by coexisting salts. In particular, the signal intensity ratio of the [cyclic tetramer] À to the [linear tetramer] À changes critically when salting-out occurs.…”

Section: Silica Species In Seawatermentioning

confidence: 99%

“…Details of the speciation of silica in solutions have been described in our previous reports. [20][21][22] The main silica species indicated by the ions in Figs. 4(a) and 4(b) are listed in Table 2 and Fig.…”

Section: Silica Concentrationmentioning

confidence: 99%

“…We have studied silica species and their applications to several systems. [20][21][22][23][24][25][26] For seawater samples, the determination of silica species is generally performed by colorimetry, using molybdate yellow, and by inductively coupled plasma atomic emission spectrometry (ICP-AES). For the chemical speciation of silica, we have employed fast-atom bombardment mass spectrometry (FAB-MS).…”

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confidence: 99%

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First application of the depth profile of silica species as a tracer by fast‐atom bombardment mass spectrometry: investigation of the circulation of seawater and silica uptake by diatoms

Tanaka¹,

Takahashi²,

Urabe³

et al. 2009

Rapid Comm Mass Spectrometry

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Silica, represented by SiO 2 , is the general name for the compounds composed of Si, O and H with their derivative complexes. Silica forms various chemical species in aquatic solutions, such as a monomer (Si(OH) 2 ), and others. These species are known to vary in their relative abundances in solution depending on the chemical and physical conditions. Silica species dissolved in seawater have been examined by fast-atom bombardment mass spectrometry (FAB-MS) to elucidate the behavior of silica and its circulation as a novel tracer reflecting the chemical and physical conditions of seawater and the bioactivity of diatoms, which take up silica. In the seawater of Tokyo Bay, silica species such as ) were observed and assigned by FAB-MS. To investigate the suitability of silica species as a tracer, the relative peak intensity ratios of silica species observed in the mass spectra, i.e. the profiles of the ratio of the linear tetramer to the cyclic tetramer (m/z 329/311) and the ratio of the dimer to the cyclic tetramer (m/z 173/311) against depth, were examined to determine the annual changes and reproducibility of the depth profiles. In particular, the depth profile of the relative ratio of the linear tetramer to the cyclic tetramer, 329/311, exhibits critical changes depending on the seawater budget. These changes in the relative ratios were identified by an experiment involving a simple sodium chloride solution system. Our measurement is expected to elucidate the dynamics of silica and its role as 'food' for diatoms, and we showed that speciation using mass spectrometry is a powerful tool for examining elemental behavior in nature and environmental changes. Our results suggest that a silica tracer is useful for investigating the behavior of seawater in small coastal regions and the uptake of silica by diatoms.

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Section: Silica Species In Seawatermentioning

confidence: 99%

Section: Silica Concentrationmentioning

confidence: 99%

mentioning

confidence: 99%

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First application of the depth profile of silica species as a tracer by fast‐atom bombardment mass spectrometry: investigation of the circulation of seawater and silica uptake by diatoms

Tanaka¹,

Takahashi²,

Urabe³

et al. 2009

Rapid Comm Mass Spectrometry

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“…Tanaka and Takahashi have studied procedures for identification of the chemical species of silica by FAB-MS (fast atom bombardment mass spectrometry) [5,6,7,8]. For the chemical speciation purposes they determined the chemical species of "dissolved" silica in sodium chloride (NaCl) solution [6,7], and in calcium chloride (CaCl 2 ) solution [8] by FAB-MS.…”

Section: Introductionmentioning

confidence: 99%

“…For the chemical speciation purposes they determined the chemical species of "dissolved" silica in sodium chloride (NaCl) solution [6,7], and in calcium chloride (CaCl 2 ) solution [8] by FAB-MS. In NaCl solution the monomer, dimer, trimer, cyclic tetramer, linear tetramaer, cyclic pentamer, linear pentamer, cyclic hexamer, and linear hexamer were identified [7].…”

Section: Introductionmentioning

confidence: 99%

Speciation of dissolved silicates in natural waters containing alkaline and alkaline-earth ions

Tanaka

Takahashi²

2004

Analytical and Bioanalytical Chemistry

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The concentration of silica in water samples from the desert area of Xinjiang, N. W. China, has been measured by colorimetry with ammonium molybdate. The observed pattern of dependence of the concentration of silica on the concentration of sodium ion (Na(+)) in the water samples is consistent with the pattern obtained by experiments on in-vitro dissolution of silica gel in sodium chloride (NaCl) solution. This indicates that the dissolution of silica in the hydrologic system in this area depends on the concentration of Na(+). Calcium ion (Ca(2+)), which is known to play an important role on the dissolution of silica on the basis of in-vitro experiments, was observed to take little part in the dissolution of silica in actual natural water samples. This implies that the Ca(2+) is bound to the hydrogen carbonate anion or that the Ca(2+) content of natural water containing salts is very low, owing to precipitation. In these samples silicate-Na(+) was identified as the dissolution species of silica; it was also ascertained that Ca(2+) did not form complexes with silicate species. These observations resulted from direct identification of dissolved chemical species by use of FAB-MS (fast atom bombardment mass spectrometry). The research indicates that in water samples in this critically arid region the concentration of "dissolved" silica is basically determined by the concentration of Na(+), indicative of pure inorganic conditions in the desert area of Xinjiang, N.W. China.

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Current Awareness

2000

J. Mass Spectrom.

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In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of mass spectrometry. Each bibliography is divided into 11 sections: 1 Books, Reviews & Symposia; 2 Instrumental Techniques & Methods; 3 Gas Phase Ion Chemistry; 4 Biology/Biochemistry: Amino Acids, Peptides & Proteins; Carbohydrates; Lipids; Nucleic Acids; 5 Pharmacology/Toxicology; 6 Natural Products; 7 Analysis of Organic Compounds; 8 Analysis of Inorganics/Organometallics; 9 Surface Analysis; 10 Environmental Analysis; 11 Elemental Analysis. Within each section, articles are listed in alphabetical order with respect to author (3 Weeks journals ‐ Search completed at 28th. June 2000)

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Characterization of silica dissolved in sodium chloride solution using fast atom bombardment mass spectrometry

Cited by 24 publications

References 7 publications

First application of the depth profile of silica species as a tracer by fast‐atom bombardment mass spectrometry: investigation of the circulation of seawater and silica uptake by diatoms

First application of the depth profile of silica species as a tracer by fast‐atom bombardment mass spectrometry: investigation of the circulation of seawater and silica uptake by diatoms

Speciation of dissolved silicates in natural waters containing alkaline and alkaline-earth ions

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