Quantification routines for adsorption studies in static secondary ion mass spectrometry and the effect of ionisation probability

Vickers, P.E.; Castle, J. E.; Watts, John F.

doi:10.1016/s0169-4332(99)00250-0

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…It is extremely sensitive and can detect molecules. In analyzing SO 2 in ppm adsorbed on K-IAC, ToF-SIMS can provide a large amount of information on samples due to its extreme sensitivity and ability to simultaneously analyze organic and inorganic substances ( − ). During the analyses of SO 2 adsorbed K-IAC, tendencies were interpreted by comparison with nonadsorbed K-IAC, strengthening the credibility of the data.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Characteristics of SO₂ on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

Lee¹,

Park²,

Choung³

et al. 2002

Environ. Sci. Technol.

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The adsorption characteristics of SO2 were studied with KOH-impregnated granular activated carbon (K-IAC). To confirm selective SO2 adsorptivity of K-IAC using a fixed bed adsorption column, experiments were conducted on the effects of KOH and of linear velocity, temperature, and concentration. In addition, changes in features before and after adsorption were observed by utilizing FTIR, XRD, ToF-SIMS, and AES/SAM, examining the surface chemistry. K-IAC adsorbed 13.2 times more SO2 than did general activated carbon (GAC). The amount of SO2 adsorbed increased as linear velocity and concentration increased and as temperature decreased. At lower temperature, the dominant reaction between KOH and SO2 produces K2-SO3 and H2O. Any H2O remaining on the surface is converted into H2SO4 as SO2 and O2 are introduced. Then, the KOH and SO2 reaction produces K2SO4 and H2O. The surface characterization results proved that adsorption occurred through chemical reaction between KOH and SO2. The SO2 adsorbed K-IAC exists in the form of stable oxide crystal, K2SO3 and K2SO4, due to potassium. The basic feature given to the surface of activated carbon by KOH impregnation was confirmed to be acting as the main factor in enhancing SO2 adsorptivity.

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Section: Resultsmentioning

confidence: 99%

Adsorption Characteristics of SO₂ on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

Lee¹,

Park²,

Choung³

et al. 2002

Environ. Sci. Technol.

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“…The PMDI adsorption on the aluminium and iron at very low concentration exhibit similar trends, the uptakes of the PMDI rise rapidly up to 1 g L -1 concentration and reach a plateau for iron and a maximum for aluminium. This adsorption behaviour shows typical chemisorption indicating that all the potential adsorption sites on these substrates are occupied by adsorbate molecules [4,[20][21][22][23][24][25]. The adsorption of PMDI on aluminium then slightly drops at 10 g L -1 concentration and then reaches a plateau, whilst the PMDI adsorption on iron increases again above 10 g L -1 concentration.…”

Section: General Adsorption Characteristicsmentioning

confidence: 99%

“…This adsorption behaviour shows typical chemisorption indicating that all the potential adsorption sites on these substrates are occupied by adsorbate molecules. 4,[20][21][22][23][24][25] The adsorption of PMDI on aluminium then slightly drops at 10 g L 21 concentration and then reaches a plateau, whilst the PMDI adsorption on iron increases again above 10 g L 21 concentration. The PMDI solution is well below the concentration limit and can be considered dilute and thus no self-association of the PMDI molecules will occur and adsorption appears to be limited to one monolayer.…”

Section: General Adsorption Characteristicsmentioning

confidence: 99%

A ToF-SIMS investigation of the thermodynamics and bonding of polymeric methylene diphenyl diisocyanate on oxidised aluminium and iron surfaces

et al. 2013

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Polymeric methylene diphenyl diisocyanate (PMDI) is the major component of polyurethane formulations and as a result the adhesion, or indeed abhesion, of polyurethanes, in a variety of forms (foams, coatings and adhesives), to metal substrates will be a function of the interactions between PMDI and metal surfaces. In this paper the adsorption of PMDI on oxidised metal (aluminium and iron) substrates has been investigated. The thermodynamics of adsorption has been examined by the construction of adsorption isotherms derived from ToF-SIMS data. At low solution concentration, the adsorption isotherns of PMDI are not of the Langmuir type, but are shown to conform to Langmuir adsorption at higher solution concentrations (> 1 g L -1 ). The interaction between the PMDI and iron is probably an acidbase interaction, and thus the adsorption of small PMDI molecules is displaced by larger PMDI molecules on the iron surface above a critical solution concentration. By contrast, such displacement is small on the aluminium surface as a result of dominance of covalent bond formation between PMDI and the metal substrate.

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“…A smart mass spectrometric solution might be a way to solve the problem but has not been tried for the TP in LC yet. However, time-of-flight secondary ion mass spectrometry (TOF-SIMS) has been used for quantitative surface analysis and direct measurement of adsorption isotherms. , Mass spectrometry has also been combined with frontal analysis for selective and rapid screening of important inhibitor components in crude extracts. , …”

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confidence: 99%

Development of the Tracer-Pulse Method for Adsorption Studies of Analyte Mixtures in Liquid Chromatography Utilizing Mass Spectrometric Detection

et al. 2008

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The tracer-pulse method provides the real adsorption data points directly from simple, straightforward calculations and is therefore a superior method for multicomponent adsorption isotherm determination in HPLC. Only one important problem has restricted its use so far: the tracer peaks are invisible using any conventional detection principle. We present a solution to this problem with an approach with a firm base in analytical chemistry, utilizing stable isotopes and mass spectrometric detection. The new approach was used for the determination of binary adsorption isotherms, and a systematic investigation was made of its main sources of error. With this modification, the tracer method can be a prime choice for future characterizations of multicomponent separation systems and of competitive drug binding studies.

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Quantification routines for adsorption studies in static secondary ion mass spectrometry and the effect of ionisation probability

Cited by 10 publications

References 11 publications

Adsorption Characteristics of SO₂ on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

Adsorption Characteristics of SO₂ on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

A ToF-SIMS investigation of the thermodynamics and bonding of polymeric methylene diphenyl diisocyanate on oxidised aluminium and iron surfaces

Development of the Tracer-Pulse Method for Adsorption Studies of Analyte Mixtures in Liquid Chromatography Utilizing Mass Spectrometric Detection

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Quantification routines for adsorption studies in static secondary ion mass spectrometry and the effect of ionisation probability

Cited by 10 publications

References 11 publications

Adsorption Characteristics of SO2 on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

Adsorption Characteristics of SO2 on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

A ToF-SIMS investigation of the thermodynamics and bonding of polymeric methylene diphenyl diisocyanate on oxidised aluminium and iron surfaces

Development of the Tracer-Pulse Method for Adsorption Studies of Analyte Mixtures in Liquid Chromatography Utilizing Mass Spectrometric Detection

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Adsorption Characteristics of SO₂ on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation

Adsorption Characteristics of SO₂ on Activated Carbon Prepared from Coconut Shell with Potassium Hydroxide Activation