Determination of synthetic amorphous silica in industrial air samples

Lange, B. A.; Haartz, J. C.; Hornung, R.

doi:10.1021/ac00232a042

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Much recent experimentation concerned with developing positive detection of small amounts of asbestos has been carried out. The major methods used are polarized light microscopy, X-ray diffraction, and scanning electron microscopy coupled with energy-dispersive X-ray spectrometry (SEMEDS) (7)(8)(9)(10). Other less common methods include thermal methods such as differential scanning calorimetry (DSC) and Raman spectroscopy (11,12).…”

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Determination of microgram amounts of asbestos in mixtures by infrared spectrometry

Luoma¹,

Yee²,

Rowland³

1982

Anal. Chem.

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confidence: 99%

Determination of microgram amounts of asbestos in mixtures by infrared spectrometry

Luoma¹,

Yee²,

Rowland³

1982

Anal. Chem.

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Sampling and sample preparation of environmental material

Melcher

Peters

Emmel

1986

Topics in Current Chemistry

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Multivariate Calibration Applied to Infrared Spectroscopy for Quantitative Determination of Crystalline and Amorphous Silica

Bjørsvik

Bye

1991

Appl Spectrosc

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The application of infrared spectroscopy for quantitative microanalysis of silica is hindered by one severe difficulty. There is an almost complete spectral overlap in the region around wavelength 800 cm−1, where the various forms of silica have their main absorption band. Multivariate analysis with the use of plsr techniques has been applied to mixtures of α-quartz and fumed amorphous silica, by the calibration of the wavelength region 900-600 cm−1 at 10-cm−1 intervals. The two silica components could be determined simultaneously in concentrations relevant for occupational hygiene control work. The standard deviation of the method is ±1.8%, whereas the relative prediction error is better than ±5.2%. The plsr multivariate calibration techniques are found to be more robust and more accurate than a combined method of infrared spectroscopy and x-ray diffraction for the quantitative determination of silica mixtures. Thus, multivariate calibration offers a rapid, low-cost, and reliable method for the determination of silica polymorphs in low concentrations by infrared spectroscopy, excluding the use of x-ray diffraction. The ability to extract qualitative spectral information from plsr calibrations is demonstrated, and the principle of matrix specific calibration sets is discussed.

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Determination of synthetic amorphous silica in industrial air samples

Cited by 5 publications

References 14 publications

Determination of microgram amounts of asbestos in mixtures by infrared spectrometry

Determination of microgram amounts of asbestos in mixtures by infrared spectrometry

Sampling and sample preparation of environmental material

Multivariate Calibration Applied to Infrared Spectroscopy for Quantitative Determination of Crystalline and Amorphous Silica

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