Furnace atomic absorption with reference channel

Woodriff, Ray; Shrader, Douglas

doi:10.1021/ac60307a031

Cited by 21 publications

(7 citation statements)

References 8 publications

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“…This requirement is a severe limitation in analyses where sufficient quantities of sample are not available. A number of flame-related "sampling boat" (7, <S) and flameless techniques-filaments (9)(10)(11), ribbons (12,13)…”

Section: Resultsmentioning

confidence: 99%

Determination of organic and total lead in the atmosphere by atomic absorption spectrometry

Purdue¹,

Enrione²,

Thompson³

et al. 1973

Anal. Chem.

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Equation 16 provides a practical means for measuring the standard deviation of jitter, ,. If the aperture time and sampling interval are approximately equal, Equation 16shows that the noise spectral density due to jitter increases from zero at zero frequency to a maximum at the Nyquist sampling frequency. Therefore, by digitizing a constant signal, } can be determined from the component of the powerdensity spectrum of the signal that both increases with the mean of the signal and varies with respect to frequency according to Equation 16 (13).

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Section: Resultsmentioning

confidence: 99%

Determination of organic and total lead in the atmosphere by atomic absorption spectrometry

Purdue¹,

Enrione²,

Thompson³

et al. 1973

Anal. Chem.

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“…Apparatus and Materials. The spectroscopic apparatus and the atomic absorption furnace used have been described previously (15,16), and for the sake of brevity will not be repeated here.…”

Section: Methodsmentioning

confidence: 99%

“…A short time ago a new method of filtration using porous graphite was briefly introduced (13), which, when coupled with the atomic absorption furnace of Woodriff et al (14,15), gives both simplicity of use and great sensitivity. Here we intend to consider further some of the aspects of the method not investigated in the brief introductory article, such as the accuracy and sensitivity of the filtration medium compared with membrane filters, as well as other advantages of porous graphite filtration.…”

mentioning

confidence: 99%

Determination of lead in atmospheric particulates by furnace atomic absorption

Lech¹,

Siemer²,

Woodriff³

1974

Environ. Sci. Technol.

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By use of flameless atomic absorption techniques, it is possible to determine traces of lead in atmospheric particulates in very small samples. The implementation of flameless techniques is greatly simplified by using porous graphite as a filter medium. Using the Woodriff furnace as the atomization device and cups made of porous graphite, one can take an air sample and insert the cup into the furnace for determination with no other chemical or physical treatment. The sensitivity of the determination based on a minimum detectable recorder deflection of 1% is 2.5 X 10-12 gram/sample. This is equivalent to 0.005 ^g/m3 for a 100-cc air sample. When a standard particulate generator was used, the porous graphite compared favorably with Millipore filters. Organic lead, however, was not found to be retained by either type of filter. The techniques described should be readily applicable to other types of flameless devices.

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“…Another commercial system uses pulsed hollow cathodes and a half-silvered mirror to accomplish the same task (9). In addition to these methods, systems utilizing Zeeman effect (10), beam polarization (11,12) and dual wavelength spectrophotometers (13) have been used.…”

mentioning

confidence: 99%

Sequential hollow cathodes for background correction in atomic absorption spectrometry

Bath¹,

Amend²,

Woodriff³

1978

Anal. Chem.

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Furnace atomic absorption with reference channel

Abstract: Yno further adjustments are required between different sample positions. With this device, it is easy to observe rotational Raman scattering of 02 and N2 in air, and below 100 Acm-1, the focal region should be purged if these lines interfere with the desired Raman scattering.

Cited by 21 publications

References 8 publications

Determination of organic and total lead in the atmosphere by atomic absorption spectrometry

Determination of organic and total lead in the atmosphere by atomic absorption spectrometry

Determination of lead in atmospheric particulates by furnace atomic absorption

Sequential hollow cathodes for background correction in atomic absorption spectrometry

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