Furnace for electrothermal atomization of samples for analysis b

Details Furnace for electrothermal atomization of samples for analysis b Furnace for electrothermal atomization of samples for analysis b

1988-06-13

1990-04-17

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

G01N 2174

Patent

active

049174932

ABSTRACT:
An electrically heated tubular body fabricated of pyrolytic graphite in coaxial layers serves to atomize samples for analysis by atomic absorption apectrophotometry. Radially extending graphite rods engage the medial portion of the tubular body at diametrically opposed locations and constitute electrodes for passing an electric heating current transversely through the body. Owing to the characteristic anisotropy of electrical and thermal conductivity of the graphite layers, a relatively high electrical resistance to the current and an even temperature distribution along the length of the tubular body result.

REFERENCES:
patent: 4407582 (1983-10-01), Woodriff
patent: 4579451 (1986-04-01), Lersmacher
Chakrabarti et al., "Capacitive Discharge Heating in Graphite Furnace Atomic Absorption Spectrometry", Anal. Chem., vol. 52, No. 1, Jan. 1980, pp. 167-176.

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