Furnace for electrothermal atomization of samples for analysis by atomic absorption spectrophotometry

摘要

An electrically heated tubular body (10) fabricated of pyrolytic graphite in coaxial layers (12) serves to atomize samples for analysis by atomic absorption spectrophotometry. Radially extending graphite rods (14, 16) engage the medial portion of tubular body (10) 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.