Patent ID: 8358409

Claim:
An atomic absorption mercury analyzer including an optically coupled photo detector, an analytical cell, a modulator of radiation polarization and a spectral lamp containing a discharge cavity located between magnet poles and connected with a means of electrical discharge excitation, with buffer gas and mercury placed into the spectral lamp, wherein the mercury placed in the spectral lamp is enriched with a mercury isotope with an even number of neutrons and atomic weight either 198 or 196, this isotope making at least 50% of the total quantity of mercury in the spectral lamp, wherein the discharge cavity in the spectral lamp is made in a form of a capillary and is connected with a ballast cavity made in a form of a bulb with the volume exceeding the volume of the discharge cavity, with the means of electrical discharge excitation, the discharge cavity and the ballast cavity embodied with the possibility of exciting a discharge in the discharge cavity that does not penetrate into the ballast cavity.