Abstract: An atomic absorption spectrometer is disclosed which includes a monochromater and an optical path defined by a toric mirror, a flat mirror, a flat mirror, a flat mirror, a toric mirror, and a further toric mirror. The toric mirror directs light through entrance slit of the monochromater so that radiation is reflected from diffraction grating and out exit slit to a detector. A sample stage in the form of a furnace is located between the mirrors. The monochromater is oriented so that the entrance slit is arranged transverse to the vertical.

Abstract: An atomic absorption spectrometer is disclosed which includes a monochromater (30) and an optical path defined by a toric mirror (14), a flat mirror (16), a flat mirror (20), a flat mirror (24), a toric mirror (22) and a further toric mirror (26). The toric mirror (26) directs light through entrance slit (32) of the monochromater (30) so that radiation is reflected from diffraction grating (38) and out exit slit (40) to a detector (42). A sample stage (18) in the form of a furnace is located between the mirrors (16) and (20). The monochromater is oriented so that the entrance slit is arranged transverse to the vertical.

Abstract: A burner assembly and a gas box for an atomic absorption spectrometer are disclosed. The burner assembly has a spray chamber (12) for receiving oxygen, fuel and sample material and a burner (11) located on the spray chamber for receiving the mixture so the mixture can be ignited to produce a flame to facilitate analysis of the sample material by atomic absorption of radiation. Pressure transducer (30) is provided for measuring the pressure in the spray chamber so that the pressure is not of a predetermined level the burner can be shut off. A fuel line (29) supplies fuel to the spray chamber (12) and an airline (28) supplies air to the chamber (12). The lines (28) and (29) include flow restrictors (38) and (54) creating an accurate pressure drop thereby ensuring correct mixture of air and fuel.

Abstract: An atomic absorption spectrometer is disclosed which includes a monochromater (30) and an optical path defined by a toric mirror (14), a flat mirror (16), a flat mirror (20), a flat mirror (24), a toric mirror (22) and a further toric mirror (26). The toric mirror (26) directs light through entrance slit (32) of the monochromater (30) so that radiation is reflected from diffraction grating (38) and out exit slit (40) to a detector (42). A sample stage (18) in the form of a furnace is located between the mirrors (16) and (20). The monochromater is oriented so that the entrance slit is arranged transverse to the vertical.

Abstract: A burner assembly and a gas box for an atomic absorption spectrometer are disclosed. The burner assembly has a spray chamber (12) for receiving oxygen, fuel and sample material and a burner (11) located on the spray chamber for receiving the mixture so the mixture can be ignited to produce a flame to facilitate analysis of the sample material by atomic absorption of radiation. Pressure transducer (30) is provided for measuring the pressure in the spray chamber so that the pressure is not of a predetermined level the burner can be shut off. A fuel line (29) supplies fuel to the spray chamber (12) and an airline (28) supplies air to the chamber (12). The lines (28) and (29) include flow restrictors (38) and (54) creating an accurate pressure drop thereby ensuring correct mixture of air and fuel.

Abstract: A spectrometer using Zeeman background correction is disclosed which has a sample producer (100) for producing a cloud of atoms, an electromagnetic radiation source (102) for irradiating the atom cloud, a detector (104) for detecting the radiation after it passes through the atom cloud and an electromagnet (14) for applying a magnetic field to the atom cloud. A power supply and switching unit (106) for powering the electromagnet and switching the electromagnet on and off to create a Zeeman effect are provided. The switching unit has transistors (16-22, 40, 42, 50, 52) controlled by a control circuit (25), and the power supply includes a rectifier (10) and one or more capacitors (12, 12a, 12b). The switching time is typically on the order of 1-1.5 ms or less and the high voltage which is applied is on the order of 400-800 V.