Abstract: The present invention in one aspect relates to a process for the simultaneous removal of NO.sub.x and SO.sub.2 from a fluid stream comprising mixtures thereof and in another aspect relates to the separation, use and/or regeneration of various chemicals contaminated or spent in the process and which includes the steps of:(A) contacting the fluid stream at a temperature of between about 105.degree. and 180.degree. C.

Abstract: A method of atomic spectroscopy is provided involving the steps of inserting a probe into a cuvette, depositing a sample to be atomized onto the probe by means of a sample dispenser, withdrawing the probe from the cuvette, heating the cuvette to a desired temperature sufficient to atomize the sample, and then reinserting the probe into the cuvette. The sample dispenser may be a manually-operated pipette, or the dosing tube of an autosampler. Liquid samples may be dried by heating the cuvette to a temperature lower than the atomization temperature before withdrawing the probe from the cuvette. Both solid and liquid samples may be atomized by this procedure. Such samples also may be ashed where appropriate by heating the cuvette to a second temperature between the first temperature and the atomization temperature before withdrawing the probe from the cuvette. A spectrophotometer using the technique is also described.

Abstract: The present invention in one aspect relates to a process for the simultaneous removal of NO.sub.x and SO.sub.2 from a fluid stream comprising mixtures thereof and in another aspect relates to the separation, use and/or regeneration of various chemicals contaminated or spent in the process and which includes the steps of:(A) contacting the fluid stream at a temperature of between about 105.degree. and 180.degree. C.

Abstract: An electrothermal atomizer comprises a cuvette (1) clamped between two electrodes (2,3) to which an electrical power supply (4) is connected. A probe comprising a tubular head portion (5) and a stem portion (6) is insertable in and removable from the cuvette (1) by means of a rack (9) driven by a motor via a gear (10).By making the probe head (5) in the form of a tube, a large sample volume can be accommodated, and by forming the stem (6) at the top of the tube (5), spreading of acid samples along the stem during the drying phase is minimized.