The no-nonsense combination for atomic absorption: Perkin-Elmer's Model 305A with the new HGA-2000 Graphite Furnace.
The new HGA-2000 Graphite Furnace, in combination with the Model 305A Atomic Absorption Spectrophotometer, produces excellent detection limits (see Table) with a new degree of convenience, economy, and versatility. With ihe aid of Perkin-Elmer's unique Deuterium Background Corrector, many solids can be analyzed without pretreatment, including plastics, biologicals, and papers. The Furnace itself, which is basically an electrically heated hollow cylinder continuously purged with nitrogen, sits in the large sample space of the 305A. The control unit is placed on the bench beside the instrument. The sample in the Furnace can be automatically dried, charred, and atomized at any desired temperature (up to 2700°C) for any desired length of time. More automatic features. In a typical determination, the drying and charring cycles may take from 25 seconds to several minutes. To save operator time and recorder paper, the HGA-2000 can be set so that the recorder starts automatically before atomization, and stops automatically after it. There is also an automatic means to increase sensitivity. If the operator wishes, the purge gas flow can be cut off at the moment of atomization, and be left off for several seconds. The sample stays longer in the cylinder, and absorbance is increased. (Pat. pen.)
DOUBLE BEAM DETECTION LIMITS* ELEMENT Aluminum Cadmium Chromium Cobalt Copper Gold Iron Lead Nickel Silicon Silver Zinc
FLAME 0*g/ml.) 0.02 0.0002 0.003 0.01 0.001 0.01 0.005 0.01 0.002 0.02 0.002
