Abstract
The construction of a single-beam atomic absorption spectrophotometer is described.A hollowcathode tube is operated by a stabilized d.c.power supply.The emitted radiation, after being chopped at 75 c/s, is passes through the atomic vapour in flame and falls on a monochromator.The output from the photomultiplier is led to a narrow band amplifier with “Twin-T net work.” The amplified signal is rectified and displayed on a recorder.By this procedure, only the signal due to radiation from the source is amplified without the effect of radiation orginated in the flame.
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