| 摘要 |
PURPOSE:To permit analysis of a high-concn. sample by obtaining an atomic absorbancy versus time curve, preliminarily determining the time width at 1/2 the max. value of the absorbancy of that curve, measuring the arbitrary absorbancy of a sample and making computation. CONSTITUTION:A sample is heated by a graphite tube to form atomic vapor and a luminous flux is passed through the vapor. The absorbancy by the atomic vapor is detected and the absorbancy versus time curve P is is obtd. The half- amplitude level (w) of the time at the absorbancy of 1/2 the max. value (h) of the absorbancy in the absorbancy versus time curve P is constant regardless of an element concn. The arbitrary absorbancy (k) and time width (v) of the absorbancy versus time curve P is determined with respect to a desired element and the true max. value (h) of the absorbancy is computed by the equation to analyze the concn. The computation is made by using the half-amplitude level (w) even if the concn. of the desired element is high and the high absorbancy of the absorbancy versus time width curve rolls over; therefore, the measurable upper limit concn. of the element is increased.
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