1975 Volume 48 Issue 6 Pages 1790-1794
The present method was developed as a way of modifying intensity using the mass-absorption coefficient of the matrix, which is itself obtained from the measurement of the intensity at an arbitrary scattered wavelength. This modification, derived from the simplified equation by the utilization of the known matrix composition, has been empirically demonstrated, and it has been applied to various river-sediment samples. Repeated analyses on copper and zinc in representative sediments were carried out, and the average (\barx) and the coefficient of the variation (c.v.) obtained by the present method and by the atomic-absorption method were compared. In the former method, \barx=1,550 μg/g, c.v.=4.25% on copper, \barx=4,400 μg/g, and c.v.=7.11% on zinc; in the latter method, \barx=1,500 μg/g, c.v.=9.87% on copper, \barx=4,330 μg/g, and c.v.=13.03% on zinc.
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