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Abstract
When a graphite-cup cuvette was covered with a graphite lid, cadmium vapour released from tin was enclosed in the cuvette, and consequently, a high intensity of the coherent forward scattered cadmium radiation was obtained, while the influence of tin could be eliminated. Cadmium below 0.1 ppm in solid tin was determined using a calibration curve constructed with a standard solution of cadmium in the presence of “pure tin”. The detectable lowest concentration was 1 ppb of cadmium, which corresponds to 3 pg of cadmium in 3.5 mg tin. For the determination of zinc in tin, the same analytical procedure as for determining cadmium in tin was used.
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