Determination of lead in irons and steels by atomic-absorption spectrophotometry with the introduction of solid samples into an induction furnace

Abstract

Atomic-absorption spectrophotometry with an induction furnace has been used for the determination of 0.1–100 µg g^–1 of lead in 1–12-mg samples of irons and steels dropped into the furnace. Calibration graphs of peak absorbance versus mass of lead have been constructed by using standard steels.

Samples of alloys can be added to the furnace at 4–5-min intervals. Information is presented on the calibration graphs and on the accuracy, precision and limits of detection of the method for 44 irons and steels. With steels containing more than 1 µg g^–1 of lead relative standard deviations are usually ⩽10%. The limit of detection for lead is ⩽0.05 µg g^–1 when using this method.