INSTRUMENTAL AND ANALYTICAL METHOD FOR TH E DETERMINATION OF LEAD TRACES WITH ATOMIC-ABSORPTION MEASUREMENTS IN A CONTIFLOW SYSTEM

An efficient hydride technique was developed for the separation and en richment of lead traces from water and air. Flame heated quartz cuvett e was used for hydride decomposition and the tracelevel lead contents of water (similar to 1 mu g/dm(3)) were measured by means of atomic ab sorption method. Samples from air were collected by bubbling air throu gh a nitric acid solution. A flow injection version was also elaborate d allowing to achieve a detection limit of 17 ng from 200 mu l solutio n.