“…Multiple injection technique has been applied to in situ preconcentration of several metals such as nickel, 15,16 manganese, 16 cobalt, 16 iron, 16 copper, 16,17 molybdenum, 18,19 cadmium, 20,21 lead, 22 silicon 23 and chromium. 16,24 With this procedure, limits of detection in the ng L 21 level have been reached. No literature reference appears to be available on using multiple injections or ETAAS for arsenic analysis in naphtha samples.…”