SEMIAUTOMATIC DETERMINATION OF TIN IN MARINE MATERIALS BY CONTINUOUS-FLOW HYDRIDE GENERATION INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY

A semi-automated continuous flow hydride generation system with induct ively coupled plasma atomic emission spectrometry (ICP-AES) was used f or the determination of tin in marine materials. The effects of acids (H2SO4 and HCl) were studied. The analytical parameters were thoroughl y investigated. Under optimized conditions, the detection limit is 0.4 ng/ml. Interferences from transition elements were investigated and s even masking reagents were tested. L-cysteine hydrochloride monohydrat e (1%) was used to mask the interferences from foreign ions. Finally, the accuracy, checked with a marine standard reference material obtain ed from the National Research Council (NRC), was within the certified value.