A survey of investigations performed by our group over the last few years whose goal was to obtain analytical, clinical and pharmacokinetic data concerning cancer chemotherapy with Pt-based drugs is reported. From this standpoint the use of inductively coupled-plasma atomic emission spectrometry for determining Pt levels in biological samples is discussed, particularly as regards: 1) the amelioration of sample introduction procedures into the torch in the case of micro-sampling and 2) the investigation of plasma drug distribution by means of liquid chromatography techniques. Clinical studies evaluated therapeutic response and toxicity during regional and systemic treatments with Cisplatin and Carboplatin against solid tumors in adults as well as in children. Several pharmacokinetic parameters such as plasma half-lives for free and protein-bound drug, tissues exposure as determined by AUC and urinary excretion are examined.