J. Braz. Chem. Soc. vol.16 número5

The samples were processed along with precision and accuracy batch and concentrations obtained were compared with nominal concentrations to determine the long-term stability

Consequently, these materials can be used as standards of chloromethylated S-DVB copolymers in order to establish a quantitative methodology of chloromethyl group determination

The appropriate choice of the solvent used for the elution of the formed complex is one of the most important parameters for this kind of analytical method. Characteristics such as

values for both [(SnCl 4 ) 2 - μ -TPP] and [SnCl 4 (DPS)] suggests that in the former each Sn(IV) center is hexacoordinate and thus, TPP binds to each stannylated site through

A simple, rapid and sensitive spectrophotometric method has been developed for the determination of periodate in solution and river water samples.. The method is based on the

Figure 2 shows the results obtained for the adsorption of Cd(II) on alumina, silica, and two important clay minerals (montmorillonite and kaolinite) at pH 7.0 and 25°C, in the

Additionally, a higher production of monochloramine was observed for hypochlorite solutions prepared by sonication of the solution containing CCl 4 in 0.01 mol L -1 NaOH

Liquid chromatography of this material over silica gel using a mixture of petroleum ether and diethyl ether (1:1) gave 0.71 g (60%) of the chromatographically pure product as