A new method to estimate rhodium in different samples at trace levels had been developed. Rhodium was
complexed with 5-(40-nitro-2 0,6 0-dichlorophenylazo)-6-hydroxypyrimidine-2,4-di one (NDPHPD) as a
complexing agent in an aqueous medium and concentr ated by using Triton X-114 as a surfactant. The
investigated rhodium complex was preconcentrated with cloud point extraction process using the non-
ionic surfactant Triton X-114 to extract rhodium comp lex from aqueous solutions at pH 4.75. After the
phase separation at 50 C, the surfactant-rich phase w as heated again at 100 C to remove water after
decantation and the remaining phase was dissolved using 0.5 mL of aceton itrile. Under optimum condi-
tions, the calibration curve was linear for the concentration range of 0.5–75 ng mL 1
and the detection
limit was 0.15 ng mL 1
of the original solution. The enhancement factor of 500 was achieved for
250 mL samples containing the analyte and relative standard deviations were 61.50%. The method
was found to be highly selective, fairly sensitive, simple, rapid and economical and safely applied for rho-
dium determination in different complex materials such as synthetic mixture of alloys and environmen-
tal water samples.
A new method to estimate rhodium in different samples at trace levels had been developed. Rhodium wascomplexed with 5-(40-nitro-2 0,6 0-dichlorophenylazo)-6-hydroxypyrimidine-2,4-di one (NDPHPD) as acomplexing agent in an aqueous medium and concentr ated by using Triton X-114 as a surfactant. Theinvestigated rhodium complex was preconcentrated with cloud point extraction process using the non-ionic surfactant Triton X-114 to extract rhodium comp lex from aqueous solutions at pH 4.75. After thephase separation at 50 C, the surfactant-rich phase w as heated again at 100 C to remove water afterdecantation and the remaining phase was dissolved using 0.5 mL of aceton itrile. Under optimum condi-tions, the calibration curve was linear for the concentration range of 0.5–75 ng mL 1and the detectionlimit was 0.15 ng mL 1of the original solution. The enhancement factor of 500 was achieved for250 mL samples containing the analyte and relative standard deviations were 61.50%. The methodwas found to be highly selective, fairly sensitive, simple, rapid and economical and safely applied for rho-dium determination in different complex materials such as synthetic mixture of alloys and environmen-tal water samples.
การแปล กรุณารอสักครู่..