H-point Standard Addition Method for Determination of Cadmium and Mercury
Poonam P. Kaur, Usha Gupta
Cadmium; mercury; HPSAM
H-point standard addition method (HPSAM) has been applied for simultaneous determination of Cd(II) and Hg(II) using 1-(2-pyridylazo)-2-naphthol (PAN) as a chromogenic reagent in aqueous Triton X-100 micellar media at pH 10.0. Cd(II) and Hg(II) can be determined simultaneously in the concentration range 0.112-1.405 μg mL-1 and 0.201-2.507 μg mL-1 respectively. The proposed method has successfully been applied for simultaneous determination of Cd(II) and Hg(II) in synthetic samples, spiked water samples, tobacco, tomato, spinach and powdered milk.