16
3.3.2 Porewater.
pH was measured with a pH meter. Conductivity was analyzed with a WTW (LF 191)
conductivity meter. Alkalinity was determined by titration with 0.036 N H2SO 4.
NI-I4 + was measured at 655 nm wavelength by a Spectrophotometer, model
Spectronic 1201.
Dissolved Cd, Zn, Pb, Cu, Cr, and Co were analyzed using a Perkin Elmer HGA
500 graphite furnace. Fe, Mn, Ca, and Mg were determined by Flame-AAS, Model
Perkin Elmer 3030. The precision of the metal analyses based on replicate samples
was 10 % for~e, Mn, Cu, and Zn; 15 % for Co, Cr, Cd and Pb.
NO3", SO4 ", CI', Br" were analysed by a Diofiex 4000i Ionchromatograph.
3.3.2 Porewater.
pH was measured with a pH meter. Conductivity was analyzed with a WTW (LF 191)
conductivity meter. Alkalinity was determined by titration with 0.036 N H2SO 4.
NI-I4 + was measured at 655 nm wavelength by a Spectrophotometer, model
Spectronic 1201.
Dissolved Cd, Zn, Pb, Cu, Cr, and Co were analyzed using a Perkin Elmer HGA
500 graphite furnace. Fe, Mn, Ca, and Mg were determined by Flame-AAS, Model
Perkin Elmer 3030. The precision of the metal analyses based on replicate samples
was 10 % for~e, Mn, Cu, and Zn; 15 % for Co, Cr, Cd and Pb.
NO3", SO4 ", CI', Br" were analysed by a Diofiex 4000i Ionchromatograph.