The Perkin–Elmer 5100 Zeeman atomic absorption spectrometer and HGA-5100 graphite furnace with pyrolytically coated graphite tubes of the standard type non-platform and AS-90 autosampler were used in Cu, Cr, and Mn determinations
The Perkin–Elmer 5100 Zeeman atomic absorptionspectrometer and HGA-5100 graphite furnace with pyrolytically coated graphite tubes of the standardtype non-platform and AS-90 autosampler were used in Cu, Cr, and Mn determinations