During the course of the north sumatra project (NSP), three quality control reference materials were used GS-1.GS-2,GS-3. The samples were made by collecting a local (lembang) pozzolona derived from andesite to give the low level control sample GS-1. Porions of this material were then spiked with natural minerals to provide GS-2 (AAS high level stan…
The Following methoda of analysis are aplicable to the determination of trace amounts of elements important in the geochemical survey of Southern Sumatra. The methods are applicateble to all waters, stream sediments,soils and in some casses rocks and panned concentrates.