Determining Trace Iron Element in Pure Quartz by Using Extraction-Atomic Absorption Spectrophotometry
li mao-ju~1; wang ji-wei~2; sun ji-nan~3(1.shandong institute and laboratory of geological sciences; shandong jinan 250013; china; 2.jinan welcome biochemical pharmaceutical corporation; shandong jinan 250100; china; 3.no.8 exploration institute of geology and mineral resources; shandong rizhao 276826; china)