Determination of trace elements in sea water by graphite-furnace atomic absorption spectrometry after preconcentration by tetrahydroborate reductive precipitation
作者： S. Nakashima , R.E. Sturgeon , S.N. Willie , S.S. Berman
DOI: 10.1016/S0003-2670(00)80804-1
关键词:
摘要: A method is described for the preconcentration of 16 elements from coastal and deep ocean sea water based on their reductive precipitation by sodium tetrahydroborate. The enrichment factors obtained were sufficient to permit analysis a near-shore sea-water reference material (11 elements) an open (9 elements). Recoveries 900 ml ranged 80 107% (100-ml sample Mn) with absolute blanks between <1.0 ng (Se) 20 (Cu). Estimated detection limits varied 0.3 l −1 (Pb) 19 l−1 (As) 36-fold concentration 900-ml sample.
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