原子吸光光度法及び炎光光度法による微量リチウムの定量におけるナトリウムの干渉

概要

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Interference of sodium was measured for the determination of micro quantity (2μg cm^<-3>) of lithium in the solution containing sodium nitrate or sodium chloride by atomic absprption spectrophotometry and flame photometry with air-acetylene flame. A solution containing lithium of 2 μg cm^<-3> in 0.1 M nitric acid was used as a reference solution, because the depression in nitric acid was within experimental error (<1%) in a range of (0.05〜0.5)M in the preliminary experiment for the effect on the signal of lithium in nitric, hydrochloric, and perchloric acid. For atomic absorption spectrophotometry no interference was observed in a range of (0.25〜7)μg cm^<-3> of sodium concentration, while the enhancement of (2_5) % was measured for (25〜1000)μg cm^<-3> and the increased depression at higher concentration than 1000μg cm^<-3>. Less depression was noticed in sodium nitrate solution. Similar interference was observed in the systems of the various acid and salt solutions by flame photometry.
社団法人日本分析化学会の論文
1979-11-05