Analysis of Minerals in Plants by Lithium Metaborate Fusion ICP-AES

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  • メタホウ酸リチウム溶融-ICP発光分光分析法による植物の無機成分分析
  • メタホウサン リチウム ヨウユウ ICP ハッコウ ブンコウ ブンセキホウ ニ

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Abstract

A rapid plant digestion method for analysis of minerals in plants by lithium metaborate fusion ICP-AES was studied. The procedure established is summarized as follows. Weigh 0.5 g of dried plant sample in platinum crucible, and put it into muffle furnace for ashing at 500℃ 30 min. Add 1 g of lithium metaborate and mix well with the ash. Fuse the mixture in muffle furnace at 900℃ for 10 min. Dissolve the melt in 40 ml of 1 M nitric acid at 60℃. Dilute 100 ml by water, and analyze P, K, Ca, Mg, Si, Fe, Mn, Zn, Cu and Al by ICP-AES. The total time of analysis was about 90 min for digestion and about 5 min for ICP-AES measurement. The accuracy of this method was confirmed by analysis of five reference standard materials (NIES No.1, 7, NBS SRM 1572, 1573, 1575). This method is available for rapid analysis of silicon in plants, and Fe, Mn or Al in silicon-rich plants such as rice.

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