誘導結合プラズマ発光分析法によるホウ素を含む合金分析のための溶液化

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This paper presents dissolution methods of several B-containing alloys to determine the amounts of B accurately by ICP-OES. It should be principally noted that boron is easily volatilized when the samples are dissolved in acid solutions, which may cause a serious error of the analytical result. Fe-B, Mn-Al-B, and Al-Pd-Mn-B alloy samples (30 mg) were dissolved in TEFE beakers by heating in 25 ml of an acid mixture: H_3PO_4 : HNO_3 : HCl : H_2O=1 : 2 : 2 : 5. A Nd-Fe-B- Si alloy sample (100 mg) was dissolved in a TEFE beaker by heating in 30 ml of an acid mixture: H_3PO_4 : HNO_3 : HCl : H_2O = 1 : 2 : 2 : 5 and 4 ml of NaOH solution (8 mg/ml). The NaOH addition can prevent Si in the solution from precipitating because silicic acid can be dissolved in alkaline solutions. An Fe-Co-Nd-B alloy sample (30 mg) was dissolved in a TEFE beaker by heating in 30 ml of an acid mixture: HNO_3 : guliceline : H_2O=15 : 0.3 : 14.7. A Nb-B alloy sample (100 mg) was dissolved in a polypropylene flask in 30 ml of HNO_3 (1+1) and 2 ml of HF at room temperature. An Fe-Zr-Co-Ni-B sample (50 mg) was dissolved in a polypropylene flask in 35 ml of an acid mixture: HNO_3 : HF : guliceline : H_2O=15 : 2 : 0.1 : 17.9 at room temperature. Ni-Al-Hf-B and Ni-Al-Ta-B alloy samples (40 mg) were dissolved in a TEFE beaker by heating in 35 ml of an acid mixture: HNO3 : HF : H2O=15 : 2 : 18 and 5 ml of mannitol (1 w/v%).
2004-07-05