【摘要】：當(dāng)樣品中硅的質(zhì)量分?jǐn)?shù)不大于2%時(shí),采用鹽酸(1+1)溶液10mL和數(shù)滴過氧化氫溶解0.100 0g樣品;當(dāng)樣品中硅的質(zhì)量分?jǐn)?shù)大于2%時(shí),先用200g·L~(-1)氫氧化鈉溶液10mL溶解0.100 0g樣品,加入鹽酸(1+1)溶液15 mL酸化。以La 408.671nm,Ce 413.765nm,Sc 361.384nm作為分析線,采用基體匹配法來消除鋁基體干擾。鑭、鈰、鈧的線性范圍為1.0~10.0mg·L~(-1),檢出限(3s)分別為3.5,6.1,3.1μg·L~(-1)。應(yīng)用該方法分析了鑭、鈰、鈧質(zhì)量分?jǐn)?shù)在0.005 0%~0.500%內(nèi)的鋁合金樣品,鑭、鈰、鈧測(cè)定值之和與三溴偶氮胂分光光度法測(cè)得稀土元素總量相符。測(cè)定值的相對(duì)標(biāo)準(zhǔn)偏差(n=11)均小于6.0%。
[Abstract]:When the mass fraction of silicon in the sample is not more than 2, the sample is dissolved with 10mL in hydrochloric acid (11) solution and several drops of hydrogen peroxide. When the mass fraction of silicon in the sample is larger than 2, the sample is dissolved with 200 g / L ~ (-1) sodium hydroxide solution 10mL. 15 mL hydrochloric acid (11 1) solution was added. Taking La 408.671nmCe 413.765nmSc 361.384nm as the analytical line, the matrix matching method was used to eliminate the interference of aluminum matrix. The linear range of lanthanum, cerium and scandium is 1.0~10.0mg L ~ (-1), and the detection limit (3 s) is 3.1 渭 g / L ~ (-1). The determination of lanthanum, cerium and scandium in 0.005 aluminum alloy samples was analyzed by this method. The sum of the determination values of lanthanum, cerium and scandium was in agreement with the total amount of rare earth elements determined by tribromoarsenazo spectrophotometry. The relative standard deviations (nc11) of the measured values were less than 6.0.
【作者單位】： 貴州省分析測(cè)試研究院;貴州省生物研究所;
【基金】：貴州省科學(xué)技術(shù)基金項(xiàng)目(黔科合基礎(chǔ)[2016]1139);貴州省科學(xué)技術(shù)基金重點(diǎn)項(xiàng)目(黔科合JZ字[2015]2006) 貴州省科技計(jì)劃項(xiàng)目(黔科合重大專項(xiàng)字[2015]6013)
【分類號(hào)】：TG115.33;TG146.21
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本文編號(hào)：2165838