原子吸收法测定Cr和Cd的吸收波长分别是()A、228.8nm,253.7nmB、228.8nm,357.9nmC、357.9nm,228.8nmD、357.9nm,253.7nmE、357.9nm,283.3nm
原子吸收法测定Cr和Cd的吸收波长分别是()
- A、228.8nm,253.7nm
- B、228.8nm,357.9nm
- C、357.9nm,228.8nm
- D、357.9nm,253.7nm
- E、357.9nm,283.3nm
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火焰原子吸收法测定铅的原理,以下叙述哪个是不正确的A、样品经预处理使铅以离子状态存在B、试液中铅离子被火焰的高温变成基态原子C、基态原子吸收来自铅空心阴极灯发出的共振线D、空心阴极灯发出波长为228.8nm的共振线E、对共振线的吸收值与样品中铅含量成正比
用原子吸收分光光度法测定汞和镉,其吸收波长分别是A、253.7nm和228.8nmB、228.8nm和253.7nmC、357.9nm和253.7nmD、253.7nm和357.9nmE、357.9nm和228.8nm
汞的测定原理是基于基态汞蒸气对以下波长的电磁波的吸收( )。A、波长217.3nm的吸收B、波长228.8nm的吸收C、波长253.7nm的吸收D、对波长283.3nm的吸收E、对波长238.3nm的吸收
原子吸收分光光度法测定空气中Pb、Cr、ca、Hg,使用的波长(nm)分别是A.283.3,357.9,228.8,253.7B.283.3,253.7,228.8,357.9C.357.9,253.7,228.8,283.3D.228.8,283.3,253.7,357.9E.357.9,253.7,228.8,283.3
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是A.283.3nm,357.9nm,228.8nm,253.7nmB.283.3nm,253.7nm,228.8nm,357.9nmC.357.9nm,253.7nrn,228.8nrn,283.3nmD.228.8nm,283.3nm,253.7nm,357.9nmE.357.9nm,253.7nm,228.8nm,283.3nm
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg,使用的波长(nm)分别是()。A、283.3,357.9,228.8,253.7B、283.3,253.7,228.8,357.9C、357.9,253.7,228.8,283.3D、228.8,283.3,253.7,357.9E、357.9,253.7,228.8,283.3
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是()A、283.3nm,357.9nm,228.8nm,253.7nmB、283.3nm,253.7nm,228.8nm,357.9nmC、357.9nm,253.7nm,228.8nm,283.3nmD、228.8nm,283.3nm,253.7nm,357.9nmE、357.9nm,253.7nm,283.3nm,228.8nm
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是()A、283.3nm357.9nm228.8nm253.7nmB、357.9nm253.7nm228.8nm283.3nmC、253.7nm357.9nm228.8nm283.3nmD、283.3nm253.7nm228.8nm357.9nmE、228.8nm283.3nm253.7nm357.9nm
原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长(nm)分别是()。A、283.3,57.9,228.8,253.7B、283.3,253.7,228.8,357.9C、357.9,253.7,228.8,283.3D、228.8,283.3,253.7,357.9E、357.9,253.7,228.8,283.3
单选题原子吸收法测定Cr和Cd的吸收波长分别是()A228.8nm,253.7nmB228.8nm,357.9nmC357.9nm,228.8nmD357.9nm,253.7nmE357.9nm,283.3nm
单选题原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg,使用的波长(nm)分别是()。A283.3,357.9,228.8,253.7B283.3,253.7,228.8,357.9C357.9,253.7,228.8,283.3D228.8,283.3,253.7,357.9E357.9,253.7,228.8,283.3
单选题汞的测定原理是基于基态汞蒸气对以下波长的电磁波的吸收()。A波长217.3nm的吸收B波长228.8nm的吸收C波长253.7nm的吸收D对波长283.3nm的吸收E对波长238.3nm的吸收
单选题原子吸收分光光度法测定空气中Pb、Cr、Cd、Hg的分析线波长分别是( )。A357.9nm,253.7nm,228.8nm,283.3nmB228.8nm,283.3nm,253.7nm,357.9nmC283.3nm,253.7nm,228.8nm,357.9nmD283.3nm,357.9nm,228.8nm,253.7nmE357.9nm,253.7nm,283.3nm,228.8nm
单选题原子吸收分光光度法测定空气中Cd时,波长应选择()A228.8nmB560.2nmC253.7nmD423.1nmE357.9nm