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
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
283.3,357.9,228.8,253.7
B
283.3,253.7,228.8,357.9
C
357.9,253.7,228.8,283.3
D
228.8,283.3,253.7,357.9
E
357.9,253.7,228.8,283.3
参考解析
解析:
汞原子蒸气对253.7nm的紫外光有强烈吸收,排除可得。
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