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紫外--可见分光光度计·知识测评

1. 【单选】朗伯比尔定律：（）

A. Absorbance is proportional to both the path length and concentration of the absorbing species

B. Absorbance is proportional to the log of the concentration of the absorbing species

C. Absorbance is equal to I0 /I

2. 【单选】Which of the following components of a monochromator is the dispersing element?（）

A. The collimating lens

B. The entrance slit

C. The diffraction grating

3. 【单选】Why must the voltage supplied to a tungsten lamp be very stable?（）

A. Because if it wasn't the lamp would burn out

B. Because amount of energy the lamp emits is proportional to the fourth power of the operating voltage

C. Because the lamp will only function at a specific voltage

4. 【单选】测定紫外光区吸收选择什么材质的比色池？（）

A. 玻璃

B. 石英

5. 【单选】线性二极管阵列检测器只能检测单一波长吸收。（）

A. 正确

B. 错误