試題詳解

19. The calibration curve equation for quantifying standard was I = 51.00 x [ ] + 1.00, where I is the intensity and the   concentration is in micromole/L. The reagent blank, measured by three repeated experiments, gave a value of 0.30± 0.04. What is the detection limit for Cu2t based on a signal-to-noise ratio of 2?
(A) 1.56 nM.
(B) 1.35 nM.
(C) 2.56 nM.
(D) 2.35 nM.