Question

7. A standard calibration curve for diphenhydramine in water was obtained by UV-Vis. The
resulting best-fit line was found to be:
Abs = (0.250 0.02 AU mM diphenhydramine] + (0.0011 +0.002 AU).
What is the limit of quantitation for this method?
a. 0.020 mm
b. 0.0044 mm
c. 0.250 mm
d. 227 mm
e. 0.076 mm​

Answer 1

the answer is option d because of the law of conservation of matter

Answer 2

Given:

Abs = (0.250 ± 0.02 AU mM⁻¹)[diphenhydramine] + (0.0011 ± 0.002 AU)

To find:

What is the limit of quantitation for this method?

Solution:

Limit of a calculation is the smallest value that can be detected with acceptable precision and accuracy.

So, here in this case it is 0.250 mM

So, the correct option is (c) 0.250 mM