How to get analytical wavelength with absorbance

Question

Help with calculating the Analytical Wavelength, nm, of ff. Please show solution. Thank you!

I. Analytical Wavelength Determination

Wavelength (nm)---- Absorbance

400 --------------------------0.125

410-------------------------- 0.11

420 --------------------------0.078

430-------------------------- 0.041

440 --------------------------0.019

450 --------------------------0.008

460 --------------------------0.002

470 --------------------------0

480 --------------------------0

490 --------------------------0.001

500 --------------------------0.002

510 --------------------------0.008

520-------------------------- 0.013

530 --------------------------0.027

540-------------------------- 0.039

550 --------------------------0.066

560 --------------------------0.118

570-------------------------- 0.209

580 --------------------------0.31

590 --------------------------0.396

600 --------------------------0.504

610 --------------------------0.684

620 --------------------------0.887

630 --------------------------0.975

640 --------------------------0.86

650 --------------------------0.598

660 --------------------------0.329

670 --------------------------0.143

680-------------------------- 0.05

Answer 1

Not sure what ff means in your question, but the analytical wavelength would be found by plotting the absorbance (x) as a function of wavelength (y) and finding the peak(s). Looks like it would be around 630 nm.