Cholesterol Extraction using Soxhlet Method

[EBBAzores]

Homework Statement

During an experiment using Soxhlet Method to extract cholesterol from egg yolk, also using dicloromethane as a reagent, we crush half boiled egg yolk and put 80 cm³ of dicloromethane.

Homework Equations

Then comes a question which is assuming the maximum of absorption of the reagent-cholestrol is 550 nm, sugest a way to quantify it.

The Attempt at a Solution

I don't understand what should I answer here

 

[Borek]

As worded it doesn't make much sense. Obviously it is about measuring concentrating using visible light spectrometer.