Turn on thread page Beta
    • Thread Starter
    Offline

    2
    ReputationRep:
    Hi,

    I need some help on this type of question. How would I calculate this ?

    If the absorbance at 540 nm of a sample of blood diluted 201 times in Drabkin's solution is 0.511 and that of a 0.572 g/L haemoglobin in Drabkin's solution is 0.325, what is the haemoglobin concentration of the blood sample in g/L?
    (the answer should be to one decimal place)

    I tried to work this out twice using the hb concentration formula which is absorbance of test*concentration of ref. prep. *dilution of blood/absorbance of ref. prep.

    but the answers I got was incorrect, and I cant tell where i am going wrong so can someone please have a look at this.

    Thanks
    • Study Helper
    Offline

    15
    Study Helper
    (Original post by Gamewizard)
    ...
    I don't know anything about this, but just plugging those figures into the equation you give, I get 180.8 to 1 dp.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by ghostwalker)
    I don't know anything about this, but just plugging those figures into the equation you give, I get 180.8 to 1 dp.
    Oh okay, i got the same answer too, but i rounded it up to 181 and maybe thats the problem, i will try putting this answer now.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 20, 2011
Poll
Could you cope without Wifi?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.