Hey! Sign in to get help with your study questionsNew here? Join for free to post

Determination of the amount of creatinine in urine

Announcements Posted on
Why bother with a post grad course - waste of time? 17-10-2016
    • Thread Starter

    Hello people,
    I was doing laboratory work on determination of creatinine and had couple of problems. I will list the question and all the details, If you know the answer, please do not hesitate and comment. Thanks in advance!

    It is basically the simple maths question. However, I cannot solve it, or I'm exhausted.

    Question: Calculate the amount of creatinine in daily urine. Is it in normal range?

    Mw(creatinine) = 113.12 g/mol

    Normal amount of creatinine:
    Men 8.8-17.7 mM/24h (if 2000 ml urine)
    Women 5.3-13.3 mM/24h (if 2000 ml urine)

    Results: Light absorbtion = 0.353, so using the graph I got, concentration of creatinine 0.014 mg/0.3ml

    So the question asks if its in the normal range, I know that it is just mixing numbers and getting it in correct units, but I do not know how.. Any help would be appreciated. All I can think of is 2000/0.3 x 0.014 = 93.33 mg/2000ml so 46.65 mg/L. And now is the question how to get mg/L to mM/2000ml and how to use 113.12 g/mol..
    I know its simple question, but any quick and simple answer will help me!

Write a reply…


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: October 10, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Would you want to know what your pet is thinking about you?

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

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