Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
To Identify Bio chemicals in an unknown substance
Member rating:
(2 votes)
| Words:
| Submitted: Fri Jun 03 2005
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
To Identify Bio chemicals in an unknown substance Introduction The object of the experiment is to test a substance and identify the bio chemicals, which exist in that substance. Food tests are used to identify which bio chemicals exist in a substance. The substances characterised are in the tests are: carbohydrates, starch, lipids and peptide bonds. Method: The following tests were used to identify the relevant substances: Benedicts Test Carbohydrates - reducing sugars such as glucose fructose and maltose * Add 2cm3 of a solution to a test tube. * Add an equal volume of Benedicts solution. * Shake and bring gently to the boil, shaking continuously to minimise spitting. Red brown precipitate result indicates reducing sugars present Disaccharide hydrolysis test and Benedicts test Carbohydrates - non-reducing sugars such as sucrose * Add 2cm3 of solution to a test tube . * Add 1cm3 dilute hydrochloric acid. * Boil for one minute. * Carefully neutralise with sodium hydrogen carbonate *...
To see the full version of this document, and 145,348 others
