Colourimetry (testing for glucose in urine) - Biology A-level Required Practical

[@esthermazarura2255]

Love the way he causal says urine, despite that fact that he’s not wearing gloves.

[@efallon302]

Please can you make more of these videos? They are great!!

[@MalmesburyEducation]

What would you like? 😊

[@kimvale2203]

Your required practical videos are so clear and helpful, all of our students are advised to watch and learn. Great opportunity for them to learn Cornell note taking too. Are you planning on completing the set for A level BIology?

[@monkeymagic2385]

How would I test the glucose content of a solution that has a different clarity, for example, a liquid food sample? I would imagine that this colorimetry method will not work because the liquid food sample has other things in it that affect the ability of light to pass through it and therefore won't be comparable to the controls?

[@finndooley7019]

What is the dependent and independent variable?

[@MrMurrayBiology]

Bit confused by the results here. Shouldn't absorbance decrease as the glucose concentration increases (as less red light is scattered by the blue solution and the blue solution become clearer). Are you measuring absorbance of red light?

[@MalmesburyEducation]

Good question - it's something we could have been a bit clearer on. What's happening is that there is more white precipitate produced with a higher concentration of glucose - this results in an increase in absorbance.

[@Hardkasimanse]

Lovely stuff

[@miapowell7101]

thnx

[@helenakahisay8549]

King