testing foods for sugar
testing foods for sugar
We have been using both bromothymol blue and tes-tape for sugar detection in various foods. Our supply of tes-tape has run out and the previous supplier no longer stocks it, only strips that have a small amount of testing paper on the end and these are expensive. The tes-tape is 400cm of continuous testing paper that can be cut into tiny bits for student use. It is made by a US company called "Lilly". It is easy for the kids to use and doesn't require heating as the bromothymol blue does. Does anyone know where I can get some more Tes-tape from?
Testing Sugar
Hello,
Look into getting glucose strips from chemists. Not TOO expensive, you can even ask for out of date stock which will identify the presence of glucose, but not accurectly the level.
Regards
Michelle
Look into getting glucose strips from chemists. Not TOO expensive, you can even ask for out of date stock which will identify the presence of glucose, but not accurectly the level.
Regards
Michelle
testing foods for sugar
Hi Jen,
the writing was on the wall for us years ago regarding the supply of rolls of test tape for sugar detection. We had to move to Clinistix for glucose detection from Southern Biological, 03 9877 4597. It comes in packs of 50 strips. Code: G10.39; $14.80/100.
Regards,
~Robyn
the writing was on the wall for us years ago regarding the supply of rolls of test tape for sugar detection. We had to move to Clinistix for glucose detection from Southern Biological, 03 9877 4597. It comes in packs of 50 strips. Code: G10.39; $14.80/100.
Regards,
~Robyn
Jen
You can also use Benedict's Solution it only looking for the presents (not being quantative) of Glucose. It can be bought or you can make it your self very cheaply:
17.3g Copper Sulphate (hydrated)
100g Sodium Carbonate (anhydrous)
173g Sodium Citrate (hydrated)
1L Distilled Water
Disolve the Sodium Carbonate and Citrate in 750mls warm water and filter.
Disolve Copper Sulphate in approx 100mls cold water.
Pour the Citrate-Carbonate solution into a large beaker and add the Copper Sulphate slowly with constant stirring.
Make up to 1L.
to use:
take 1ml Benedict's soluto to 5 ml test solution and heat.
If Glucose is present the solution turns Orange in colour.
For those who have the "The Laboratory" A Sience Reference & Preparation Manual its on Page 113 in my version.
Kim
You can also use Benedict's Solution it only looking for the presents (not being quantative) of Glucose. It can be bought or you can make it your self very cheaply:
17.3g Copper Sulphate (hydrated)
100g Sodium Carbonate (anhydrous)
173g Sodium Citrate (hydrated)
1L Distilled Water
Disolve the Sodium Carbonate and Citrate in 750mls warm water and filter.
Disolve Copper Sulphate in approx 100mls cold water.
Pour the Citrate-Carbonate solution into a large beaker and add the Copper Sulphate slowly with constant stirring.
Make up to 1L.
to use:
take 1ml Benedict's soluto to 5 ml test solution and heat.
If Glucose is present the solution turns Orange in colour.
For those who have the "The Laboratory" A Sience Reference & Preparation Manual its on Page 113 in my version.
Kim
Oops!!! Sorry Kim, I did mean Benedicts, not bromothymol blue. Brain hasn't kicked into gear yet, still in holiday mode!! 
Testing sugar
From what I understand Tes- tape isn't manufactured anymore. We also use Clinistix or Uristix, also available from Sthn Bio.
Uristix have 2 pads - one for protein & the other for glucose which we use when the students are doing food tests.They work well & it saves having to use Biuret.
Uristix have 2 pads - one for protein & the other for glucose which we use when the students are doing food tests.They work well & it saves having to use Biuret.
