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19 Feb 2023
•
How To Do Cool Science Tests: Glucose, Starch, and Lipids
M
Molly English
@mollyenglish_bszi
Iodine Solution Test for Starch
This page outlines the iodine solution starch test steps for detecting starch in food samples. The test is particularly useful for identifying starch in foods like pasta, rice, and potatoes. The procedure is simple and relies on the distinctive color change when iodine reacts with starch.
To conduct the iodine test for starch, follow these steps:
- Prepare a food sample and transfer 5cm³ to a test tube.
- Add a few drops of iodine solution to the test tube.
- Gently shake the tube to mix the contents thoroughly.
- Observe the color change in the solution.
Highlight: If starch is present in the sample, the color of the solution will change from browny-orange to black or blue-black.
Vocabulary: Iodine solution - A chemical reagent that turns dark blue or black in the presence of starch.
Example: When testing a sample of cooked pasta, if the iodine solution turns blue-black upon contact, it confirms the presence of starch in the pasta.
Sudan III Test for Lipids
This page describes the Sudan III lipids test method used to detect the presence of lipids in food samples. This test is particularly effective for identifying lipids in foods such as olive oil, margarine, and milk. The procedure involves using Sudan III stain solution and observing the separation of layers in the test tube.
To perform the Sudan III test for lipids, follow these steps:
- Prepare a sample of the food you're testing and transfer 5cm³ into a test tube.
- Use a pipette to add 3 drops of Sudan III Stain Solution to the test tube.
- Gently shake the tube to mix the contents.
- Observe the formation of layers in the test tube.
Highlight: If lipids are present in the sample, the mixture will separate into two distinct layers, with the top layer appearing bright red.
Vocabulary: Sudan III Stain Solution - A fat-soluble dye used to detect the presence of lipids in a sample.
Example: When testing a milk sample, if a separate bright red layer forms at the top of the liquid after adding Sudan III, it indicates the presence of lipids in the milk.
Biuret Test for Proteins
This page outlines the Biuret test procedure used to detect the presence of proteins in food samples. This test is particularly useful for identifying proteins in foods such as meat and cheese. The Biuret test relies on a color change reaction when the Biuret solution comes into contact with proteins.
To conduct the Biuret test for proteins, follow these steps:
- Prepare a sample of your food and transfer 2cm³ to a test tube.
- Add 2cm³ of Biuret solution to the sample.
- Gently shake the tube to mix the contents thoroughly.
- Observe the color change in the solution.
Highlight: If proteins are present in the food sample, the solution will change from blue to pink or purple. If no protein is present, the solution will remain blue.
Vocabulary: Biuret solution - A chemical reagent used to detect the presence of peptide bonds in proteins.
Example: When testing a sample of cheese, if the Biuret solution turns purple after mixing, it confirms the presence of proteins in the cheese.
Definition: Proteins - Large, complex molecules made up of amino acids that play crucial roles in the structure and function of cells in living organisms.
Benedict's Test for Glucose Detection
This page describes the Benedict's test procedure for glucose detection in food samples. The test is used to identify the presence of glucose in foods such as biscuits, cereal, and bread. The procedure involves preparing a food sample, using a water bath, and observing color changes in the test solution.
To perform the Benedict's test, follow these steps:
- Prepare a food sample and transfer 5cm³ into a test tube.
- Set up a water bath at 75°C.
- Add some Benedict's solution to the test tube using a pipette.
- Place the test tube in the water bath using a test tube holder for 5 minutes.
- Observe the color change in the solution.
Highlight: The color change in the test tube indicates the presence and concentration of glucose. A green or yellow color suggests low concentrations of glucose, while a brick-red color indicates high concentrations.
Vocabulary: Benedict's solution - A chemical reagent used to detect the presence of reducing sugars, such as glucose.
Example: When testing a biscuit sample, if the solution turns brick-red after heating, it indicates a high concentration of glucose in the biscuit.
Can't find what you're looking for? Explore other subjects.
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4.9/5
App Store
4.8/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
How To Do Cool Science Tests: Glucose, Starch, and Lipids
M
Molly English
@mollyenglish_bszi
This document outlines various food tests to detect the presence of specific nutrients in different food samples. It covers tests for glucose, starch, lipids, and proteins, providing step-by-step procedures for each test along with expected results. These tests are essential... Show more
Iodine Solution Test for Starch
This page outlines the iodine solution starch test steps for detecting starch in food samples. The test is particularly useful for identifying starch in foods like pasta, rice, and potatoes. The procedure is simple and relies on the distinctive color change when iodine reacts with starch.
To conduct the iodine test for starch, follow these steps:
- Prepare a food sample and transfer 5cm³ to a test tube.
- Add a few drops of iodine solution to the test tube.
- Gently shake the tube to mix the contents thoroughly.
- Observe the color change in the solution.
Highlight: If starch is present in the sample, the color of the solution will change from browny-orange to black or blue-black.
Vocabulary: Iodine solution - A chemical reagent that turns dark blue or black in the presence of starch.
Example: When testing a sample of cooked pasta, if the iodine solution turns blue-black upon contact, it confirms the presence of starch in the pasta.
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Sudan III Test for Lipids
This page describes the Sudan III lipids test method used to detect the presence of lipids in food samples. This test is particularly effective for identifying lipids in foods such as olive oil, margarine, and milk. The procedure involves using Sudan III stain solution and observing the separation of layers in the test tube.
To perform the Sudan III test for lipids, follow these steps:
- Prepare a sample of the food you're testing and transfer 5cm³ into a test tube.
- Use a pipette to add 3 drops of Sudan III Stain Solution to the test tube.
- Gently shake the tube to mix the contents.
- Observe the formation of layers in the test tube.
Highlight: If lipids are present in the sample, the mixture will separate into two distinct layers, with the top layer appearing bright red.
Vocabulary: Sudan III Stain Solution - A fat-soluble dye used to detect the presence of lipids in a sample.
Example: When testing a milk sample, if a separate bright red layer forms at the top of the liquid after adding Sudan III, it indicates the presence of lipids in the milk.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Biuret Test for Proteins
This page outlines the Biuret test procedure used to detect the presence of proteins in food samples. This test is particularly useful for identifying proteins in foods such as meat and cheese. The Biuret test relies on a color change reaction when the Biuret solution comes into contact with proteins.
To conduct the Biuret test for proteins, follow these steps:
- Prepare a sample of your food and transfer 2cm³ to a test tube.
- Add 2cm³ of Biuret solution to the sample.
- Gently shake the tube to mix the contents thoroughly.
- Observe the color change in the solution.
Highlight: If proteins are present in the food sample, the solution will change from blue to pink or purple. If no protein is present, the solution will remain blue.
Vocabulary: Biuret solution - A chemical reagent used to detect the presence of peptide bonds in proteins.
Example: When testing a sample of cheese, if the Biuret solution turns purple after mixing, it confirms the presence of proteins in the cheese.
Definition: Proteins - Large, complex molecules made up of amino acids that play crucial roles in the structure and function of cells in living organisms.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Benedict's Test for Glucose Detection
This page describes the Benedict's test procedure for glucose detection in food samples. The test is used to identify the presence of glucose in foods such as biscuits, cereal, and bread. The procedure involves preparing a food sample, using a water bath, and observing color changes in the test solution.
To perform the Benedict's test, follow these steps:
- Prepare a food sample and transfer 5cm³ into a test tube.
- Set up a water bath at 75°C.
- Add some Benedict's solution to the test tube using a pipette.
- Place the test tube in the water bath using a test tube holder for 5 minutes.
- Observe the color change in the solution.
Highlight: The color change in the test tube indicates the presence and concentration of glucose. A green or yellow color suggests low concentrations of glucose, while a brick-red color indicates high concentrations.
Vocabulary: Benedict's solution - A chemical reagent used to detect the presence of reducing sugars, such as glucose.
Example: When testing a biscuit sample, if the solution turns brick-red after heating, it indicates a high concentration of glucose in the biscuit.
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.9/5
App Store
4.8/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user