All Science Fair Projects  

Science Project Forum

   
Welcome to the Mad Scientist's Forum! Join thousands of other students who've received help from the Mad Scientist and our science Mentors!
Register first, then post your questions below. Registration takes only 1 minute! Meet the Mad Scientist
Lost your
password?
Go Back   All Science Fair Projects > Get Help for Your Grade 9-12 Science Fair Projects > Food Science (Grades 9-12)
User Name
Password

Reply  
 
Thread Tools Display Modes
  #1  
Old 12-04-2005, 04:38 PM
Speed Speed is offline
Junior Member
 
Join Date: Dec 2005
Posts: 1
Rep Power: 0
Speed is helpful, nice and has lots of friends here
Default Where to get Vitamin C Indicator Solution

One of the projects here at all-science-fair-projects, is requiring a Vitamin C Indicator Solution(as stated in the materials and procedures). The link to the project can be found [URL=http://www.all-science-fair-projects.com/science_fair_projects/39/471/22e80fb3060d7acb5da6997b1d6fafea.html]here[/URL]

My question is:
  • Can I purchase the solution? If so which stores would have it? If it helps, I live in Los Angeles, California.
Reply With Quote
  #2  
Old 12-30-2005, 05:17 PM
boring_sister's Avatar
boring_sister boring_sister is offline
Senior Member
Expert Contributor
 
Join Date: Sep 2005
Location: Philippines
Posts: 50
Rep Power: 10
boring_sister is helpful, nice and has lots of friends here
Send a message via MSN to boring_sister Send a message via Yahoo to boring_sister
Post actually you can make it yourself

i found how to prepare one on the same site where you found the project

Directions for the preparation of vitamin C Indicators
Starch-Iodine

* Add 2 g of corn starch or potato starch in 200 mL of cold, distilled water. Bring the mixture to a full boil in a glass beaker.
* To 1 liter of water, add 8 mL of the starch solution and 1 mL of tincture of iodine.
* Note: The color of the starch indicator should be a royal blue. Just before doing the lab, check the indicator and dilute the concentration so that a workable number of drops of fresh orange juice (5 to 25) turn the indicator colorless.

Tincture of Iodine

* Add 2 g of Iodine to 45 mL of ethanol and dissolve.
* Dissolve this mixture in 55 mL of distilled water.
* Add 2.4 grams of KI to this mixture and dissolve.

Indophenol

* Stock solution : dissolve 100 mg of 2,6 dichloro-indophenol salt in 100 mL of distilled water.
* Prepare a working solution by diluting the stock solution at a 1:10 ration with distilled water.
* Note: When testing the juices of citrus fruits for vitamin C content, the blue indophenol may turn pink before turning colorless because of the presence of substances other than vitamin C.

good huh
__________________
"Oh how wrong we were to think that immortality meant never dying."
Reply With Quote
  #3  
Old 01-03-2006, 05:28 PM
power kitten power kitten is offline
Junior Member
 
Join Date: Jan 2006
Posts: 7
Rep Power: 9
power kitten is helpful, nice and has lots of friends here
Smile vitamin c

Ive done this beffore...
This is what you do...
you corn starch in cold water,boil it, and add iodine.
it should be like a blue color.......
then you put it in juce and watch the color change.
Have Fuun.
Reply With Quote
  #4  
Old 10-19-2008, 08:15 AM
isafr2 isafr2 is offline
Junior Member
 
Join Date: Oct 2008
Posts: 1
Rep Power: 0
isafr2 is helpful, nice and has lots of friends here
Default

Quote:
Originally Posted by boring_sister View Post
i found how to prepare one on the same site where you found the project

directions for the preparation of vitamin c indicators
starch-iodine

* add 2 g of corn starch or potato starch in 200 ml of cold, distilled water. Bring the mixture to a full boil in a glass beaker.
* to 1 liter of water, add 8 ml of the starch solution and 1 ml of tincture of iodine.
* note: The color of the starch indicator should be a royal blue. Just before doing the lab, check the indicator and dilute the concentration so that a workable number of drops of fresh orange juice (5 to 25) turn the indicator colorless.

Tincture of iodine

* add 2 g of iodine to 45 ml of ethanol and dissolve.
* dissolve this mixture in 55 ml of distilled water.
* add 2.4 grams of ki to this mixture and dissolve.

Indophenol

* stock solution : Dissolve 100 mg of 2,6 dichloro-indophenol salt in 100 ml of distilled water.
* prepare a working solution by diluting the stock solution at a 1:10 ration with distilled water.
* note: When testing the juices of citrus fruits for vitamin c content, the blue indophenol may turn pink before turning colorless because of the presence of substances other than vitamin c.

Good huh
the more drops the more vitamin c
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Effect of Aspirin, Vitamin C, Calcium, and Benadryl on the growth of plants. dreamyblue001 Biology (Grades 9-12) 0 10-16-2008 07:22 AM
testing the amount of vitamin C karla jeene Food Science (Grades 6-8) 0 09-06-2006 03:36 PM
Vitamin C vitaminc07 Food Science (Grades 9-12) 21 04-14-2006 12:51 PM
I need help on coming up with ideas for my science fair project on testing vitamin C bigshay456 Food Science (Grades 9-12) 1 02-03-2006 12:49 PM
Science Fair Project brownchick13 Food Science (Grades 6-8) 8 01-03-2006 07:41 AM


All times are GMT -8. The time now is 11:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright (C) 2006 All Science Fair Projects.com All Rights Reserved