Vitamin C in Juices - Revision history

Mjeppesen at 18:48, 27 March 2024

2024-03-27T18:48:23Z

← Older revision		Revision as of 18:48, 27 March 2024
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	[[Category:~~Maxey~~ Demos]]		[[Category:Demos]]

	=Experimental outline=		=Experimental outline=

Bozhang: /* Materials */

2012-12-23T03:02:23Z

Materials

← Older revision		Revision as of 03:02, 23 December 2012
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	#Vitamin C Standard solution (1 mg/mL)(use 1.00 mL per experiment)		#Vitamin C Standard solution (1 mg/mL)(use 1.00 mL per experiment)
	#Starch solution (sue 1.00 mL per experiment and control for 2.00 mL total)		#Starch solution (sue 1.00 mL per experiment and control for 2.00 mL total)
	#Iodine solution (we actually make I3 - ; need up to 1.00 mL per experiment, so need 2.00 L)		#Iodine solution (we actually make I<sup>3-</sup>; need up to 1.00 mL per experiment, so need 2.00 L)

	=Procedure for fruit juice or drink=		=Procedure for fruit juice or drink=

Bozhang at 06:35, 22 December 2012

2012-12-22T06:35:12Z

Teklab at 02:53, 16 August 2012

2012-08-16T02:53:36Z

← Older revision		Revision as of 02:53, 16 August 2012
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	[[Category:Maxey Demos]]		[[Category:Maxey Demos]]

	==~~Set~~-Up==		==Experimentation with Vitamin C==
			Determine the Vitamin C content in various freshly squeezed fruit juices. Compare kiwis and oranges (really high) to peaches or apples (really low). Or, blend a vegetable in water to create a solution that can be tested. You will want to use cheesecloth to remove the fiber from the solution. Fiber is a good for you too by the way. Bell peppers are particularly high in Vitamin C but the green ones are supposed to have higher content than the red or orange ones. The Natural Hub has we page that lists the Vitamin C content of many fruits at: http://www.naturalhub.com/natural_food_guide_fruit_vitamin_c.htm

			===Materials===

			#Fruit juices and fruit drinks containing vitamin C (use 1.00 mL per experiment)
			#Vitamin C Standard solution (1 mg/mL)(use 1.00 mL per experiment)
			#Starch solution (sue 1.00 mL per experiment and control for 2.00 mL total)
			#Iodine solution (we actually make I3 - ; need up to 1.00 mL per experiment, so need 2.00 L)

			===Procedure for fruit juice or drink===

			#Carefully squirt 1.0 mL of fruit juice or drink into a 10-mL graduate cylinder
			#Carefully squirt 1.0 mL of starch solution in to the same 10-mL graduated cylinder
			#Empty the contents of the cylinder into a small Erlenmeyer flask.
			#Use a pipet bulb to add the iodine solution.
			;Count the number of drops it takes to form a purple color. :Swirl the flask to make sure the solution stays purple. If it doesn’t, add one more drop.
			#Report your number of drops to the assistant.
			#Repeat the procedure with the vitamin C standard

			===Procedure for vitamin C standard===

			#Carefully squirt 1.0 mL of vitamin C standard into a 10-mL graduated cylinder
			#Carefully squirt 1.0 mL of starch solution into the same 10-mL graduated cylinder
			#Empty the contents of the cylinder into a small Erlenmeyer flask.
			#Use a pipet bulb to add the iodine solution.
			;Count the number of drops it takes to form a purple color. :Swirl the flask to make sure the solution stays purple. If it doesn’t, add one more drop.
			#Report your number of drops to the assistant.
			#You can calculate the mg vitamin C from the following equation:
			;(number of drops to fruit juice) / (number of drops to Vitamin C standard), recorded in mg.

			The equation above has been simplified from this equation
			Estimated Vitamin C content = (1 mL) x (1mg/mL) x (number of drops to fruit juice) / (number of drops to Vitamin C standard)

Wiki Administrator: 1 revision

2012-03-13T00:04:02Z

1 revision

← Older revision	Revision as of 00:04, 13 March 2012
(No difference)

Copeland at 22:28, 15 June 2011

2011-06-15T22:28:06Z

New page

[[Category:Maxey Demos]]

==Set-Up==

← Older revision		Revision as of 06:35, 22 December 2012
Line 1:		Line 1:
	[[Category:Maxey Demos]]		[[Category:Maxey Demos]]

	==~~Experimentation with Vitamin C==~~		=Experimental outline=
	Determine the Vitamin C content in various freshly squeezed fruit juices. Compare kiwis and oranges (really high) to peaches or apples (really low). Or, blend a vegetable in water to create a solution that can be tested. You will want to use cheesecloth to remove the fiber from the solution. Fiber is a good for you too by the way. Bell peppers are particularly high in Vitamin C but the green ones are supposed to have higher content than the red or orange ones. The Natural Hub has we page that lists the Vitamin C content of many fruits at: http://www.naturalhub.com/natural_food_guide_fruit_vitamin_c.htm

	===Materials===		Determine the Vitamin C content in various freshly squeezed fruit juices. Compare kiwis and oranges (high concentration of Vitamin C) to peaches or apples (low concentration of Vitamin C). Or, blend a vegetable in water to create a solution that can be tested. Use cheesecloth or fiber to remove the fiber from the solution. Bell peppers are particularly high in Vitamin C but the green ones are supposed to have higher content than the red or orange ones. The Natural Hub has we page that lists the Vitamin C content of many fruits at: http://www.naturalhub.com/natural_food_guide_fruit_vitamin_c.htm

			=Materials=

	#Fruit juices and fruit drinks containing vitamin C (use 1.00 mL per experiment)		#Fruit juices and fruit drinks containing vitamin C (use 1.00 mL per experiment)
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	#Iodine solution (we actually make I3 - ; need up to 1.00 mL per experiment, so need 2.00 L)		#Iodine solution (we actually make I3 - ; need up to 1.00 mL per experiment, so need 2.00 L)

	===Procedure for fruit juice or drink===		=Procedure for fruit juice or drink=

	#Carefully squirt 1.0 mL of fruit juice or drink into a 10-mL graduate cylinder		#Carefully squirt 1.0 mL of fruit juice or drink into a 10 mL graduate cylinder
	#Carefully squirt 1.0 mL of starch solution in to the same 10-mL graduated cylinder		#Carefully squirt 1.0 mL of starch solution in to the same 10 mL graduated cylinder
	#Empty the contents of the cylinder into a small Erlenmeyer flask.		#Empty the contents of the cylinder into a small Erlenmeyer flask.
	#Use a pipet bulb to add the iodine solution.		#Use a pipet bulb to add the iodine solution.
	;Count the number of drops it takes to form a purple color. :Swirl the flask to make sure the solution stays purple. If it doesn’t, add one more drop.		;Count the number of drops it takes to form a purple color.
			Swirl the flask to make sure the solution stays purple. If it doesn’t, add one more drop.
	#Report your number of drops to the assistant.		#Report your number of drops to the assistant.
	#Repeat the procedure with the vitamin C standard		#Repeat the procedure with the vitamin C standard

	===Procedure for vitamin C standard===		=Procedure for vitamin C standard=

	#Carefully squirt 1.0 mL of vitamin C standard into a 10-mL graduated cylinder		#Carefully squirt 1.0 mL of vitamin C standard into a 10 mL graduated cylinder
	#Carefully squirt 1.0 mL of starch solution into the same 10-mL graduated cylinder		#Carefully squirt 1.0 mL of starch solution into the same 10 mL graduated cylinder
	#Empty the contents of the cylinder into a small Erlenmeyer flask.		#Empty the contents of the cylinder into a small Erlenmeyer flask.
	#Use a pipet bulb to add the iodine solution.		#Use a pipet bulb to add the iodine solution.
	;Count the number of drops it takes to form a purple color. :Swirl the flask to make sure the solution stays purple. If it doesn’t, add one more drop.		;Count the number of drops it takes to form a purple color.
			Swirl the flask to make sure the solution stays purple. If it doesn’t, add one more drop.
	#Report your number of drops to the assistant.		#Report your number of drops to the assistant.
	#You can calculate the mg vitamin C from the following equation:		#You can calculate the mg vitamin C from the following equation:
	;(number of drops to fruit juice) / (number of drops to Vitamin C standard)~~, recorded in mg.~~		;Amount of Vitamin C (mg)=(number of drops to fruit juice) / (number of drops to Vitamin C standard)

	The equation above has been simplified from this equation		The equation above has been simplified from this equation
	Estimated Vitamin C content = (1 mL) x (1mg/mL) x (number of drops to fruit juice) / (number of drops to Vitamin C standard)		Estimated Vitamin C content = (1 mL) x (1mg/mL) x (number of drops to fruit juice) / (number of drops to Vitamin C standard)