| IKI reagent (for starch) question |
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Maksim
A really tough bot, or a member.
Joined: 30 May 2006
Posts: 2
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 Posted: Tue May 30, 2006 4:42 am Post subject: IKI reagent (for starch) question |
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IKI, Iodine solution in Potasium Iodine:
How to prepare the reagent?
What are the limitations / drawbacks in its use for starch detection?
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adrian
Regular
Joined: 20 Apr 2006
Posts: 44
Location: Bucharest, Romania
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| Posted: Sun Jun 04, 2006 12:24 pm Post subject: Re: IKI reagent (for starch) question |
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| Maksim wrote: |
IKI, Iodine solution in Potasium Iodine:
How to prepare the reagent?
What are the limitations / drawbacks in its use for starch detection? |
The method is very sensitive, and the amount of iodine is quite small. Also, you can use a simply iodine solution into ethanol (the presence of KI can be explained only if you cannot use alcohol). Usually, I/KI is 1:1 (mole), in order to form KI3, a water soluble complex. If you could use alcohol solutions, even 1g I2 per litre ethanol is too much. After preparation, the reagent must be kept into a dark (brown or green) bottle.
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Maksim
A really tough bot, or a member.
Joined: 30 May 2006
Posts: 2
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| Posted: Sun Jun 04, 2006 12:36 pm Post subject: |
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 Thank you adrian
Maksim
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