Dear Sir,
 
For Chemistry project-Maggi, I need following (with chemical reaction) confirmation test:-
 
1. Identification test for Monosodium Gultamate.
2. ..............................Disodium Guanylate.
3. ............................. Disodium Inosinate.
4. Presence of Wax.
5. Presence of excess Lead.
6. How to test excess nacl in maggi.
7. leaching of dioxins & plasticisers from maggi plastic cups on adding hot water .
 
 
Regards,
 
Akshiet Kutiyal

Asked by Akshiet kutiyal | 22nd Jun, 2015, 05:01: PM

Expert Answer:

Dear rskutiyal@yahoo.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

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Identification test for Monosodium Glutamate:

Test: Dissolve 250 mg of sample (accurately weighed), in 100 ml of glacial acetic acid. Add few drops of water which will enhance the dissolution. Titrate it with 0.1 N perchloric acid in glacial acetic acid and determine the end point potentiometrically. Run a blank determination in the same manner and correct for the blank.

 

Each ml of 0.1 N perchloric acid is equivalent to 9.356 mg of C5H8NNaO4.H2O

 

Identification test for Disodium Guanylate:

Test: Dissolve 500 mg of sample (accurately weighed) in 1000 ml volumetric flask in 0.01 N HCl and dilute to volume with 0.01 N HCl. Mix it properly. Transfer 10 ml of this solution to 250 ml volumetric flask and dilute to volume with 0.01 N HCl. Test this solution on spectrophotometer. It shows maximum absorbance at 256 2 nm. (Use Disodium Guanylate as reference standard)

 

Identification test for Disodium Inosinate:

Test: Dissolve 500 mg of sample (accurately weighed) in 1000 ml volumetric flask in 0.01 N HCl and dilute to volume with 0.01 N HCl. Mix it properly. Transfer 10 ml of this solution to 250 ml volumetric flask and dilute to volume with 0.01 N HCl. Test this solution on spectrophotometer. It shows maximum absorbance at 250 2 nm. (Use Disodium Inosinate as reference standard)

 

Presence of wax:

Please mention the type of wax as there are different types of wax used in the food materials. Please mention the type of wax as different analysis test are there for different types of wax.

 

Presence of excess lead:

If you add concentrated hydrochloric acid to excess, the lead(II) chloride precipitate will dissolve again. Complex ions like PbCl4 2- are produced, and these are soluble in water.

 

Presence of excess sodium chloride:  

It is done by following methods:

Mohr titration method

Volhard titration method

Dichromat analyser

Quntab strip test

 

Leaching of dioxins & plasticisers from maggi plastic cups on adding hot water:

Please provide more details.

 
 
 
 
Regards

Topperlearning Team.

Answered by Arvind Diwale | 23rd Jun, 2015, 01:38: PM