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Acid Titration Test Kit

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Wiz

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I am confused I think with this kit. Most 5 gallon recipes call for +/- 2 1/2 tsp. acid blend. I have done 5 gallon batches of blackberry, pineapple and mango. Today when I did mango, the initial test showed about .30. If you use 5.5 tsp to raise the acid up .15, you need a lot of acid blend to reach .60 although a pleasant tart taste had been reached long before the amount the test kit says is needed. I think I must be reading the results wrong. Maybe there is a better test kit out there.
 

rodo

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Is this the type of test you are using?


Syringe_Acid_Tes_4bc8c0386a5e9_90x90.gif
 

Tom

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When you add the 10cc did you only add 3cc or was it 7 cc before it changed color?
 

Wiz

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OK Tom, I think from your question that this may be the problem. Three cc's may change the color, but not permanently. I am adding the neutralizer 1 drop at a time until their is no further change. If it takes 3 cc's to permanently change the color, I am reading the acid at .30%. Am I going wrong?
 

rodo

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You must multiply the cc's of neutralizer by .075
 

Wiz

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Rodo, there is no mention of multiplying the cc's by .075 in the instructions
 

rodo

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Would you like me to go through the test step by step with you?

I made an error with this my first time too.
 

Wiz

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I've done both but let's go with todays white mango wine.
 

rodo

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With the syringe draw a 10cc sample of the wine and put it in the clear cup. Rinse the syringe several times with water.
 

Tom

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Draw 15CC of wine
Add 3 drops
Draw 10cc of Sodium Hydroxide
slowly add to color change
Now if you added 7cc then its .70%
 

rodo

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Add 3 or 4 drops of the indicator solution (phenolphthalein) to the cup and swirl to mix.
 

rodo

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Now if you added 7cc then its .70%
Tom if he is using the kit I showed him in the picture it is not 70% It is 7cc X .075 =.52%
 

Wiz

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OK, that is my understanding also. I have been doing it correctly. The problem is that I'm coming up with like .20% or .30% and it takes a ridiculous amount of acid blend to bring it up to 60%. Could the kit have problems?
 

Tom

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Its possible we have different kits. The one I use is called Acid Titration Kit from L.D.Carlson. My kit says;
"each cc of sodium hydroxide add to attain color change indicates .1% of acid If 5cc is needed to get color change the acid is .5%"
 

Wiz

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Thanks guys, I think I will order the kit that Wade recommends. This one is just not giving me results I feel comfortable with,
 

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