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| Winemaking (rec.crafts.winemaking) Discussion of the process, recipes, tips, techniques and general exchange of lore on the process, methods and history of wine making. Includes traditional grape wines, sparkling wines & champagnes. |
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19-09-2007, 08:56 PM
posted to rec.crafts.winemaking
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sulfite test kit help needed
I bought one of those titrets kits. After it turns dark blue i
continue to add juice as directed and can never get it back to the original color - as directed. The color change I do get is so gradual that it is hard to determine an end point. It is definitely not as easy as a titration. please help. marc 
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20-09-2007, 02:30 PM
posted to rec.crafts.winemaking
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sulfite test kit help needed
I can't help you with Titrets but I'll volunteer that I now use the
Accuvin free SO2 tests. They are easy and work with both red and white wines. I found Titretes too difficult to use for reds. The Accuvin kits only have a 4 month shelf life so if you buy them make sure you're getting a fresh one. RD
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20-09-2007, 09:01 PM
posted to rec.crafts.winemaking
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sulfite test kit help needed
wrote in message ups.com... I bought one of those titrets kits. After it turns dark blue i continue to add juice as directed and can never get it back to the original color - as directed. The color change I do get is so gradual that it is hard to determine an end point. It is definitely not as easy as a titration. please help. marc If the color is remaining blue-ish and you've added wine/must to the ampule beyond where it would read 20ppm, you don't have adequate sulfite in the wine/must. Add some as appropriate to the volume you're dealing with and re-test. I've found that even with darkly colored wines like blackberry I can see the endpoint, You're looking for the color to return to that of the liquid being tested. Cal
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23-09-2007, 05:42 PM
posted to rec.crafts.winemaking
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sulfite test kit help needed
On Sep 19, 11:56 am, wrote:
I bought one of those titrets kits. After it turns dark blue i continue to add juice as directed and can never get it back to the original color - as directed. The color change I do get is so gradual that it is hard to determine an end point. It is definitely not as easy as a titration. please help. marc You must let it rest for about 30 seconds if you aren't sure. If you go too fast you'll get a false reading. I assume you're doing red wines? White wines are very easily seen... and if yours never change back you may have the wrong sulfite test kit. They make some that go up to 500ppm- you want the one that goes 0-100ppm. try taking a spent sulfite test and stirring in some sulfite... see if that gets it clear for you.
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