Quantcast

My first Malolactic fermentation test

Wine Making Talk

Help Support Wine Making Talk:

BlueStimulator

Senior Member
Joined
Aug 16, 2015
Messages
353
Reaction score
213
Well I finally got the test kit with papers to see if the Malolactic Fermentation was completed. So I gave it a shot and here is how it turned out. As it was my first vintage very happy it looked complete. Some of these tests and number checks, sort of make me feel analytical but then I remember that isn't possible

image.jpg
 
Last edited:

ffemt128

Senior Member
WMT Supporter
Joined
Dec 28, 2009
Messages
5,257
Reaction score
555
Looks like you're complete to me. How long was your MLF process? I pitched MLF on my Chilean wines the beginning of May. Planning on testing end of June.
 

cmason1957

CRS Sufferer
WMT Supporter
Joined
Aug 5, 2011
Messages
4,069
Reaction score
3,299
Location
O'Fallon, MO - Just NorthWest of St. Louis, MO
I am going to throw in a somewhat negative opinion (or maybe just throw water on it, who knows). Even with that clear of a chromotography test, I would wait at least two more weeks before adding meta-bisulphite. Chromotography is only good down to about 50 ppm and you really want it to be lower than that.
 

Ajmassa

just a guy
Joined
Oct 25, 2016
Messages
3,872
Reaction score
3,582
Location
S. Jersey/Philadelphia area
I am going to throw in a somewhat negative opinion (or maybe just throw water on it, who knows). Even with that clear of a chromotography test, I would wait at least two more weeks before adding meta-bisulphite. Chromotography is only good down to about 50 ppm and you really want it to be lower than that.

What do you mean by "only good down to about 50 ppm"? I had a similar looking test about 2 weeks ago. Tested again the other day and looks about done. I still planned on waiting another couple weeks to rack and sulfite, but that's still new info to me regardless.
I tested the So2 a couple weeks ago as well and was at about 50 free ppm.
 

BlueStimulator

Senior Member
Joined
Aug 16, 2015
Messages
353
Reaction score
213
I forgot to add that I did the inoculation of the malolactic bacteria back in early winter.I was concerned since my shop is kept between 60 and 65° That maybe they didn't have a chance to finish the fermentation and wanted to make sure that it warmed up enough they could finish.
 

Stevelaz

Senior Member
Joined
Apr 12, 2016
Messages
310
Reaction score
83
I forgot to add that I did the inoculation of the malolactic bacteria back in early winter.I was concerned since my shop is kept between 60 and 65° That maybe they didn't have a chance to finish the fermentation and wanted to make sure that it warmed up enough they could finish.
What mlb strain did you use? And exactly when did you start it, what month?
Are those all red?

Your PC looks great! You got a lot of samples on there. You must have kept the samples very small! Did you fill the piplets to the line and go from there? I had a very hard time getting the samples right to the line.
 
Last edited:

BlueStimulator

Senior Member
Joined
Aug 16, 2015
Messages
353
Reaction score
213
End of Oct and as a newbie I just wrote in my notes added MLF.. Wines are 2 gal of Cab Franc. 2 gal of Petie Verdot, 3 gal of Cab Sav and 5 gal of Viognier.
 

BlueStimulator

Senior Member
Joined
Aug 16, 2015
Messages
353
Reaction score
213
Actually I'm not sure I haven't even looked at my notes if I did or did not. I was running the test and just did them all. Hey I'm a newbie and like I said this is my first vintage so I am gonna make some mistakes big and small:h:::h::
 

Johnd

Senior Member
WMT Supporter
Joined
Jun 10, 2015
Messages
6,610
Reaction score
6,499
Location
South Louisiana
Actually I'm not sure I haven't even looked at my notes if I did or did not. I was running the test and just did them all. Hey I'm a newbie and like I said this is my first vintage so I am gonna make some mistakes big and small:h:::h::
If your voignier is the "V" on your chromo test, there's no malic left in there!!!!
 

cmason1957

CRS Sufferer
WMT Supporter
Joined
Aug 5, 2011
Messages
4,069
Reaction score
3,299
Location
O'Fallon, MO - Just NorthWest of St. Louis, MO
What do you mean by "only good down to about 50 ppm"? I had a similar looking test about 2 weeks ago. Tested again the other day and looks about done. I still planned on waiting another couple weeks to rack and sulfite, but that's still new info to me regardless.
I tested the So2 a couple weeks ago as well and was at about 50 free ppm.
What I mean is that chromatography looks the same at 50 ppm as it does at nearly 0 ppm. It really isn't a quantitative test.
 

Johnd

Senior Member
WMT Supporter
Joined
Jun 10, 2015
Messages
6,610
Reaction score
6,499
Location
South Louisiana
Ok. Thanks. Is that why you prefer to use those malic test strips that actually give you the color coded shade of amount of malic remaining?
That, or give it the two weeks to make sure it's done. Judging from the length of time you allowed before your first chromo, you probably could have gotten a test result like this, but can't know for sure. I'm with cmason, give it the time and sulfite it.
 

cmason1957

CRS Sufferer
WMT Supporter
Joined
Aug 5, 2011
Messages
4,069
Reaction score
3,299
Location
O'Fallon, MO - Just NorthWest of St. Louis, MO
Ok. Thanks. Is that why you prefer to use those malic test strips that actually give you the color coded shade of amount of malic remaining?
Partially, yes. But even when they say I am done I wait two weeks before sulfites get added. I only do about 4 tests a year and I don't like having chemicals sitting around unused is the main reason.
 

Ajmassa

just a guy
Joined
Oct 25, 2016
Messages
3,872
Reaction score
3,582
Location
S. Jersey/Philadelphia area
Most definitely will be erring on the side of caution. No need to rush anything here. Again, a great hobby for procrastinators!
I asked because that was the first I heard of chroma testing not being the the be-all-end-all. And if I did see that said, (I believe cmason1957 touched on it a few weeks ago) I suppose just didn't quite comprehend it at the time.
 
Top