Tomatoville® Gardening Forums


Notices

Member discussion regarding the methods, varieties and merits of growing tomatoes.

Reply
 
Thread Tools Display Modes
Old February 19, 2018   #1
Greatgardens
Tomatovillian™
 
Greatgardens's Avatar
 
Join Date: Feb 2010
Location: Indiana
Posts: 673
Default Refractometer for fruit (tomato) juice?

I thought I'd take my variety evaluations up a notch by testing the Brix of various cherry tomatoes with a refractometer. Anyone doing this, and have a suggestion for model to purchase? Lots to choose from on Amazon and eBay. Typically under $50 for a "consumer" model. The most common range I've seen for fruits/wines is 0-32%.

Any thoughts?

Also- does the measured Brix show just soluble sugars or also acids, etc?

-Greatgardens

Last edited by Greatgardens; February 19, 2018 at 09:48 AM.
Greatgardens is offline   Reply With Quote
Old February 19, 2018   #2
oakley
Tomatovillian™
 
oakley's Avatar
 
Join Date: Jun 2015
Location: NewYork 5a
Posts: 2,039
Default

"...Within a given species of plant, the crop with a higher refractive index will have a higher sugar content, higher mineral content, higher protein content and a greater specific gravity or density."

https://foliarfert.com/pages/refractometer.htm

I use mine for my grapes and fruit trees. All planted 15 or so years ago. I know them so
well and how they should ripen for best storage and harvest. One of my pear trees,
loaded with fruit, a week from perfect, lost a limb I thought was due to heavy fruit...
a few days later I caught a bear sitting in it. Two more smaller branches broken and a few
fruit he could not reach. Bummer. He obviously knew they were ripe and ready.

Fun tool to have around. Lots of charts on-line to print out a keep handy for various
veg/fruit.

Rarely brix tomatoes but last Fall I had an exceptional pink cherry and did race for the
refractometer. It brixed at 11.5...top of the chart for a tom. Only at F3. Hope that flavor
holds this season.

I keep eyeglass cleansing wipes in the case. Needs to be kept very clean.
Don't think I paid more than 50 but its been a while. I us 'fake check' or one of the review
checkers that helps spot fake reviews when they seem suspicious. Especially for
an item over a certain price point.
oakley is offline   Reply With Quote
Old February 19, 2018   #3
berryman
Tomatovillian™
 
Join Date: Feb 2016
Location: central utah
Posts: 231
Default

I've had one for twenty something years and it has been very informative. I think I spent about two hundred bucks for it.
Great gardens, it doesn't measure acidity, just soluble sugars, but this can be revealing because there are many fruits, tomatoes included that do not taste so sweet but when you test them they can be quite high!
Most of the time, in these cases, the acidity is masking the sweetness and you wouldn't know it was there without the refractometer. This can be especially common with apples and pears because you not only have acidity, you've got astringency, which is caused by tannins, that can make the fruit taste very unsweet.
berryman is offline   Reply With Quote
Old February 20, 2018   #4
amideutch
Tomatovillian™
 
amideutch's Avatar
 
Join Date: Feb 2006
Location: Germany 49°26"N 07°36"E
Posts: 4,979
Default

Here is a good read on BRIX with tables showing typical Brix readings for different fruits and vegetables.
http://tandjenterprises.com/brix-equ...REFRACTOMETERS

Here is the refractometer I bought from Amazon and I have had no problems with.

https://www.amazon.com/Brix-Refracto...280-32+Brix%29
__________________
Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways,
totally worn out, shouting ‘...Holy Crap .....What a ride!'
amideutch is offline   Reply With Quote
Old February 20, 2018   #5
Lindalana
Tomatovillian™
 
Join Date: Oct 2013
Location: Chicago IL
Posts: 803
Default

Yeah, I got this refractometer that Ami recommended, easy to use and good quality. I do check my tomatoes as I play around with some "alchemy" concoctions.
Lindalana is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:43 PM.


★ Tomatoville® is a registered trademark of Commerce Holdings, LLC ★ All Content ©2017 Commerce Holdings, LLC ★