Free so2 Calc

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Alexi82
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Joined: Thu May 12, 2016 9:56 pm

Free so2 Calc

Post by Alexi82 »

Hi

Hoping someone can help.

There is a particular kit available to measure so2 in wine samples, however they won't give the concentrations of the reagents so you have to purchase from them.

Is there a way to figure it out based on the following reaction and procedure?


IO3 - + 5I- + 6H+ >3I2 + 3H2O generation of iodine from iodate

SO2 + I2 + H2O > 2I-
+ SO3 + 2H+ reaction of SO2 and iodine

SO2 titrant which is iodine 0.0156N
2ml acid reagent (h2so4)
2ml reactant solution (starch indicator)

ppm SO2 = (64 * V * N * 1000) /2s where v = volume titrant and n = normality of titrant and s = ml sample
ppm SO2 = 20 * V
expert
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Joined: Sun Feb 22, 2009 8:08 pm

Post by expert »

check this article
http://www.hach.com/asset-get.download. ... 9641556310

or Google the following: Free, Total and Double SO2 in Wine
Remember safety first! Check MSDS and consult with professionals before performing risky experiments.
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