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DETERMINATION OF BENTONITE REQUIREMENT
• Repeat the reading procedure for all samples (#2, #3, #4) and record all T1 and T2 values.
• For each sample verify if “T2<T1+2”: if so, the wine can be considered stabilized. Compare the
results. It is recommanded to choose the lowest dosage of bentonite necessary to stabilize the wine.
• To define the g/hL of bentonite to be added to the wine tank, just multiply by 100 the mL of 2,5%
bentonite suspension that was added to the HANNA vial (0.25 mL for vial #1, 0.50 mL for #2,
0.75 mL for #3 and 1.00 mL for #4):
Bentonite requirement in g/hL = mL of bentonite added with syringe x 100
For this example, 0.75 mL is the lowest bentonite dosage necessary to stabilize the wine sample.
Now just multiply the mL for 100 (0.75 x 100 = 75 g/hL) to obtain the bentonite requirement.
9.3. COMPARATIVE MODE
An alternative mode of measurement is Comparative Mode. It is possible to set a reference value (T1)
and let the instrument automatically compare turbidity values. See SETUP section.
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