This method is intended only for visually clear aged wines. The assay consists in nephalometric measurement, a binding reaction and repeated nephalometric measurement, on the basis of which the degree of demand for bentonite is evaluated.  

Nephelometric-chemical laboratory assay.

Parameter: measurement of turbidity [NTU]

Method, device: nephelometric method, photometer/density meter

Method compliant with: B. Zoecklein, Protein Stability Determination in Juice and Wine, Virginia Polytechnic Institute & State University, Virginia Cooperative Extension (1991), 463-015

Sample volume:  500 ml

The research report is issued in the English language.

In order for the wine to achieve its full flavour, it should be stable before bottling. One method used for clarifying it quicker is adding bentonite in order to precipitate any unstable substances. It mainly binds proteins and metal ions within its structure. Failure to clarify the wine properly can result in the wine becoming turbid or sediment being precipitated in the bottle, and it can also lead to microbiological disorders. The use of bentonite allows securing the wine. However, excessive amounts of bentonite adversely affect the final quality of the wine. Therefore, determining the exact dose of bentonite is extremely important.

Please note: the bentonite used in the determination must be sent together with the sample and it must originate from the same batch and have the same moisture content as the bentonite that will be added to the final wine.

Bentonite weight: 10 g

Provision of samples:

The test samples can be delivered in person to the company’s showroom in Łódź (it is possible then to choose the parameters tested and make payment on the spot) or sent by mail / courier service to the address 93-373 Łódź, ul. Pryncypalna 125, with a note saying ‘LABORATORIUM’. Additionally, please include with the package the description of samples and analyses selected (confirmation of order and payment via the Browin online store). Samples sent by mail/courier should be put into a clean, neutral container (e.g., after pure mineral water) and well secured in order to reach the laboratory safely.

Completion time:

The service delivery time is related to the number of ordered analyzes and the current laboratory occupancy and is up to 7 days.

We issue VAT invoices.

Please note: The samples sent are stored for 2 weeks and then disposed of. Any presumptive doubts need to be reported within that period.