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Metals (calcium, copper, iron, zinc, silver, lead, magnesium, potassium, sodium)

Some metals, in particular copper and iron, can lead to haze formation in bottled wine. It is therefore recommended that winemakers screen for these metals prior to bottling. In addition, due to the increased use of copper sulphate as a fining agent and the growth in organic viticulture, copper levels in wine are rising worldwide.


For the heavy metal lead, wines can be screened for compliance with the legal limit of 0.1 mg/litre.


Amount to send: 250ml for any number of metals


Copper

The addition of copper sulphate pentahydrate is used to remove bad tastes or odours in wine due to the presence of sulphur compounds such as hydrogen sulphide. It is essential to ensure that the copper levels are below the recommended maximum of 0.5 mg/litre, above which haze problems can occur.


Methods: copper is determined by atomic absorption


Amount to send: 250ml for any number of metals


Iron

At high concentrations, the presence of iron can increase the risk of forming an iron casse (haze). Winemakers, if aware of this problem, can use a variety of methods to correct it e.g. addition of gum Arabic, citric acid or tannin. Again, we recommend that this analysis is carried out pre–bottling so that the winemaker can apply palliative treatments and avoid the expense of the wine being rejected.


Amount to send: 250ml for any number of metals



Contact us

If you would like further information please email us at support@campdenbri.co.uk or call our switchboard on +44(0)1386 842000 and they will be happy to direct your call to the relevant person.


Where we refer to UKAS Accreditation

The Campden BRI group companies listed below are both accredited in accordance with the recognised International Standard ISO/IEC 17025:2005 by the United Kingdom Accreditation Service (UKAS). The accreditation demonstrates technical competence for a defined scope of methods, specific to each site, as detailed in the schedules of accreditation bearing the testing laboratory number. The schedules may be revised from time to time and reissued by UKAS. The most recent issue of the schedules are available from the UKAS website www.ukas.com

Campden BRI (Chipping Campden) Limited is a UKAS accredited testing laboratory No. 1079 Campden BRI (Nutfield) is a UKAS accredited testing laboratory No. 1207