Colour Kit
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The colour of wines is one of the main parameters of sensory evaluation. It also reflects certain characteristics of the product such as grape variety, vintage and state of evolution. In oenology, it is common practice to observe absorbance values at 420 nm, 520 nm and 620 nm as the sum of 420 nm + 520 nm gives the colour intensity of the product, further adding the absorbance value at 620 nm gives the modified colour intensity, while the ratio 420 nm / 520 nm gives the hue of the product. These data are useful and expendable in the objective evaluation of the product both over time and in new vintages. For example, for red wines, a correct ageing process with controlled O2, in which colour stabilisation takes place (polymerisation between tannins and anthocyanins by means of an ethyl bridge) leads to an increase in the contribution given by the wavelength at 620 nm; whereas in the case of unwanted oxidative processes, the contribution given by the wavelength at 420 nm increases.
Benefits
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Colour determination with the Hyperlab Basic multi-parametric analyser
The intensity of a wine's colour can provide valuable information on its quality, maturity and ageing potential. It is a visual indicator that helps us understand the concentration of phenolic compounds, such as polyphenols, that contribute to the wine's taste, aroma and overall structure.
To obtain an accurate and reliable measurement of colour intensity, the choice of an appropriate process is crucial. The Hyperlab Basic Multiparametric Analyser from Steroglass uses a microprocessor-controlled sampling arm to take the wine sample, dilute it (if necessary) and measure the colour intensity in a precise and automated manner. It also provides absorbance values at 420, 520 and 620 nm and automatically calculates the colour shade. Thanks to its Hyperlab technology, it can perform all the operations required by analytical procedures, guaranteeing reliable and reproducible results.
Technical features
READY TO USE: Liquid and easy to use.
PRECISION AND SPECIFICITY: Characterized by high specificity, they provide accurate and repeatable data.
LOW COSTS AND LONG SHELF LIFE: Minimal cost per test and a long shelf life (average 24 months).
FAST ANALYSIS: Allow for quick and reliable results (up to 300 tests/hour), especially when used with automated instruments like our HYPERLAB series analyzers.
SIMPLE AND ECONOMIC CALIBRATION: It is possible to use single-method and/or multi-parametric calibration/verification standards. The determination of the Blank is performed automatically every 12 hours with the Hyperlab analyzers.
METHODS APPROVED BY INTERNATIONAL STANDARDS: Numerous enzymatic methods have been approved and validated by international organizations such as:
ISO (International Standardization Organization)
AOAC (American Association of Analytical Chemists)
IFU (International Federation of Fruit Juice Producers)
OIV (International Wine Office)
IDF (International Dairy Federation)
EBC (European Brewery Convention) and many others.
STERGLASS ENZYMATIC AND COLORIMETRIC KITS
Enzymatic and colorimetric kits are widely used in quality control for the main analytical determinations of a variety of food products such as fruit juices, wine, beer, dairy products, eggs, meat, and for the monitoring of fermentation processes carried out by microorganisms for the determination of sugars, organic acids, and other components such as sulfites, phenolic compounds, and metals.
Based on high-quality purified enzymes, enzymatic analysis allows for precise, highly accurate, and repeatable measurements, even in complex matrices. The absorbance variation, measured spectrophotometrically as a result of enzymatic transformations, is closely correlated with the concentration of the various analytes sought.
Industries
Applications
Product codes
| Steroglass code | Description | N° Analyses |
|---|---|---|
| SQPE054875 | Colour kit 4x100ml | manual 200/400 ; automatic 800/1200 |