SD6021 · GLUCOSE

DIONYSOS reagents

SD6021 GLUCOSE

SD6021-D-GLUCOSE

Enzymatic method for glucose measurement

D-Glucose and D-Fructose are the main reducing sugars present in grapes and other fruits. The content of D-glucose and D-fructose in grapes is similar (in a ratio between 0.74 and 1.12), with small variations depending on the ripeness of the grape and its variety. Since D-glucose is fermented more rapidly by yeasts, monitoring the relationship between D-glucose and D-fructose, in addition to its total sum, provides information on both the fermentation process and the final degree of expected sweetness. Fructose levels are calculated from the total glucose and fructose content (code SY2404) by directly subtracting the glucose content.

ADVANTAGES

Ready-to-use liquid reagents

KIT COMPOSITION

R1: 2 x 30 mL
R2: 1 x 15 mL
CTRL inc.

METHOD
Enzymatic: HK/G6PDH

READING
Differential bi-reagent method, 340 nm

MEASUREMENT RANGE
Up to 8 g/L

LIMIT OF QUANTIFICATION (LoQ)
0,03 g/L

TESTS (Estimated)
225

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SD6020 · GLYCEROL

SD6020 GLYCEROL

Enzymatic method for glycerol measurement

Glycerol (or glycerin) is a natural byproduct of alcoholic fermentation, providing body-to-mouth sensation. The glycerol content is directly related to the degree of maturity of the grape, the microorganisms present and the fermentation procedure used (temperature, yeast species, nitrogen source).

ADVANTAGES

Single reagent

KIT COMPOSITION

R1: 2 x 30 mL
CTRL inc.

METHOD
Enzymatic: HK/GPO/POD

READING
Differential bi-reagent method, 340 nm

MEASUREMENT RANGE
Up to 12 g/L (0.40 g/L, per dilution factor 30)

LIMIT OF QUANTIFICATION (LoQ)
0,01 g/L

TESTS (Estimated)
180

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SD6019 · COLOR INDEX

SD6019 COLOR INDEX

Colorimetric method for color index measurement

The color of the wine is the result of the mixture of different colored compounds, mainly of reddish tones (mainly anthocyanins), blue (iron complexes) and yellow (catechins). The color index is an indicator that takes into account absorption at 420, 520 and 620 nm.

ADVANTAGES

Single reagent

KIT COMPOSITION

R1: 4 x 30 mL

METHOD
Colorimetric

READING
Direct absorbance

MEASUREMENT RANGE
Up to 16,50 OD

LIMIT OF QUANTIFICATION (LoQ)
0,11 (A420), 0,14 (A520), 0,12 (A620)

TESTS (Estimated)
200 (x3)

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SD6018 · COPPER

SD6018 COPPER

Colorimetric method for copper measurement

The presence of copper in wine is common due to both the phytosanitary treatments carried out on the grapes, as well as the controlled addition of copper salts as part of the winemaking process. Most of the copper is precipitated in the form of sulphides and subsequently filtered. However, a high residual concentration thereof is toxic and can severely affect the alcoholic fermentation process, accelerate phenolic oxidation, cause turbidity and produce precipitates in reducing media. The control of copper concentration is essential to ensure both stability during the ripening process and ensure safe consumption.

ADVANTAGES

Ready-to-use liquid reagents
High sensitivity - LoQ 0,3 mg/L (white and rosé wine)
Single reagent
Standard included

KIT COMPOSITION

R1: 1 x 30 mL
R2: 1 x 30 mL
CTRL Inc
STD Inc.

METHOD
Colorimetric: 3,5-DiBr-PAESA

READING
Differential mono-reagent, 560 nm

MEASUREMENT RANGE
Up to 2 mg/L

LIMIT OF QUANTIFICATION (LoQ)
0,1 mg/L

TESTS (Estimated)
140

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SD6016 · CATECHINS

SD6016 CATECHINS

Colorimetric method for catechins measurement

Catechins are a group of flavonoid polyphenols found mainly in the seeds and to a lesser extent in the skin. They occur naturally as a defense mechanism against berry infections, so their concentration is higher in varieties grown in humid weather. They are responsible for the bitter notes in the taste of the wine and, because they have antioxidant properties, they contribute to provide color stability during the ripening process. The content of catechins in the sample is directly related to the crushing process and the period of contact with the grape skin.

ADVANTAGES

Liquid reagent ready-to-use
High sensitivity - LoQ 6 mg/L
Standard included

KIT COMPOSITION

R1: 1 x 30 mL
R2: 1 x 30 mL
CTRL inc.
STD inc.

METHOD
Colorimetric: Cinnamaldehyde

READING
Differential bi-reagent, 620 nm

MEASUREMENT RANGE
Up to 500 mg/L

LIMIT OF QUANTIFICATION (LoQ)
6 mg/L

TESTS (Estimated)
140

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