SY2430 · TOTAL ACIDITY

SY2430 TOTAL ACIDITY kit sinatech

SY2430 TOTAL ACIDITY (pH7)

Colorimetric method for total acidity measurement

The majority acids in the grape are tartaric, L-malic, which represent about 90% of the total, and citric acid. In addition, during the fermentation process, other acids such as L-lactic, succinic or acetic appear that also contribute to total acidity. The total content of acids is important because it gives the wine its organoleptic characteristics, resulting in harsh wines when it is excessively high or flat, when it is too low. In addition, the total content of acids has relevance in terms of the conservation of wine, inhibiting the development of microorganisms.

ADVANTAGES

Liquid reagents ready-to-use
Wide measurement range: up to 10 g/L

KIT FORMAT

R1: 2x40
R2: 1 x 20
STD Inc.

METHOD
BTB

READING
Differential bi-reagent, 620 nm

RANGE
Up to 10 g/L (ac. tartarico)

LIMIT OF QUANTIFICATION (LoQ)
-

TESTS (Estimated)
-

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SY2428 · TOTAL SUGAR

SY2428 TOTAL SUGARS kit sinatech

SY2428 TOTAL SUGAR

Enzymatic method for sucrose, glucose and fructose measurement

In addition to monomeric hexoses (glucose and fructose), the must contains small amounts of sucrose disaccharide, which is hydrolyzed into fructose and glucose by the enzyme β-fructosidase (β-F). The natural sucrose content in the must is relatively low (and zero in the finished wine), and its addition is specifically prohibited in some countries. However, the addition of sucrose is a specific practice of the process of the production of sparkling wines (second fermentation) and in the captalization (to increase the alcoholic strength artificially, in specifically authorized areas). The determination of the total sugar content, including the one derived from the hydrolysis of sucrose, improves the control of the fermentation process both at its beginning and at the end (residual sugars), improving its general control.

ADVANTAGES

Liquid reagents ready-to-use
Joint measurement of sucrose, glucose and fructose
Wide measurement range: up to 7 g/L

KIT FORMAT

R1: 1 x 44 + 1 x 5,5
R2: 1 x 12 + 1 lyo
STD inc

METHOD
Enzymatic: BF/PGI/HK/G6PDH

READING
Differential bi-reagent, 340 nm

RANGE
Up to 7 g/L

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

TESTS (Estimated)
180

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SY2425 · POTASSIUM

SY2425 POTASSIUM kit sinatech

SY2425 POTASSIUM

Turbidimetic method for potassium measurement

Potassium is the most abundant cation in wine. Its concentration depends both on the grape variety, the soil conditions, the collection procedures (presence of scratches) and the methods used in winemaking. High values ​​of potassium in the grapes will lead to more basic musts, which could adversely affect the quality of the wine. Although most of the potassium salts are soluble, potassium bitartrate decreases its solubility as the concentration of alcohol increases, giving rise to precipitates that, although they do not affect the organoleptic properties of the wine, can be perceived as a decrease in quality.

ADVANTAGES

Liquid reagent ready-to-use
Standard included

KIT FORMAT

R1: 1 x 50
R2: 1 x 50

METHOD
Colorimetric: TPB

READING
Differential mono-reagent, 575 nm

RANGE
Up to 1500 mg/L

LIMIT OF QUANTIFICATION (LoQ)
20 mg/L

TESTS (Estimated)
230

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SY2424 · POLYPHENOLS

SY2424 TOTAL POLYPHENOLS kit sinatech

SY2424 POLYPHENOLS

Colorimetric method for total polyphenols measurement

The phenolic compounds of wine (natural phenols and polyphenols) are a broad group of chemical compounds that affect the taste, color and mouthfeel of the wine that come from the skin, pulp and seed of the grape. The specific distribution of the same is that which gives the wine its own characteristics, identifying the type of grape used and the process of elaboration. Its main function is to control the natural oxidation of the wine during the ripening and aging process and increase the stability of its organoleptic properties.

ADVANTAGES

Liquid reagent ready-to-use

KIT FORMAT

R1: 1 x 45
R2: 1 x 12
STD Inc.

METHOD
Colorimetric: Folin-Ciocalteu

READING
Differential bi-reagent, 670 nm

RANGE
Up to 3000 mg/L

LIMIT OF QUANTIFICATION (LoQ)
22 mg/L

TESTS (Estimated)
160

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SY2421 · GLUCOSE

SY2421 GLUCOSE kit sinatech

SY2421 GLUCOSE

Enzymatic method for glucose measurement

D-Glucose and D-Fructose are the main reducing sugars (fermentable) 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

Liquid reagent ready-to-use

KIT FORMAT

R1: 1 x 40
R2: 1 x 15

METHOD
Enzymatic: HK/G6PDH

READING
Differential bi-reagent, 340 nm

RANGE
Up to 8 g/L

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

TESTS (Estimated)
220

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