SN/T 4675.24-2016Determination of Folin-Ciocalteu index in wine for export - Spectrophotometry method (English PDF)

Foreword

SN/T 4675 "export wine quality and safety analysis method" is divided into 30 parts.

--- SN/T 4675.1 Determination of export glycerol in the enzyme method;

--- SN/T 4675.2 Export wine 2,3-butanediol Determination of gas chromatography;

--- Determination of stable carbon isotope ratio of ethanol in exported wine by SN/T 4675.3;

--- SN/T 4675.4 Determination of lactic acid in export wine enzymatic;

--- SN/T 4675.5 wine exports - Determination of organic acids by ion chromatography;

--- SN/T 4675.6 Determination of glucose, fructose and sucrose in export wines;

--- SN/T 4675.7 Determination of acetaldehyde in wine exports - Gas Chromatography - Mass Spectrometry;

--- SN/T 4675.8 Export wine 5-hydroxymethyl furfural Determination of liquid chromatography;

--- SN/T 4675.9 Exported wine - Determination of diethylene glycol - Gas Chromatography - Mass Spectrometry;

--- SN/T 4675.10 Determination of ochratoxin A in export wines - Liquid chromatography - mass spectrometry/mass spectrometry;

--- SN/T 4675.11 Determination of 7 kinds of anthocyanins in exported wine by ultra performance liquid chromatography;

--- SN/T 4675.12 export wine lysozyme Determination of liquid chromatography;

--- SN/T 4675.13 Determination of 2,4,6-trichloro-phenyl ether residues in exported wine by gas chromatography-mass spectrometry;

--- SN/T 4675.14 Determination of natamycin in wine exports by liquid chromatography - mass spectrometry/mass spectrometry;

--- SN/T 4675.15 exported wine salicylic acid, dehydroacetic acid and p-chlorobenzoic acid Determination of liquid chromatography;

--- SN/T 4675.16 Determination of fumaric acid in exported wine by liquid chromatography - mass spectrometry/mass spectrometry;

--- SN/T 4675.17 Determination of butyl tin content in exported wine - Gas Chromatography - Mass Spectrometry/Mass Spectrometry;

--- SN/T 4675.18 Determination of dithiocarbamate residues in export wines; headspace gas chromatography;

Determination of sodium, magnesium, potassium, calcium, chromium, manganese, iron, copper, zinc, arsenic, selenium, silver, cadmium and lead in exported wines;

--- SN/T 4675.20 Determination of rare earth elements in exported wine by inductively coupled plasma mass spectrometry;

--- SN/T 4675.21 Determination of soluble inorganic salts exported wine Ion chromatography;

--- SN/T 4675.22 Determination of total sulfur dioxide in wine exports colorimetry;

--- SN/T 4675.23 Determination of ammonia nitrogen in wine and grape juice exports continuous flow analyzer;

--- SN/T 4675.24 Export wine Fulin - Schock Index Determination spectrophotometer;

--- SN/T 4675.25 Determination of color of export wine CIE1976 (L * a * b *) color space method;

--- SN/T 4675.26 Determination of turbidity of exported wine - Scattered light method;

--- SN/T 4675.27 Determination of export wine alkaline ash;

--- SN/T 4675.28 exports of wine bacteria, mold and yeast count;

--- SN/T 4675.29 Export wine wine yeast test real-time fluorescent PCR;

--- SN/T 4675.30 Exported wine Bayer engaged yeast test real-time PCR method.

This section is part 24 of the SN/T 4675.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This section identical with the International Organization of Wine and Viniculture (OIV) method OIV-MA-AS2-10 "wine Forlin Schoca Indication Determination. " This section is consistent with the method in technical content, but taking into account the characteristics of our own standards and the Chinese expression of the OIV Method OIV-MA-AS2-10 has been individually editorially modified.

This part of the national certification and accreditation supervision and management committee proposed and centralized.

This part of the drafting unit. People's Republic of China Beijing Exit Inspection and Quarantine, People's Republic of China Guangdong Exit Inspection and Quarantine Epidemic

1 Scope

This part of SN/T 4675 specifies the method for the detection of the wine Forint - Schock index.

This section applies to the determination of wine Forlin - 肖卡 index.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6682 analytical laboratory water specifications and test methods

3 Method summary

The Forint-Schoka Index reflects the concentration of polyphenols in wine. Polyphenols in wine samples and the Fulin-Schock trial Agent redox reaction, the reaction of the blue mixture has the maximum absorption at 750nm, the use of spectrophotometer absorbance Degree of determination, calculated after the Forint-Schoca index.

4 Reagents and materials

Unless otherwise indicated, the reagents used in this standard are of analytical grade. When calibrating the instrument, the water used to prepare the solution and the test sample shall be in accordance with GB/T 6682 secondary water requirements.

4.1 Forint-SchocaVal reagent.

4.2 sodium carbonate solution .20% sodium carbonate. Weigh 20g sodium carbonate, dissolved in water, constant volume to 100mL.

5 Instruments and equipment

5.1 UV-visible spectrophotometer. The wavelength range includes 750nm.

5.2 quartz cuvette. The optical path is 1cm.

5.3 electronic balance. Sense of 0.1g.

5.4 with stopper volumetric flask .100mL.

6 Determination steps