Rectified concentrated grape must

Rectified concentrated grape must

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Agricultural and fisheries research
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Commission of the European Communities
agriculture
Rectified concentrated grape must Commission of the European Communities
agriculture
Rectified concentrated grape must
P. Dupuy
INRA — Station de microbiologie des fermentations
17, Rue Sully — BV 1 540
F-21034 Dijon Cedex
Directorate-General
Agriculture
1985 EUR 9441 EN Published by the
COMMISSION OF THE EUROPEAN COMMUNITIES
Directorate-General
Information Market and Innovation
Bâtiment Jean Monnet
LUXEMBOURG
LEGAL NOTICE
Neither the Commission of the European Communities nor any person
acting on behalf of the Commission is responsible for the use which might
be made of the following information
This publication is also available in the following languages:
DE ISBN 92-825-4579-2
FRN 92-825-4581-4
IT ISBN 92-825-4582-2
Cataloguing data can be found at the end of this publication
Luxembourg, Office for Official Publications of the European Communities, 1985
ISBN 92-825-4580-6 Catalogue number:
© ECSC-EEC-EAEC, Brussels · Luxembourg, 1985
Printed in Belgium MEETINGS
BRUSSELS 18 February 1980.
BRUSSELS 1 July 1980.
BRUSSELS 16 July 1981.
BRUSSELS 17 March 1982.
SICILY
30 September and 1 October 1982
TRIER 30 May and 1 June 1983.
MILAN
30 November and 1 December 1983.
- Ill -CONTENTS
CHAPTER I : INTRODUCTION 1
The problem facing the Community's wine sector
Grape sugar cannot solve the whole problem 2
Out of the frying pan into the fire? 3
Using grape sugar might disturb the policy being followed
in the wine sector 5
Concentrated must is a thing of the past; the future belongs
to grape sugar 7
Work and achievements within the agrimed framework 8
Community rules of rectified concentrated must 11
Production 1 1
Use
Other provisions3
CHAPTER II : CONCENTRATED MUSTS5
Preparation of musts
Evaporation 17
Operation of the heat exchanger 19
Determining heating capacity
Energy saving 20
Water requirements1
Products made2
Crystallization
Desulphiting3
Storage of concentrates
Storage conditions4
CHAPTER III : RECTIFIED CONCENTRATED MUSTS 25
1. Disadvantages of concentrated musts
2. Rectified concentrated musts7
2.1 Clarification of the must
2.2 Setting by means of calcium hydroxide8
- V 2.3 Recovery of tartrates by the addition of calcium
carbonate 29
2.4 Decolorization by active charcoal 30
2.5 Desulfurization of the must
2.6 Preconcentration of stopped must1
2.7 Rectification by means of ion-exchange resins and
synthetic polymers 3
2.7.1. Cationic resins4
2.7.2. Anionic resins5
2.7.3. Finishing6
2.7.4. Regeneration
2.8 Evaporation 4
2.9 Storage of rectified concentrated must 43
2.10 Treatment of effluent8
2.11 Industrial plant 50
Costs2
Main reasons for plant malfunction
CHAPTER IV : ANALYTICAL CHARACTERISTICS OF RECTIFIED CONCENTRATED
MUSTS5
1. Choice of compounds for analysis 5
2. Physico-chemical analysis, description of methods 57
1 - Preparation of the sample8
2 - Density at 20°C.
3 - Total sugars 60
4 - Glucose and fructose1
5 - Sucrose4
6 - Measuring the pH7
7 - Total acidity
8 -l cations
9 - Conductivity9
10 - Ethanol 7
11 - Hydroxymethylfurfural (HMF)3
12 - Sulphur dioxide6
13 - Folin-Ciocalteu index
14 - Phenolic compounds8
15 - Meso-inositol 80
16 - Total colloids1
17 - Optical density2
3. Microbiological analysis of rectified concentrated
musts
4. Organoleptic analysis of rectifiedd musts 84
5. Results ofs ofd concentrated musts5
- VI 93 CHAPTER V : USE OF RECTIFIED CONCENTRATED MUSTS
Test carried out at Colmar 1°)
Testd out at Asti 94 2°)
First test 94
97 Second test
Conclusions 99
99 3°) Test carried out at Trier
101 4°) Testd out at Bristol
Conclusions 105
107 CHAPTER VI : DETECTION OF FRAUD IN RECTIFIED CONCENTRATED MUSTS
CHAPTER VII : PROPOSED NEW RULES ON THE COMPOSITION OF RECTIFIED
CONCENTRATED MUSTS 113
115 ANNEXES
Dissolved dry matter at relative density 20°/20° Annex 1 117
Annex 2 Determination of dissolved dry matter from the refraction
index, in accordance with AOAC, 10th edition, N° 43.008,
pp. 828-829 (1965) 119
Annex 3 Definition of rectified concentrated grape must
124 according to regulation (EEC) N° 337/79
Annex 4 Commissionn (EEC) N° 2253/82 of 12 august
125
Annex to regulation 2253/82 127
Annex 5 Rules : authorization procedure for the production
of rectified concentrated grape must 129
MEMBERS' ADDRESSES 131
VII