1. Department of Viticulture and Oenology Stellenbosch University
Chemical and sensorial composition of 2016 Shiraz SA Wine Challenge winners
Prof Wessel du Toit
Department of Viticulture and Oenology Stellenbosch University

2. We all love our jobs!

3. What makes a competition winning wine?
Institute for Grape and Wine Sciences
Analytical, technology transfer, sensory, viticulture and oenology
Chenin blanc, Sauvignon blanc and Shiraz

4. Shiraz Challenge
Top 12 Shiraz Challenge wines evaluated - both sensory and chemistry
4 wine that scored the lowest marks

5. Chemical analyses Rotundone Alpha and beta ionone and Damascenone
Vanilline, lactones, eugenol, etc.
Tannins, anthocyanins, total phenolics

6. Sensorial analyses
Please TASTE the wine in the proposed ORDER from LEFT to RIGHT- randomized
Score global quality of each main criteria:
appearance
nose
palate
Describe the wines Using The Given Criteria. Please provide 3-5 descriptors to describe the appearance, nose/aroma and palate

7. Results: Phenolic

8. Chemical analyses: aroma impact
Wine
Rotundone ng/L
Beta- damascenone µg/L (OT 2-7)
Beta-ionone
ng/L
(OT 90)
Alpha-ionone
Windmeul 2013
1.5
1.98
139
701
Eagle’s Nest 2013 18
1.14
136
779
Alto 2013 2
0.91 99
913
De Morgenzon 2014
4.5
1.34
107
261
Rickety Bridge 2013
17.5
1.54 95
589
Laborie 2014
1.3
1.22 77
453
KWV Shiraz 2013
1.7
1.39
102
745
Strandveld 2012
13.5
0.86 85
1016
Saronsberg 2014
0.8
1.85
121
319
Cederberg 2014
3.60
163
Fairview 2013
16.6
1.00 60
773
Babylonstoren 2014
2.09
146
384
Wine A
2.4
1.72
140
162

9. Chemical analyses: wood derived
Wine
Trans lactone
Cis-lactone
Vanillin
eugenol
Windmeul 2013
234
267 59 44
Eagles’ Nest 2013
144
283
249 42
Alto 2013
122
386
129
De Morgenzon 2014 99
209
174 30
Rickety Bridge 2013 88
164
138 25
Laborie 2014
156
417
248 49
KWV Shiraz 2013
162
404
127 48
Strandveld 2012
130
264 75 39
Saronsberg 2014
213
398
214 55
Cederberg 2014
114
253
242 37
Fairview 2013
185
305
258 51
Babylonstoren 2014
232
245 32
Wine A 90
154
118 23

10. Top 12 Challenge winners Alto Babylonstoren De Morgenzon
Rickety Bridge

11. Top 12 Challenge winners
Cederberg
Saronsberg
Windmeul
Laborie

12. Top 12 Challenge winners
Eagle’s Nest
Strandveld
Fairview
KWV

13. Four lowest scoring wines
Wine A
Wine C
Wine L
Wine O

14. Quality tasting results
Wine
Mark
No of words
Sum of citations
Windmeul
14,6 ab 33
192
Eagles nest
15.0ab 24
146
Alto 31
175
De Morgenzon
15,1 ab 32
173
Ricketty Bridge
14,3 ab 34
184
Laborie
14,9 ab
215
KWV
15,2 ab
180
Strandveld 29
178
Saronsberg
15,3 ab 35
205
Cederberg
15,4 ab
217
Fairview
16,0 a
174
Babylonstoren
188
Wine A
12,6 b
147
Wine C
13,6 ab 26
148
Wine L
13,1 b
168
Wine O
13,5 ab
162

15. What can you take home? Judges awarded different styles
Marks of these wines very close
Faulty, thin wines not received well
Award winning wines more complex with more citations

16. Acknowledgements
Producers who donated wines Mihaela Mihnea Jose Luis Alexandre-Tudo Vinlab Institute for Grape and Wine Sciences