A GENERAL INTRODUCTION TO ANTIOXIDANTS …aditiva-concepts.ch/download/General introduction to...
Transcript of A GENERAL INTRODUCTION TO ANTIOXIDANTS …aditiva-concepts.ch/download/General introduction to...
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Oils & Fats
A GENERALINTRODUCTIONTO ANTIOXIDANTS
GRINDOX™ Antioxidantsand GUARDIAN® Rosemary Extract
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Oils & Fats
•Why is it a problem?
•What is lipid oxidation?
•How can it be controlled?
•Antioxidants
types and
functions
•Technical service
•Literature
Contents
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Oils & Fats
Why is oxidation a problem?
• changes in colour, aroma and flavour
• influence on nutritional value
• can be a health risk
Why useantioxidants?
Why is it a problem?
What is lipid oxidation?
How can it be
controlled?
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Oils & Fats
What is lipid oxidation?
Free radicals
Initiators
Fat, oilFree radicals Aldehydes,
ketones,acids, etc.
Peroxides
Oxygen
PolymersVicious circle:
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Oils & Fats
How can it be controlled?
By having control of:
• temperature• light• oxygen • metals• time
• Optimum use of antioxidants
Why useantioxidants?
Why is it a problem?
What is lipid oxidation?
How can it be
controlled?
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Oils & Fats
Why use antioxidants?
Antioxidants
• delay oxidation
• prolong shelf life
Why useantioxidants?
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Oils & Fats
What does an antioxidant do?
A•
O•
OH
L•
LHUnreactive antioxidant radical
Lipid radical
AntioxidantAH
Repaired lipid
Why useantioxidants?
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Oils & Fats
Three types of antioxidant
Antioxidants are generally divided into three types:
Antioxidants
BHA, BHT, propyl gallate, TBHQ
Ascorbyl palmitate, tocopherols
Rosemary extract
Antioxidant types
Traditional antioxidants
Vitamin-basedantioxidants
Rosemary extract
Regulatory status (generally)
Restricted use in foods. Typically max. 100-200 ppm. TBHQ not permittedin the EU
Generally permitted in many foods as GMP/q.s.
Natural flavouring
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Oils & Fats
Danisco sells blends
Benefits of blends
Benefits
Delay lipid oxidation, prolong shelf life and ensure consistent quality
Prevent metal ions from acting as initiators of oxidation processes
Liquid product can be pumpedin-line
Uniform distribution ofantioxidant
Oil-soluble
Water-dispersible
Powder
Ingredient
One or more antioxidants
Components
Antioxidant
Chelator
Carrier
Citric acid, citric acid ester
Emulsifiers, vegetable oil, propylene glycol, maltodextrin
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Oils & Fats
Danisco blends - product examples
Oils and fats10% ascorbyl palmitate, 10% tocopherols
GRINDOX™ 539
Oils and fats, refined as well as crude
20% TBHQ, 10% citric acid
GRINDOX™ 204
Antioxidants
types and
function
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Oils & Fats
GRINDOX™ 204 (20% TBHQ, 10% citric acid)
inhibits hydroperoxide development in margarine
Table margarineHydroperoxide development at 5°C
0
5
10
15
20
0 1 2 4 5 6 7 9.5 10 12 13Months
Pero
xide
val
ue (m
eq/k
g oi
l)
Nothing added 1000 ppm GRINDOX™ 204
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Oils & Fats
Rosemary extract
•Extract from the leaves of rosemary (Rosmarinus officinalis)
•Regulatory status: flavouring, not antioxidant
Antioxidants
types and
function
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Oils & Fats
GUARDIAN® Rosemary Extract - product examples
Rosemary extract (5% phenolic diterpenes) + carrier
PowderGUARDIANRosemary Extract 11
Rosemary extract (5% phenolic diterpenes) + carrier
Liquid, water-dispersible
GUARDIANRosemary Extract 09
Rosemary extract (5% phenolic diterpenes) + carrier
Liquid, oil-solubleGUARDIANRosemary Extract 08
COMPOSITIONFORM AND SOLUBILITY
PRODUCT
• Natural extract with antioxidant properties• Standardised antioxidant activity• Formulated carrier systems
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Oils & Fats
GUARDIAN® Rosemary Extract
L ife E x te n s io n (R a n c im a t™ 1 1 0 ° C ) L a r d v e r s u s P h e n o l ic D i te r p e n e s in R o s e m a r y E x t r a c t
0
5 0
1 0 0
1 5 0
2 0 0
2 5 0
3 0 0
3 5 0
0 1 0 2 0 3 0 4 0 5 0
P h e n o l ic D i te r p e n e s (p p m )
% L
ife E
xten
sion
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Oils & Fats
Ideally an antioxidant should
•be easy to handle and use
•be permitted by local food regulations
•have no impact on the aroma, flavour or colour of the oil
•be effective in low concentrations
Antioxidants
types and
function
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Oils & Fats
Technical service
Technical service
Our technical service comprises:
• quality and stability tests
• application knowledge
• technical literature
• tailor-made customer solutions
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Oils & Fats
Quality and stability tests
In our laboratory we can perform quality and stability tests on all kinds of products, e.g.
Oxidograph™ Oxipres™ Rancimat™
Thermostatic heating blockand magneticstirrer
Transducer
Recorder
Transducer
Recorder
Glass jar with loose glass lid
Stainless steel bomb (with lid and per-pendiculartube)
Thermo-static heating block
Reactionvessel
Flowmeter
Conductivitysignal amplifierand 6-channelpoint recorder
Absorption vessel containing distilled water and double platinum foil electrodes
Aluminium heating block
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Oils & Fats
Technical literature
• Lipid oxidation and GRINDOX™ Antioxidants: TM 16, 25, 26• Test methods for lipid oxidation: TM 24• GUARDIAN® Rosemary Extract: TM 36• Oils and fats: TM 1513• Bakery products: TMs 36, 1033• Meat and poultry: TM 36 • Potato flakes: TMs 1008, 1032• Table margarine: TM 1532
Technical service
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Oils & Fats
Antioxidant staff in Brabrand, Denmark
Product division• Jørgen Sørensen,
Product Manager• Mie Svidt,
Product Service
Innovation• Torben Isak, Senior
Application Manager Areas: South America, Mexico, Asia
• Anne-Mette Frost, Application Manager Areas: Europe
Back-up Innovation• Inge Merethe Søe,
Laboratory Technician• Jette Svensson,
Secretary
Danisco A/SEdwin Rahrs Vej 38DK-8220 BrabrandTel: +45 89 43 50 00Fax: +45 86 25 10 77
Technical service
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Oils & Fats
Danisco sells
GRINDOX™ Antioxidants
GUARDIAN® Rosemary Extract
ANTIOXIDANT BLENDS FOR ALL KINDS OF APPLICATION