ongoing challenges of fruit juice authentication & economic adulteration
DESCRIPTION
Ongoing Challenges of Fruit Juice Authentication & Economic Adulteration. Dana A Krueger. Fruit Juice Economic Adulteration. Fruit juice can be diluted with less expensive sugars: $1.00 + per pound fruit solids vs. $0.20 for sugar and HFCS - PowerPoint PPT PresentationTRANSCRIPT
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Ongoing Challenges ofFruit Juice Authentication &
Economic Adulteration
Dana A Krueger
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Fruit Juice Economic Adulteration•Fruit juice can be diluted with less
expensive sugars: $1.00 + per pound fruit solids vs. $0.20 for
sugar and HFCS•Premium juice types can be extended
with less costly types• Juices can be “enhanced” with improper
additives such as colors or acids
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Adulteration with Sugars
•Sugar and Invert Sugar •High Fructose Corn Sweetener•Specialty Sweeteners such as Inulin
Syrups and Rice Syrup
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Substitution of Cheaper Juices
•Apple, White Grape and Pear Juices•Deionized Grape, Pear and Pineapple
Sugars•By-products such as pomace extract or
peel juice•Almost anything in high priced
specialties like berry juices and pomegranate
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Undeclared Enhancement withFood Additives
•Acidulants – Malic Acid, Citric Acid etc.•Artificial Colors•Artificial Flavors•Vitamin C and other Nutrients
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The Sad History of Adulteration
Major Adulteration Scandals: •Apple Juice in late 1970’s•Orange Juice – U.S. Midwest in late 1980’s,
Canada, UK, Australia in early 1990’s•Cranberry Juice in 1995-6•Apple Juice again in the mid 1990’s•Pomegranate Juice in 2006-2007
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Approaches to Analysis•Determine levels of natural or components
minerals, acids, sugars•Determine markers of particular adulterants
Trace oligosaccharides – invert sugar Sorbitol – apple and pear juice
•Characteristic ratios Carbon Isotope Ratio – cane and corn Anthocyanin and Phenolic Fingerprints
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Current Authenticity Issues
• Pomegranate Juice
• Lemon Juice
• Coconut Water
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Pomegranate Juice
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Current Issues: Pomegranate Juice
0
0.1
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0.5
0.6
0 500 1000 1500 2000 2500 3000 3500
Potassium (mg/L)
Man
nito
l (g/
100m
L)
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Current Issues: Pomegranate Juice
0
0.1
0.2
0.3
0.4
0.5
0.6
0 0.1 0.2 0.3 0.4 0.5
Malic Acid (g/100 mL)
Sorb
itol (
g/10
0 m
L)
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Lemon Juice
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Current Issues: Lemon Juice
0
200
400
600
800
1000
1200
1400
-30 -25 -20 -15 -10
Citrate Carbon Isotope Ratio (o/oo)
Citr
ic/Is
ocitr
ic R
atio
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Current Issues: Lemon Juice
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0 0.5 1 1.5 2 2.5
Formol Value (meg/100mL)
Pota
ssiu
m (m
g/L)
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Coconut Water
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Current Issues: Coconut Water
0
1
2
3
4
5
6
7
8
-30 -25 -20 -15 -10
Carbon Stable Isotope Ratio (o/oo)
Sucr
ose
(g/1
00 m
L)
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Current Issues: Coconut Water
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
-30 -25 -20 -15 -10
Carbon Stable Isotope Ratio (o/oo)
Sorb
itol (
g/10
0 m
L)
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Current Issues: Coconut Water
0
500
1000
1500
2000
2500
3000
3500
4000
-30 -25 -20 -15 -10
Carbon Stable Isotope Ratio (o/oo)
Pota
ssiu
m (m
g/L)
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Tools For Coping
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• Provide Clear Specifications• Make Plant Visits and Audits• Require Traceability of Supplies• Periodic Qualification Analyses
Know Your Suppliers
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Attend Scientific and Trade Association Meetings
•Participate in Technical Committees•Have a drink in the bar with your
industry colleagues•This is where some of the best
information about what is really happening can be obtained
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AIJN Code of Practice
•The AIJN Code of Practice Committee has Compiled Compositional and Quality Data Ranges and Guide Values for more than 20 Fruit Juices
•The Code of Practice also Contains Texts of EU Regulations and Identity Standards
•WWW.AIJN.ORG
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IFU Analyses
•Compendium of Fruit Juice Analytical Methods Compiled by the IFU Commission on Methods of Analysis
•Contains 80 Validated Test Methods and 10 Method Reccomendations
•http://www.ifu-fruitjuice.com/ifu-methods
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www.kfl.com