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VITAMIN B STABILITY OF DRIED BEE VITAMIN B STABILITY OF DRIED BEE POLLEN DURING STORAGEPOLLEN DURING STORAGE
Prof. Assoc. Ligia Bicudo de Almeida Muradian
Food and Nutrition Department -Pharmaceutical Science SchoolUniversity of São Paulo, Brazil
Countries which has bee pollen regulation:
• Argentina• Armenia• Bulgaria• Brazil• China• Cuba
• Poland • Russia• Switzerland• Turkey• Uruguay
BRAZIL
Production of 200 ton/year
Bee pollen production
Collect...............
Freeze
Dehydration..............................................
Cleaning
Package.......
Bee pollen collect
Vitamins studied:
(water-soluble vitamins of the B complex)
Vitamin B1 (Thiamin)deficiency = beriberi(neurological and cardiovascular disease)
Vitamin B2 (Riboflavin)deficiency = ariboflavinosis
(include cracked and red lips, inflammation of the lining of mouth)
Vitamins studied:
(water-soluble vitamins of the B complex)
Vitamin B3 (PP or niacin)deficiency = pellagra(diarrhea, dermatitis and dementia)
Vitamin B6 (Piridoxine)
3 isomers
Nicotinic acid Nicotinamide
Piridoxine Piridoxal
Piridoxamine
Material and Methods
Material
07 Batches of bee pollen from Sao Paulo, Brazil were collected using 15 bee hives (Apis mellifera) and were kept at room temperature (with and without light exposure) an in freezer
Methods
Simultaneous extraction (Moreschi, 2006; Presoto and Almeida-Muradian 2008)
HPLC:
Vitamin B1 (pre-column reaction): Mobile phase: phosfate buffer pH 7.2 and dimethylformamide; Column: C18; fluorescence detection (Ex 368 nm; Em 440 nm)
Vitamin B2: Mobile phase: phosfate buffer pH 7.2 and dimethylformamide; Column: C18; fluorescence detection (Ex 450 nm; Em 530 nm)
Vitamin PP (post-column reaction): phosfate buffer with hidrogen peroxide and copper sulphate, cobre; Column: C18 ; fluorescence detection (Ex 322nm; Em 380 nm)
Vitamina B6: phosfate buffer with pH 2.5 with ion par and acetonitrile: Column: C18; fluorescence detection (Ex 296nm; Em 390 nm)
Chromatograms
B1
B2
PP
Standards Samples
Chromatograms
B6Standard
Sample
Results
Vitamin B1
0.50
0.60
0.70
0.80
inicial 4 meses 8 meses 12 mesesMonths
Luz Escuro Freezer Teor inicial
Light
mg/100g
Light Dark Initial concentration
Stable
Initial
Results
mg/100g
Vitamina B2
1,2
1,7
2,2
2,7
inicial 4 meses 8 meses 12 meses
Luz Escuro Freezer Teor inicial
a
ab
a
a
a
a
a a
a
Initial monthsLight Dark Initial concentration
28% lost
Still vitamin source
Vitamin
Results
Vitamina PP
3
5
7
9
11
13
inicial 4 meses 8 meses 12 meses
Luz Escuro Freezer Teor inicial
mg/100g
aa
a
Vitamin
Initial 12 months
Light Dark Initial concentration
60% lost
Vitamina B6
-0,4
-0,15
0,1
0,35
inicial 4 meses 8 meses 12 meses
Luz Escuro Freezer Teor inicial
Results
mg/100g
aa
a
Vitamin
Initial 12 months
Light Dark Initial concentration
total lost
Conclusion
• After one year the vitamins were:
• B1 remain
• B2 28% lost
• PP 60% lost
• B6 100% lost
• The vitamin loose depends more on thetime of storage than the conditions of storage.
Thank you all...
• Vanilda Arruda (PhD student, USP)• Aline Pereira (Undergraduate student, USP)• Ortrud Monika Barth (PhD, FIOCRUZ)• Alex Freitas (MS student, FIOCRUZ)• Fabricia Soriane (PRONATU)