Introduction
Biogenic amines are basic nitrogenous compounds formed because of microbial decarboxylation of amino acid. Large amounts of biogenic amine can cause allergy like food poisoning, known as scromboid poisoning, which can lead to death in very sensitive subjects. Histamine content increases with the progress of fish decomposition at processing plants or even after catching. Tyramine is reported to cause food intoxication commonly associated with ripened cheeses, affecting health due to its capacity to potentiate sympathetic cardiovascular activity by releasing noradrenalin, called “cheese reaction”.
Decarboxylation of amino acid
Biogenic amines are decarboxylation products of amino acids and are formed during fermentation (e.g., cheese ripening and wine fermentation) and decomposition of protein, usually fish. These biogenic amines include Histamine, Tyramine, Cadaverine, Putrecine and related metabolites.
Decarboxylation of amino acid occurs by the removal of -carboxyl group to give corresponding amine.
Materials and methods
Standard Histamine and Tyramine were purchased from Sigma. Methanol of HPLC grade was supplied from Merck.
Apparatus and chromatographic condition
Quantitative analysis was performed by using Agilent HPLC system
by using Zorbax Eclipse amino acid column (4.6 x 150mm, 3.5µ) and methanol and phosphate buffer as mobile phase. Fluorescence Detector with excitation wavelength at 335nm, emission wavelength at 440nm.
Fish samples preparation for biogenic amine extraction
10g of fish sample was extracted with 10ml 6% perchloric acid and was then centrifuged for 10 minutes at 3000 rpm. The resulting supernatant was then filtered and finally injected into the system.
Results and Discussion
Linearity
Calibration curve for histamine
Calibration curve for Tyramine
Chromatogram of 5mg/kg mix standard
Recovery at 5mg/kg
Recovery at 20mg/kg
Precision and accuracy at 5mg/kg
|
Recovery 1 (mg/kg) |
Recovery 2 (mg/kg) |
Recovery 3 (mg/kg) |
Average Recovery % |
RSD |
Histamine |
4.13 |
3.68 |
3.78 |
77.27 |
6.13 |
Tyramine |
4.58 |
3.94 |
4.11 |
84.32 |
7.91 |
Precision and accuracy at 20 mg/kg
|
Recovery 1 (mg/kg) |
Recovery 2 (mg/kg) |
Recovery 3 (mg/kg) |
Average Recovery % |
RSD |
Histamine |
17.47 |
17.85 |
17.87 |
88.68 |
1.27 |
Tyramine |
20.21 |
19.02 |
18.12 |
95.59 |
5.49 |
Conclusion
The present study validated a rapid, sensitive and reproducible method using fluorescence detector to determine histamine and Tyramine concentration in tuna fish samples. Based on the results in this study, OPA derivatization can be considered advantageous because it reduces the time of analysis and allows excellent recoveries and repeatability and could be useful in fish processing plants for routine analysis.
Contributed by: Shraboni Palley, Rituparna Mukherjee
Chief Operation, FAMD, Tata Steel Limited..
Sr. General Manager,, Emirates Trading Agency L.L.C..
Mines Manager, Hindustan Zinc Limited, a Vedanta Company.
General Manager, Stevin Rock L.L.C..
Executive Vice President (Works),, DCW Limited.
AVP – Coal Quality & Sales Compliance Head,, PT Indo Tambangraya Megah Tbk (BANPU).
Laboratory Head, MMX.
Shipping Administrator, Mount Gibson Iron Limited.
Senior Director – Asia Pacific Iron Ore Sales,, Cliffs Natural Resources Pty Ltd..
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