|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5767301||1413193||2018||5 صفحه PDF||سفارش دهید||دانلود کنید|
- Hg++/MeHg+ speciation by photochemical vapor generation at 311Â nm vs. 254Â nm.
- Hg++ and MeHg+ averaged 0.67Â Â±Â 0.45 and 1.1Â Â±Â 1.3Â ngÂ mLâ1 in fish oil.
- Method validation by ICP-MS.
- Low LODs: 0.50Â ngÂ mLâ1 for Hg++ and 0.63Â ngÂ mLâ1 for MeHg+.
Fish oil supplement is becoming increasingly popular worldwide because of beneficial long-chain omega-3 polyunsaturated fatty acids. However, mercury (Hg) impurity causes considerable concern because of its toxicity and bioaccumulation in the food chain. In this work, Hg impurities were extracted from fish oil by liquid-liquid partitioning. The sample solution was then mixed with a reductant (0.4% anthranilic acid-20% formic acid) and sequentially exposed to 311 and 254Â nm UV radiation. The resulting Hg0 vapor was detected by atomic fluorescence spectrometry. Speciation was fulfilled by solving a set of two linear equations. Recovery of MeHg+ was 73%; total Hg was validated by ICP-MS. This method achieved 0.50 and 0.63Â ngÂ mLâ1 limits of detection for Hg++ and MeHg+, respectively. Average Hg++ and MeHg+ contents in fish oil samples (nÂ =Â 38), 0.67Â Â±Â 0.45 and 1.1Â Â±Â 1.3Â ngÂ mLâ1, respectively, were 2-3 orders of magnitude lower than those in fish.
Journal: Food Control - Volume 84, February 2018, Pages 221-225