The occurrence of semicarbazide in the meat and shell of Bangladeshi fresh-water shrimp.
The occurrence of semicarbazide in the meat and shell of Bangladeshi fresh-water shrimp.
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DOI：
10.1016/j.foodchem.2011.11.088
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发表时间：
2013-02
期刊：
影响因子：
8.8
通讯作者：
R. McCracken;Bob Hanna;D. Ennis;L. Cantley;Dermot Faulkner;D. Glenn Kennedy
中科院分区：
文献类型：
--
作者：
R. McCracken;Bob Hanna;D. Ennis;L. Cantley;Dermot Faulkner;D. Glenn Kennedy
有证据表明，氨基脲(SEM)是禁用的呋喃西林的标志物，也可以来自其他无关的来源。最近，在实验室决定对肉类和外骨骼进行联合检测后，比利时拒绝了54批孟加拉国淡水虾(罗氏沼虾)。为了研究野生对虾中可能自然存在的扫描电子显微镜，从孟加拉国各地的29个地点收集并分析了样本。扫描电子显微镜(1μg/kg)在65%的肉类样品中检测到∼。然而，外骨骼中的扫描电子显微镜浓度大约高出100倍，并且与采样位置无关，强烈表明是自然发生的。在肉类中，大部分扫描电子显微镜是表面相关的。当虾去壳时，一些表皮层(合成新的外骨骼)留在壳里，一些留在肉里--导致虾表面天然扫描电子显微镜的不同程度。这对扫描电子显微镜的使用和用于控制硝基呋喃使用的分析策略有影响。
There is evidence that semicarbazide (SEM), a marker for the banned nitrofuran nitrofurazone, can arise from other, unrelated sources. Recently, Belgium rejected 54 consignments of Bangladeshi freshwater shrimp (Macrobrachium rosenbergii), following a laboratory decision to test meat and exoskeleton combined. To study the possible natural occurrence of SEM in wild shrimp, samples were collected and analysed from 29 sites across Bangladesh. SEM (<1.0μg/kg) was detected in ∼65% of meat samples. However, SEM concentrations were approximately 100 times higher in the exoskeleton, and were unrelated to sampling location, strongly suggesting natural occurrence. In meat, most SEM was surface-associated. When the shrimp was shelled, some of the epidermal layer (which synthesises new exoskeleton) remained with the shell and some remained with the meat – leading to differing levels of natural SEM on the shrimp surface. This has implications for the use of SEM and the analytical strategy used to control nitrofuran use.