Lead and Cadmium Contamination in Seeds and Oils of Brassica napus L and Carthamus tinctorius Grown in Isfahan Province/Iran
Lead and Cadmium Contamination in Seeds and Oils of Brassica napus L and Carthamus tinctorius Grown in Isfahan Province/Iran
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发表时间：
2015-01
影响因子：
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通讯作者：
A. Palizban;A. Badii;G. Asghari;Hossein Mardani-Nafchi
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文献类型：
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作者：
A. Palizban;A. Badii;G. Asghari;Hossein Mardani-Nafchi
背景：铅和镉是有毒重金属，是食品和食用油中的主要污染物。本研究的目的是调查铅和镉污染的种子和提取油的甘蓝型油菜L和红花种植在工业基地（伊斯法罕Zobe Ahan）附近的伊斯法罕省/伊朗。方法：本研究采用B. napus和C.从养殖场随机抽样。种子油由工厂提供，并在我们的实验室中提取。用装有塞曼效应的GF-AA光谱仪测定了硝酸消化洗过和未洗过的两个系列的种子和油中的元素含量。结果：在所有样品中均发现镉低于方法检测限（MDL，0.04 µg/L）。除洗过的B外，所有种子和油中均发现铅污染。油菜籽铅污染水平最高的是C。tinctorius和B.甘蓝型油菜中的含量分别为24.74 μg/L和11.85 μg/L。未洗油的铅含量显著高于洗油（P<0.05）。结论：镉污染率较铅污染率低。未清洗的种子油中的铅污染物高于清洗的种子油，表明污染物应该已经通过空气转移。虽然这些观察结果表明食用油的污染水平低于毒性水平，但长期接触可能会导致潜在的健康风险。
Background: Lead and cadmium are toxic heavy metals found as major contaminants in food products and edible oils. The aims of this study were to investigate the lead and cadmium contaminations in seeds and extracted oils from Brassica napus L and Carthamus tinctorius grown in the vicinity of industrial sites (Isfahan Zobe Ahan) near Isfahan province/Iran. Methods: In this study, the seeds of B. napus and C. tinctorius were randomly sampled from the farms. The oils of seeds were provided by factory and extracted as well in our laboratory. The two series of washed and unwashed seeds digested with nitric acid and the amount of elements in seeds and oils were measured using GF-AA spectrometer equipped with Zeeman Effect. Results: Cadmium was found in all samples below the Method Detection Limit (MDL, 0.04 µg/L). Lead contaminations were found in all seeds and oils except washed B. napus seeds. The highest levels of lead contaminations were observed in oils of C. tinctorius and B. napus with the amount of 24.74 µg/L and 11.85 µg/L, respectively. The level of lead in unwashed seed oils were significantly higher than washed seed oils (P<0.05). Conclusions: The contamination rate of cadmium compared with lead was very low. The higher lead contaminations in unwashed seeds oils compared with washed seeds oils indicated that the contaminant should have been be transferred through the air. Although these observations suggest that the levels of contaminations in edible oils are below the toxic level, long-term exposure may lead to potential health risks.