不同地区秋葵籽铅含量的测定

Determination of Lead in Okra Seed from Different Areas

重金属铅含量是评价秋葵籽质量的一项重要指标,为了考察不同地区秋葵籽中的铅含量,为制备秋葵籽油做准备,试验采集了5个不同地区的秋葵籽样本进行微波消解,采用电感耦合等离子体质谱仪测定了铅含量。结果表明,不同地区秋葵籽产品所检测出的铅含量有较大差异。5个检测样本中,铅含量最高的是云南昭通的,含量高达1.02 mg/kg;其次为浙江金华的,铅含量为0.157 mg/kg;其余3个样本中铅含量较少,分别为0.057、0.069、0.083 mg/kg。国家标准GB2762-2017中规定铅含量为0.2 mg/kg,只有云南昭通的秋葵籽中铅含量超标。可见秋葵生长受生态环境影响较明显,控制和降低秋葵产品中铅含量,选择无污染的土壤种植环境是必要的。

Lead content was an important index to evaluate the quality of okra.To study the lead content of okra seed in different areas and prepare for the okra seed oil,lead in okra seeds from five different areas were studied by microwave digestion and ICP-MS.The results showed that there were some bigger difference of the detection of lead in okra seed from different areas.Sample 1 whose content lead up to 1.02 mg/kg had the highest level of lead in the five test samples.The second was sample 2 with lead content of 0.157 mg/kg.The other samples contained less lead,0.057,0.069 and 0.083 mg/kg,respectively.According to the national standard GB 2762-2017,the lead content is 0.2 mg/kg,and only the okra seeds in Zhaotong,Yunnan province contain excessive lead.The growth of okra is obviously affected by the ecological environment.It is necessary to plant okra in non-polluted soil and collect it in non-polluted soil environment to control and reduce the content of lead in okra products.