厦门市市售土笋冻中铬的污染状况及来源探讨

Study on the contamination and source of chromium in the sea worm jelly in Xiamen

目的了解厦门市市售土笋冻中铬的污染状况,探讨土笋冻中铬的污染来源及预防措施。方法 2012—2014年在厦门市各采样点随机抽取土笋冻样品81份,虫体样品9份,从宁德地区滩涂海域采集可口革囊星虫、淤泥、海水等环境样品6份,依照GB/T 5009.123—2003《食品中铬的测定》中推荐的石墨炉原子吸收光谱法测定样品中铬的含量。结果 81份土笋冻样品中铬含量范围在0.024～17.6 mg/kg之间,平均值为2.17 mg/kg,中位数为1.33 mg/kg,超标率为42.0%（34/81）。添加明胶加工后导致土笋冻中铬含量从1.33 mg/kg升至5.35 mg/kg。从宁德地区滩涂海域采集的星虫、淤泥、海水样品中铬的含量范围分别为2.67～2.70、68.5～77.9和0.038～0.046 mg/kg。结论厦门市市售土笋冻样品中铬的污染情况较为严重,监管部门须加强对土笋冻的原料、加工、销售过程的监控,保证食品安全。

Objective To investigate the chromium contamination of sea worm jelly in Xiamen market and to propose the preventive measures against chromium contamination of sea worm jelly based on analysis of the source.Methods A total of 81 samples of sea worm jelly and 9 samples of polypide were collected in Xiamen market from 2012-2014 and 6 samples of Phascolosoma esculenta,silt and seawater were collected from Ningde.The concentrations of Cr in the samples were determined by graphite furnace atomic absorption spectrometry according to GB/T 5009.123-2003.Results The chromium content of 81 samples were 0.024-17.6 mg/kg,the average content was 2.17 mg/kg,and the median was 1.33 mg/kg.The qualified rate was 58.0%.The concentration of Cr in sea worm jelly was changed from 1.33 to 5.35 mg/kg after adding gelatin.The contents of Cr in the Phascolosoma esculenta,silt and seawater from Ningde area were 2.67-2.70,68.5-77.9,0.038-0.046 mg/kg,respectively.Conclusion The chromium contamination in the sea worm jelly was severely in Xiamen.Supervision and monitoring on the raw materials,production,sales of the sea worm jelly should be strengthened to ensure food safety.