齐齐哈尔市马铃薯及制品中化学污染物检测结果分析

Analysis on detection results of chemical pollutants in potatoes and their products in Qiqihar City

目的了解齐齐哈尔市特色食品马铃薯及制品中有害化学物质污染情况。方法2022年1—9月采集齐齐哈尔市市售200件样品,包括140件马铃薯制品和60件马铃薯鲜薯,其中农药残留采用分散固相萃取(quick easy cheap effective rugged safty,QuEChERS)联合超高效液相色谱串联质谱(ultra high performance liquid chromatography-tandem mass spectrometry,UPLCMS/MS)和气相色谱质谱联用法(gaschromatography-mass spectrometry,GC-MS)检测,金属与类金属元素采用微波消解-电感耦合等离子体质谱法检测,二氧化硫采用滴定法检测,按照相关食品安全国家标准对检测结果进行评价。结果鲜薯中检出11种农药残留,马铃薯制品中未检出农药残留。鲜薯中检出24种金属与类金属元素,锡、汞未检出。鲜薯中检出二氧化硫2份,检出率为3.3%;超过国家标准限值2份,超标率为3.3%。马铃薯制品中检出二氧化硫19份,检出率为13.6%;超过国家标准限值8份,超标率为5.7%。结论鲜薯污染主要在储藏保存过程引入,马铃薯制品污染主要在生产过程使用添加剂所致,建议政府部门加强监管。

Objective To understand the pollution situation of harmful chemical substances in potatoes and their products,a specialty food in Qiqihaer City.Methods Collected 200 samples from January to September 2022,among which pesticide residues detected by quick easy cheap effective rugged safty(QuEChERS)-ultra high performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)method and QuEChERS-gaschromatography-mass spectrometry(GC-MS)method,metals and metalloids detected by microwave digestion-inductively coupled plasma-mass spectrometry,and sulfur dioxide detected by titration method.The detection results were evaluated by relevant national food safety standards.Results Totally 11 pesticide residues were detected in fresh potatoes,and no pesticide residues were detected in potato products.24 metal and metalloid elements were detected in fresh potatoes,while tin and mercury were not detected.Two fresh potatoes detected sulfur dioxide with a detection rate of 3.3%,and two samples exceeded the national standard limit with an exceeding rate of 3.3%.19 out of 140 potato products were found to contain sulfur dioxide,with a detection rate of 13.6%.8 cases exceeded the national standard limit,with a exceedance rate of 5.7%.Conclusion Fresh potato contamination was mainly introduced during storage and preservation,while the pollution of potato products was mainly caused by the use of additives in the production process.It is recommended that government departments strengthen supervision.