Rezaei Mohammad, Shariatifar Nabi, Shoeibi Shahram, Amir Ahmadi Maryam, Jahed Khaniki Gholamreza
Department of Environmental Health Engineering, School of PublicHealth, Tehran University of Medical Sciences, Tehran, Iran.
Food and Drug Laboratory Research Center, Food and Drug Organization, MOH & ME, Tehran, Iran.
Iran J Pharm Res. 2017 Summer;16(3):1048-1058.
Food safety has a direct impact on human health and as such is a growing concern worldwide. Presence of harmful pesticide residue in food is a serious cause for concern among consumers so it is important to monitor levels of pesticides in foods. The aim of this study was simultaneous determination of concentrations of 58 pesticides in 40 wheat flour samples collected from Tehran market in January, 2014. The city under study (Tehran) was divided into five districts and samples were collected independently from each district and sourced from different bakeries (n=40). A gas chromatography-mass spectrometry single quadrupole selected ion monitoring «GC/MS-SQ-SIM» method was used to quantify residue of 58 pesticides in the wheat flour samples. Four of the 40 samples showed contamination with Malathion (2 samples: 50.96 ± 11.38 and 62.088 ± 11.38 ppb) and 2, 4-DDE (2 samples: 19.88±15.24 and 13.7 ± 15.24 ppb). that had levels below MRLs of these pesticides in Iran. Averages of recovery of pesticides at 6 concentration levels were in the range of 81.61-118.41%. The method was proven as repeatable with RSDr in the range of 6.5-29.45% for all concentration levels. The limit of quantification for 37 of the tested pesticides was calculated as 15 ppb and for the other 21 tested pesticides, the concentration was 25 ppb. In summary, results of these tests suggested that the wheat flour consumed in Tehran, was within safety limits in terms of levels of pesticide residues.
食品安全直接影响人类健康，因此在全球范围内日益受到关注。食品中有害农药残留的存在是消费者严重关切的问题，所以监测食品中的农药含量很重要。本研究的目的是同时测定2014年1月从德黑兰市场采集的40个小麦粉样品中58种农药的浓度。所研究的城市（德黑兰）分为五个区，样品从每个区独立采集，来源不同面包店（n = 40）。采用气相色谱 - 质谱单四极杆选择离子监测（GC/MS - SQ - SIM）方法对小麦粉样品中58种农药的残留进行定量。40个样品中有4个显示受到马拉硫磷（2个样品：50.96±11.38和62.088±11.38 ppb）和2,4 - DDE（2个样品：19.88±15.24和13.7±15.24 ppb）污染，其含量低于伊朗这些农药的最大残留限量。6个浓度水平下农药的平均回收率在81.61 - 118.41%范围内。该方法被证明具有可重复性，所有浓度水平下的相对标准偏差（RSDr）在6.5 - 29.45%范围内。37种被测农药的定量限计算为15 ppb，其他21种被测农药的浓度为25 ppb。总之，这些测试结果表明，德黑兰消费的小麦粉在农药残留水平方面处于安全限度内。
