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再加工农产品中有害化学物质MRLs制订与思考 总被引:4,自引:0,他引:4
随着农产品出口水平的提高和消费模式、生活方式的改变,再加工食品在出口和消费食品中的比重越来越大,有关再加工食品的质量标准的制订也显得越来越重要。就食品标准的制订过程,再加工因子对食品中有害物质MRLs制订的影响以及现行相关食品标准存在的问题进行分析与探讨,对标准的修订和加工企业有着积极的现实意义。 相似文献
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食品安全的科学内涵分析与可持续控制体系的建设 总被引:8,自引:0,他引:8
从3个角度分析食品安全的科学内涵构成即食品的质量安全、营养平衡与可持续供给安全(数量安全),认为该构成具有一定的阶段性、时代性和发展性。同时对食品安全可持续控制体系从以下6个方面提出体系完善和控制的建议:(1)食品安全的质量标准和法律法规建设;(2)完善食品的源头生产、流通、加工和销售控制体系;(3)完善食品市场准入、标识、追踪和召回制度;(4)独立的质量监督与检测体系;(5)消费者的科学消费和媒体的正面宣传引导;(6)关注农村与城市社区食品安全建设。 相似文献
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以菠菜为材料,在大棚栽培条件下研究不同量的海藻酸铈配合物及壳聚糖铈配合物对菠菜中毒死蜱残留动态和品质的影响。结果表明:叶面喷施不同量的海藻酸及壳聚糖铈配合物都可不同程度地降解菠菜中毒死蜱残留量,其中3.3mL/L海藻酸铈配合物可使菠菜中毒死蜱的降解率达到59.98%,10mL/L壳聚糖铈配合物可使毒死蜱的降解率达45.76%。叶面喷施这两种配合物对菠菜品质没有明显负影响,在某种程度上还能改善菠菜品质。实验表明,在菠菜生产中,将海藻酸及壳聚糖铈的配合物作为去除菠菜中毒死蜱残留的降解剂是可行的。 相似文献
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几种常用杀虫剂在洋葱上的残留降解动态 总被引:7,自引:1,他引:6
研究了毒死蜱、敌百虫和氯氰菊酯不同施药方法在洋葱上的残留降解动态。结果表明,毒死蜱喷雾在洋葱上的残留期较长,而采用药液灌根法施药,其残留期较短,残留量较少,即使在施药后第1d取样检测,残留量仍远远低于国家规定标准;敌百虫采用灌根法施药,在葱头中的残留量很低,施药后第1d取样检测,其残留量远远低于国家规定标准,这2种药剂可以作为防治地下害虫的良好杀虫剂。氯氰菊酯采用喷雾法施药,即使在施药后第1d,也检测不到农药残留,因此,是一种良好的喷雾用杀虫剂。 相似文献
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在三种氮肥水平处理下,将三个烟草品种连续种植三年,以期建立氮肥水平和烤烟叶片中尼古丁及亚硝基降烟碱(NNN)含量的任一关系。我们发现,一般地氮肥水平愈高,就会导致生物碱和NNN的水平愈高。收获前,试图阻止生物碱的亚硝化作用,大 相似文献
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Degradation of Extraction from Seaweed and Its Complex with Rare Earths for Organophosphorous Pesticides 总被引:1,自引:0,他引:1
On the basis of several experiments carried out in China, it was proved that both seaweed liquid fertilizer and rare earth (RE) could promote the growth of crops and increase their yield. The effects of extraction from seaweed and its complex with RE on the degradation of organophosphorous pesticides and the yield of vegetables were investigated. The resuits showed that the extract and its complex with RE could degrade organophosphorous pesticides in neutral solvent. The residues of the pesticides treated by the extract decreased by 96.88 %, 52.30%, 49.52%, and 22.88 %, respectively, for chlorpyrifos, dichlorvos, omethoate, and dimethoate, and those by the complex decreased by 95.99%, 54.23%, 48.79%, and 25.66%, respectively, when compared with the control. The residues of chlorpyrifos and dimethoate in spinach sprayed with the complex were decreased by 90.64% and 76.56%, respectively, compared with those in spinach from control plots when the interval between spraying and sampling was 8 d. The fresh weight of brassica chinensis and cabbage increased by 28.62% and 18.72%, and their dry weight increased by 44.49% and 14.74%, respectively, compared with those of the controls. The chlorpyrifos and dimethoate residues in brasscia chinese were decreased by 36.36% and 50.00%, respectively, and their rate of decrease in cabbage was 40.00% and 75.00%, respectively, on 5th day after spraying with the complex, when compared with those in the vegetable from control. These results suggest that this complex can increase the agricultural productivity and reduce the use of pesticide residues in the production of vegetables. 相似文献
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