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蔬菜种植过程中降低农药残留的方法探讨 总被引：1，自引：0，他引：1
阐述了农药残留对人体的危害.针对当前蔬菜农药残留的现状和存在的安全问题,结合导致农药残留的根本原因进行分析,探讨了蔬菜种植过程中减少农药残留的技术措施. 相似文献
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减少蔬菜污染提高蔬菜品质的技术 总被引：1，自引：0，他引：1
蔬菜生产使用的化学农药,导致蔬菜中农药残留过高,严重危害了人们的身体健康.而在低温溶氧调频状态下,设计制作的太阳能蔬菜杀菌器是利用太阳能电池板提供电能,通过生物、物理、计算机等技术,进行电子杀虫、物理灭菌,补充蔬菜生长需要多种光照.太阳能蔬菜杀菌器可替代化学农药,提高蔬菜产量,改善蔬菜品质,生产无农药残留的绿色、优质蔬菜. 相似文献
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蔬菜生产使用的化学农药，导致蔬菜中农药残留过高，严重危害了人们的身体健康。而在低温溶氧调频状态下，设计制作的太阳能蔬菜杀菌器是利用太阳能电池板提供电能，通过生物、物理、计算机等技术。进行电子杀虫、物理灭菌，补充蔬菜生长需要多种光照。太阳能蔬菜杀菌器可替代化学农药，提高蔬菜产量，改善蔬菜品质，生产无农药残留的绿色、优质蔬菜。 相似文献
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利用气相色谱法检测了应用毒死蜱喷雾防治松突圆蚧后,林下土壤中药后当天及1 d、3 d7、d、14 d2、8 d的残留量,结果表明,该药在林下土壤中30 d内的残留量较高,降解速度慢,28 d时最高降解率为89.24%,平均半衰期为11.48 d。 相似文献
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Dr. M. Häfner 《Journal of pest science》1978,51(4):49-57
In horticultural soils, pentachloronitrobenzene (PCNB, common name: quintozene) can be metabolized either by reduction of the nitrogroup to pentachloroaniline (PCA) or — formally regarded — by nucleophilic exchange of the nitro — against the methylthio-group to methylthiopentachlorobenzene (MTPCB). Formation of MTPCB from PCA in horticultural soils can be excluded.The residues of the metabolite MTPCB in horticultural soils in the period immediately following the date of application of PCNB containing pesticides can be in the same range as the residues of the metabolite PCA or they can exceed the PCA-residues. Then, in comparison with the PCA-residues the MTPCB-residues in horticultural soils disappear more rapid than the PCA-residues. The quotient MTPCB/PCA becomes the smaller the longer removes the date of sample-taking from the date of application of PCNB containing pesticides. These results indicate that MTPCB is not so persistent as PCA in horticultural soils. This statement can be proofed furthermore by the PCA-and MTPCB-residues measured in 1975/1976 in horticultural soils originating from areas to which Brassicol®, a PCNB containing pesticide, was applicated before or up to 1972: the MTPCB-residues are generally 1/10 or less of the PCA-residues.Leaves or root vegetables grown as following cultures of lettuce on fields to which Brassicol® was immediately applicated before cultivation of lettuce contain during a certain period HCB (hexachlorobenzene)-, PCNB-, PCA-and MTPCB-residues. Usually, in leaves vegetables, the MTPCB-residues are smaller than the PCA-residues of the same samples. However, in root vegetables, the MTPCB-residues of the same samples can be in the same range as the PCA-residues or can exceed the PCA-residues.Leaves or root vegetables grown in different periods in 1974 to 1976 on horticultural soils to which Brassicol® was applicated before or up to 1972 usually contain no detectable or only small residues (in the range of 0,02 ppm) of MTPCB. Fruit vegetables grown on these soils does not contain either HCB-, nor PCNB- nor PCA, nor MTPCB-residues in detectable quantities.
Mit 2 Abbildungen 相似文献
Mit 2 Abbildungen 相似文献
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采用固相萃取-液相色谱串联质谱仪,建立枸杞中9种有机磷农药的快速测定方法。样品经乙腈提取,过Carbon/NH2固相萃取柱净化,氮吹至干,残留物用乙腈-水（3：2,V/V）溶解后测定,采用正离子扫描方式进行仪器方法学研究,确定监测离子对,进行SRM模式定性定量分析。该方法的检出限（LOD）为0.12～9.8μg/L;在10～200μg/L范围内线性关系良好（r〉0.9961）。在20～100μg/L的添加水平上,9种有机磷农药的平均回收率在80.7%～122.4%之间,相对标准偏差（RSD）为2.75%～14.7%。该方法操作简单,灵敏度高,可用于枸杞中9种有机磷农残的测定。 相似文献
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M. Häfner 《Journal of pest science》1976,49(12):177-183
Studies on the degradation of quintozene in vegetables and soils of gardeners
In the Federal Republic of Germany the application of quintozene containing pesticides was allowed at vegetables and flowers with some restrictions until 1973. This is the reason why now, in 1976, soils of gardeners and green-houses are contaminated with quintozene (PCNB), hexachlorobenzene (HCB) and pentachloroaniline (PCA). PCA residues are generally found in higher concentrations than the HCB and PCNB residues. Plants, especially leaves and root vegetables, which are cultivated on those soils can be contaminated with HCB, PCNB and PCA residues originating from the soil. The extent of PCA-residues was unknown until now because PCA residues could not be measured by some known analytical methods. Therefore, PCA-tolerances could not yet be established. 相似文献
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为给科学制定产品质量标准提供依据,采用随机取样的方法,对我国广西壮族自治区罗汉果主产区永福县龙江乡、临桂县茶洞乡、龙胜县三门乡和融安县雅瑶乡的罗汉果上农药残留情况进行了调查,并采用日本岛津GC-14B气相色谱仪对其残留农药六六六(α-BHC、β-BHC、γ-BHC、δ-BHC)、DDT(P.P-DDT、O.P-DDT、P.P-DDE、P.P-DDD)、艾氏剂(Aldrin)的含量进行了测定与分析,并参照我国中药材有机氯六六六、DDT、艾氏剂的残留量的相关标准,制定了我国罗汉果有机氯农药残留的限量标准。 相似文献
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OHIRA Tatsuro 《中国林业科技(英文版)》2006,5(3):13-16
Volatile organic chemicals (VOCs) are emitted as gases from certain solids or liquids, which include a variety of chemicals, some of them may have short- and long- term adverse health effects. Concentrations of many VOCs are consistently higher indoors (up to ten times higher) than outdoors. VOCs are emitted by a wide array of products numbering in the thousands, for example: paints and lacquers, paint strippers, cleaning supplies, pesticides, building materials and furnishings, office equi… 相似文献
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建立了毛细管气相色谱法测定蔬菜水果中28种有机磷农药残留量的分析方法,对实验水果蔬菜经乙腈提取,盐析,浓缩液丙酮溶解定容,采用ENVI-Carb固相萃取小柱净化,以10%丙酮-正己烷混合液洗脱,洗脱液采用DB-17毛细管柱和火焰光度检测器测定,一次进样可对蔬菜水果中28种有机磷农药进行检测,并且通过采用DB-1毛细管柱和氮磷检测器进行确证实验,准确度高。结果表明:样品加标平均回收率在72.8%～102.3%之间,相对标准偏差(RSD)在2.1%～6.6%之间,检出限(LOD)在0.017～0.200mg/kg之间。实验表明,该检测方法简便、快速、灵敏、准确,各项技术指标均能满足农药残留检测的要求,适合蔬菜水果中有机磷农药多残留的日常检验。 相似文献