Effect of copper on the degradation of pesticides cypermethrin and cyhalothrin

共存的铜( Cu )的影响在土壤的 pesticidespyrethroid 氯氰菊酯和 cyhalothrin 的降级和在有铜离子的增加的杀虫剂的水系统 werestudied.Serial 集中的相片降级上的离子在 thes 油被刺并且为时间的一个常规时期孵化了，从土壤的摘录的分析用气体色层法( GC )被执行。在水系统的 pyrethroids 的相片降级在紫外照耀下面被进行。杀虫剂降级上的 Cu^(2+) 的效果与降级的半生活(t_(0.5 )) 被测量。在在土壤和 Cu 增加的 pyrethroid 杀虫剂的降级之间的一道负相关被观察，这被发现。但是 Cu^(2+) 能水里的 pyrethroids 的 acceleratephotodegradation。为为氯氰菊酯从 6.7 ～ 6.8 dwhile 扩大的 cyhalothrin 的 t_(0.5 ) 在土壤与铜离子的存在从 8.1 ～ 10.9 d 延长了。作为 forphotodegradation，为 cyhalothrin 的 t_(0.5 ) 从 173.3 ～ 115.5 min 减少了，为到 99.0 min.The 的氯氰菊酯 from115.5，结果建议铜由影响微生物的活动影响了杀虫剂 ins 油的降级。然而，它在水系统有催化剂趋势 forphotodegradation。为在土壤的 pyrethroid 异构体的降级效率的差别也被观察。铜能显然加速一些特殊异构体的降级。

Cytotoxicity of lambda-cyhalothrin on the macrophage cell line RAW 264.7

The wide use and wide-spectrum toxicity of synthetic pyrethroids (SPs) insecticides make them an emerging ecotoxicological concern. Some previous studies showed that SPs possessed cytotoxicity in some immune cells such as human lymphocytes and rat bone marrow. However, the cytotoxicity of SPs to macrophages, which are crucial to innate immunity, has not been explored. In the present report, we investigated a new pyrethroid insecticide, lambda-cyhalothrin (LCT), which may increase the generation of reactive oxygen species (ROS) and DNA damage levels and cause cytotoxicity in RAW 264.7 cells in dose- and time-dependent manners. The results for the first time implicated increased endogenous ROS and DNA damage as co-mediators of LCT-induced cytotoxicity in macrophages. Our results also suggested that macrophages were involved in synthetic pyrethroid-induced adverse immune effects. Considering the ubiquitous environmental presence of SPs, this study provided new information relative to the potential long-term physiological and immunological effects associated with chronic exposure to SPs. Hence, the potential immunotoxicity of SPs should be considered in assessing the safety of these compounds in sensitive environmental compartments.

Sensitive determination of fenpropathrin,cyhalothrin and deltamethrin in environmental water samples using multiwalled carbon nanotubes cartridge prior to HPLC

这篇论文用多围的碳 nanotubes (MWCNT ) 为 fenpropathrin， cyhalothrin 和 deltamethrin 的踪迹决心描述了一个新方法子弹。重要参数例如样品最适 PH，洗脱液和它的体积，取样流量，样品体积详细被调查。线性范围，检测极限，和精确(R.S.D ) 在 0.1 40 μ g L 的范围 ? 1， 1.3 4.3 ng L ? 1 和 2.3 2.8% 分别地。建议方法的表演与真实的水样品被验证，并且刺的恢复在范围 91.7 117.8% 分别地。试验性的结果证明建议方法是为在环境样品的如此的污染物质的常规分析的一种优秀选择。

绿茶中联苯菊酯和氯氟氰菊酯残留检测质量控制基体标准物质的研制

目的:制备一批绿茶中联苯菊酯和氯氟氰菊酯基体标准物质。方法:以绿茶为研究对象,通过喷洒联苯菊酯和氯氟氰菊酯,样品经粉碎、过筛、均质、装瓶,通过均匀性、稳定性检验后,由3家实验室联合定值确定量值,并进行不确定度评估。结果:绿茶中联苯菊酯和氯氟氰菊酯的量值分别为(0.185±0.0197),(0.207±0.0466)mg/kg,k=2,置信区间为95%。结论:研制出的绿茶中联苯菊酯和氯氟氰菊酯基体标准物质足够均匀,足够稳定,定值结果可靠。

Effect of an eco-friendly o/w emulsion stabilized with amphiphilic sodium alginate derivatives on lambda-cyhalothrin adsorption-desorption on natural soil minerals

The effects of amphiphilic O/W emulsions,stabilized by the alkyl polyglycoside(APG)or cholesterol-grafted sodium alginate(CSAD)/APG systems,on lambda-cyhalothrin adsorption/desorption mechanisms on natural soil minerals(i.e.,illite and kaolinite)were investigated.Sorption and desorption of lambda-cyhalothrin onto soil minerals was studied via batch equilibration to give insight into the adsorption equilibrium,kinetics,and thermodynamics of lambda-cyhalothrin adsorption onto minerals.The results indicate the following:(i)The adsorption processes for the APG system and CSAD/APG system include:rapid adsorption,slow adsorption,and adsorption equilibrium.The adsorption kinetics of pesticide on illite and kaolinite are in accordance with the Ho and McKay model,and the adsorption isotherm conforms to the Freundlich model.In addition,the adsorption processes of pesticide for the two systems on minerals were spontaneous and feasible(ΔG^0<0),endothermic(ΔH^0>0),and mainly involved chemical bonding(ΔH^0>60).(ii)The equilibrium adsorption percentages of the pesticide on illite for the APG system and CSAD/APG system were 42.4%and 64.8%,and the corresponding equilibrium adsorption percentages on kaolinite were 40.8%and 61.8%,respectively.Moreover,the pesticide adsorption rate K_(2-CSAD/APG)was faster than K_(2-APG),and its adsorption capacity K_(f-CSAD/APG )was greater than K_(f-APG).Meanwhile,the pesticide desorption K_(fd)in the CSAD/APG system was smaller than that in the APG system.As a result,this eco-friendly O/W emulsion based on amphiphilic sodium alginate derivatives might provide a green pesticide formulation,since it could reduce the amount of lambda-cyhalothrin entering aquatic systems to threaten non-target fish and invertebrate species.

高效氯氟氰菊酯与烯啶虫胺增效混配剂的筛选及其对小麦蚜虫的田间防治效果

为了延缓麦蚜抗药性和降低杀虫剂使用量,本研究筛选了具有增效作用的高效氯氟氰菊酯和烯啶虫胺的复配比例,并研究了增效复配剂对麦蚜的田间防治效果。浸叶法测定结果表明,高效氯氟氰菊酯对麦蚜的LC_(50)为25.01 mg/L,烯啶虫胺对麦蚜的LC_(50)为28.21 mg/L。通过最佳增效配比的筛选,发现高效氯氟氰菊酯和烯啶虫胺的有效成分比为1.3∶1、1∶1.1、1∶1.7、1∶10.2时,对麦蚜的毒效比分别为1.28、1.49、1.64、1.50,表现为增效作用。深入研究发现高效氯氟氰菊酯和烯啶虫胺的有效成分为1∶4.5、1∶7.5和1∶10.2的混配组合的共毒系数均显示了显著增效作用,其中,当高效氯氟氰菊酯与烯啶虫胺有效成分比为1∶7.5时,混配剂的LC_(50)为5.22 mg/L,共毒系数达到532.61。按有效成分比1∶7.5,将10%高效氯氟氰菊酯水乳剂与20%烯啶虫胺可溶液剂混用后,进行田间试验,结果表明,在药后1、3 d和7 d,混配剂的防效与高效氯氟氰菊酯单剂的防效无显著性差异,在药后1 d,混配剂的防效高于烯啶虫胺单剂的防效,在药后3 d及7 d,混剂与烯啶虫胺单剂的防效没有显著差异。混配剂的防效在药后7 d内不断上升,其中药后7 d防效达到92.98%。混配剂的使用可以达到对高效氯氟氰菊酯减量的目的,同时保证了对麦蚜的防效。

土壤中辛硫磷和高效氯氟氰菊酯残留量的高效液相色谱分析

从土壤中超声提取辛硫磷和高效氯氟氰菊酯,并采用高效液相色谱法检测其残留量.用乙腈-水(体积比4∶1)作为提取剂,对土壤样品进行超声萃取,提取液经弗罗里硅土小柱净化后,采用反相高效液相色谱法进行残留量测定.使用SynergiTMPolar-RP 80?(250 mm×4.6 mm, 4μm)色谱柱,以乙腈-水(体积比80∶20)为流动相,紫外检测波长为225 nm.结果表明:辛硫磷与高效氯氟氰菊酯的萃取率均高于92%.辛硫磷浓度在0.6~5.4μg/mL范围内和峰面积线性关系良好,线性回归方程A=25.108ρ+45.008,r=0.998 9;高效氯氟氰菊酯浓度在0.4~3.6μg/mL范围内与峰面积呈良好线性关系,线性回归方程A=48.835ρ+56.574,r=0.999 0.该方法简单、快速、准确度高、精密度好,能满足土壤中辛硫磷和高效氯氟氰菊酯残留量的检测要求.

Mutagenic and cytotoxic potential of Endosulfan and Lambda-cyhalothrin—In vitro study describing individual and combined effects of pesticides

Excessive use of pesticides poses increased risks to non target species including humans. In the developing countries, lack of proper awareness about the toxic potential of pesticides makes the farmer more vulnerable to pesticide linked toxicities, which could lead to diverse pathological conditions. The toxic potential of a pesticide could be determined by their ability to induce genetic mutations and cytotoxicity. Hence, determination of genetic mutation and cytotoxicity of each pesticide is unavoidable to legislate health and safety appraisal about pesticides. The objective of current investigation was to determine the genotoxic and cytotoxic potential of Endosulfan(EN) and Lambda-cyhalothrin(LC); individually and in combination. 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide(MTT) assay was utilized to determine cytotoxicity, while two mutant histidine dependent Salmonella strains(TA98, TA100) were used to determine the mutagenicity of EN and LC.Moreover, mutagenicity assay was conducted with and without S9 to evaluate the effects of metabolic activation on mutagenicity. Even though a dose dependent increase in the number of revertant colonies was detected with EN against both bacterial strains, a highly significant(p < 0.05) increase in the mutagenicity was detected in TA98 with S9. In comparison, data obtained from LC revealed less mutagenic potential than EN. Surprisingly,the non-mutagenic individual-concentrations of EN and LC showed dose dependent mutagenicity when combined. Combination of EN and LC synergistically induced mutagenicity both in TA98 and TA100. MTT assay spotlighted comparable dose dependent cytotoxicity effects of both pesticides. Interestingly, the combination of EN and LC produced increased reversion and cytotoxicity at lower doses as compared to each pesticide, concluding that pesticide exposure even at sub-lethal doses can produce cytotoxicity and genetic mutations, which could lead to carcinogenicity.

Effects of cyhalothrin on the transient outward potassium current in central neurons of Helicoverpa armigera

摘要在 Helicoverpa armigera 的中央神经原的短暂的外面的钾水流上的 cyhalothrin 的效果被使用补丁学习夹钳技术。结果在使用 cyhalothrin 前显示出那(10 ? 5 mmol/L ) ，激活潜力是近似 -40 mV 在这药的申请以后，激活潜力粗略地转移了 10 mV 到否定潜在的方向，隧道能因此更容易被激活。在 cyhalothrin 申请前后，当前的振幅的变化是不足道的。V1/2 的价值和然而， inactivation 的 V1/2 弄弯的曲线没显著地改变的激活的 k 显著地变化了。Inactivation 曲线显著地变了到一个否定方向，以便隧道的 inactivation 被赶快。可以在那里退出 cyhalothrin 通过激活潜力的规定和 IA 隧道的 inactivation 状态在提供 neurotoxicity 给神经系统的一个主要方法，这被显示。

Lambda-cyhalothrin disrupts the up-regulation effect of 17β-estradiol on post-synaptic density 95 protein expression via estrogen receptor α-dependent Akt pathway

Lambda-cyhalothrin(LCT),one of the type II pyrethroids,has been widely used throughout the world.The estrogenic effect of LCT to increase cell proliferation has been well established.However,whether the estrogenic effect of LCT will influence neurodevelopment has not been investigated.In addition,17β-Estradiol(E2)plays a crucial role in neurodevelopment and induces an increase in synaptic proteins.The post-synaptic density 95(PSD95)protein,which is involved in the development of the structure and function of new spines and localized with estrogen receptor α(ERα)at the post-synaptic density(PSD),was detected in our study by using hippocampal neuron cell line HT22.We found that LCT up-regulated PSD95 and ERα expression,estrogen receptor(ER)antagonist ICI182,780 and phosphatidylinositol-4;5-bisphosphate 3-kinase(PI3K)inhibitor LY294,002 blocked this effect.In addition,LCT disrupted the promotion effect of E2 on PSD95.To investigate whether the observed changes are caused by ERα-dependent signaling activation,we next detected the effects of LCT on the ERα-mediated PI3K-Protein kinase B(PKB/Akt)-eukaryotic initiation factor(e IF)4E-binding protein 1(4E-BP1)pathway.There existed an activation of Akt and the downstream factor 4E-BP1 after LCT treatment.In addition,LCT could disrupt the activation effect of E2 on the Akt pathway.However,no changes in c AMP response element-binding protein(CREB)activation and PSD95 messenger ribonucleic acid(m RNA)were observed.Our findings demonstrated that LCT could increase the PSD95 protein level via the ERα-dependent Akt pathway,and LCT might disrupt the up-regulation effect of E2 on PSD95 protein expression via this signaling pathway.

Pertussis toxin modulation of sodium channels in the central neurons of cyhalothrin-resistant and cyhalothrinsusceptible cotton bollworm, Helicoverpa armigera

百日咳毒素(PTX ) 禁止禁止的 heterotrimeric G 蛋白质(G 伪 _(i./o )) 的伪 - 子单元的激活并且调制电压门钠隧道，它可以是 pyrethroids 的主要目标之一。调查农业害虫抵抗的潜在的机制到 pyrethroid 杀虫药剂，我们在中央神经原在钠隧道上由 PTX 检验了调整第三—第 4 中间形态幼虫 cyhalothrin 抵抗(Cy-R ) 并且 cyhalothrin 易受影响(Cy-S ) Helicoverpa 有佩带徽章权利的人一旁边整个房间的补丁夹钳技术。孤立的神经原为 12 是有教养的—在改进 L15 昆虫培养基与或没有 PTX (400 ng/mL ) 的 16 h。结果证明 Cy-R 和 Cy-S 钠隧道展出了快动力学和 tetrodotoxin (TTX ) 敏感。 Cy-R 钠隧道展出了改变的 gating 性质不仅包括在电压依赖者激活(V_( 0.5act ))的 8.88-mV 权利移动和在在激活(V_( 0.5inact ))的电压依赖者的 6.54-mV 权利移动，而且是在钠隧道密度(I_(密度))的 duced 山峰(那中的55.2%个在 Cy-S 神经原)。Cy-R 钠隧道也显示出低易兴奋性，证实了由恰好在 5 激活潜力(V_( 行为 i )) 变—由 20 mV 的 10 mV 和山峰潜力(V_( 山峰)) 。PTX 施加了重要效果 onCy-S 钠隧道，减少在 70.04% 的钠隧道密度，由 14.41mV 的正确的变 V_(0.5act ) 和在 9 的 V_(0.5inact ) 。38 mV。它没引起在 Cy-R 钠隧道上面提及的参数的任何重要变化。在山峰电压的山峰的从潜伏的激活时间(T_( 山峰)) 并且在激活时间常数快(τ _( 在行为)) 在 Cy-S 和 Cy-R，神经原没被影响。结果建议对 pyrethroid 杀虫药剂抵抗的棉花一种蛾的幼虫包含不仅变化和电压门钠隧道的紧密相联的位的改变，而且可能含有 PTX 敏感的 G α _(i./o ) 的不安联合了发信号的转导小径。

不同因素对高效氯氟氰菊酯水乳剂物理稳定性的影响

通过测定粒径、跨距、乳液稳定性、冷贮稳定性、热贮稳定性等性能指标,研究不同加工方法、加工设备、剪切速率、剪切时间及水质对高效氯氟氰菊酯水乳剂物理稳定性的影响。结果表明:转相法和直接乳化法均可制备出物理稳定性符合要求的高效氯氟氰菊酯水乳剂,但转相法制备的水乳剂具有更小的中位粒径和跨距;相比磁力搅拌器和超声波,采用高速分散机剪切制备的水乳剂中位粒径更小,稳定性更好;剪切速率为3 000 r/min、剪切时间为5 min,水乳剂具有最小的中位粒径和跨距;不同水质对高效氯氟氰菊酯水乳剂的稳定性具有一定影响,应选择去离子水或自来水制备。

三氟氯氰菊酯对鸡胚的发育毒性及雏鸡生长发育的评价

目的:探讨三氟氯氰菊酯(Lambda-cyhalothrin,LCT)对鸡胚的发育毒性及其出壳后21 d内生长发育的影响。方法:选择已孵化7胚龄的草鸡胚蛋160枚,随机分为5组,每组32枚。Ⅰ组(对照组)向每枚鸡胚的卵黄囊注射0.1 mL生理盐水,Ⅱ~Ⅴ组(处理组)分别向每枚鸡胚的卵黄囊注射0.1 mL 2.5、25、250、2500μg/mL LCT,灭菌石蜡封口,继续孵化至雏鸡出壳,期间分别测定孵化第10、18天的死胎数、生存率以及孵化率、弱雏率、出壳重与第18天胚蛋重的比值等指标;雏鸡出壳后饲喂21 d分别测定体质量、胸肌质量、腿肌质量、部分内脏器官指数、血清生化指标及肝肾氧化应激指标。结果:Ⅴ组的死胚数、死胚率、弱雏率明显高于对照组和Ⅱ~Ⅳ组;Ⅱ~Ⅳ组雏鸡21日龄的体质量、胸肌和腿肌质量低于对照组,血清CREA与UREA-N含量、AST和ALT活性,与对照组相比无显著变化;21日龄时,Ⅲ组肝组织和Ⅱ组肾组织的GSH含量明显升高(P<0.01或P<0.05),Ⅲ组肝组织MDA含量显著增加(P<0.05),各试验组肝、肾组织的SOD活性有增加趋势,但与对照组相比无显著变化(P>0.05)。结论:高剂量LCT暴露对鸡胚具有明显的发育毒性,胚胎期中低剂量LCT暴露抑制出壳后雏鸡的早期生长发育,氧化应激损伤是其毒性机制之一。

茶叶和土壤中cis-联苯菊酯、高效氯氟氰菊酯手性对映体残留分析

为了满足茶叶和土壤中手性农药cis-联苯菊酯和高效氯氟氰菊酯对映异构体残留检测的需要,本试验首次对比研究了正相液相色谱条件下,Daicel ChiralPak®AS-H、Phenomenex®Cellulose-1和Cellulose-3柱对两组手性对映体的拆分效果,以及气相色谱条件下BGB-172柱的分离测定效果,并建立了基于手性气相色谱分离的茶叶和土壤中cis-联苯菊酯和高效氯氟氰菊酯对映体残留分析方法。样品采用正己烷和丙酮提取,Florisil与GCB混合柱净化,气相色谱手性柱BGB-172程序升温分离,电子捕获检测器(ECD)外标法定性定量测定。结果表明,在2.5~800μg·L^(-1)浓度范围内,cis-联苯菊酯对映体色谱峰面积(Y)与浓度(x)之间分别满足线性方程Y=15381.1x-279657.5(r=0.9967)和Y=17387.6x-399048.0(r=0.9937),对映体分数(EF值)=0.489±0.017;在2.5~200μg·L^(-1)浓度范围内,高效氯氟氰菊酯对映体分别满足线性方程Y=22083.8x-161004.3(r=0.9923)和Y=23001.1x-167694.8(r=0.9922),EF=0.492±0.008。在0.005、0.050和0.50 mg·kg^(-1)3个添加浓度水平下,cis-联苯菊酯和高效氯氟氰菊酯对映体在不同茶叶、土壤样品中的平均添加回收率为61.6%~123.4%,相对标准偏差(RSD)为2.5%~14.6%,检测限低于0.001 mg·L^(-1),方法定量限低于0.005 mg·kg^(-1),不同样品中未见到明显基质效应。综上,该方法能够满足cis-联苯菊酯和高效氯氟氰菊酯对映体残留分析的需要,用于研究茶鲜叶中cis-联苯菊酯和高效氯氟氰菊酯对映体残留消解,且无明显对映体选择性差异。本研究结果为进一步开展2种手性农药在茶叶生长和加工过程中的残留和消解规律研究提供了技术支持。

10%高效氯氟氰菊酯水乳剂和21%辛硫·高氯氟乳油杀灭白纹伊蚊的现场效果

目的 观察10%高效氯氟氰菊酯水乳剂和21%辛硫·高氯氟乳油(1%高效氯氟氰菊酯、20%辛硫磷)空间喷雾对白纹伊蚊的杀灭效果,为蚊虫防治的药剂选择提供参考。方法 参照(GB/T 27781—2011)空间喷雾效果的评价方法,采用超低容量喷雾对10%高效氯氟氰菊酯水乳剂(按1∶200稀释)和21%辛硫·高氯氟乳油(1%高效氯氟氰菊酯、20%辛硫磷,按1∶150稀释)进行杀灭白纹伊蚊的现场实验。结果 0.07%高效氯氟氰菊酯对白纹伊蚊2 min击倒率为76%,24 h死亡率为14%,该白纹伊蚊种群为抗性种群。10%高效氯氟氰菊酯水乳剂稀释200倍对距离10、30、50 m挂笼内白纹伊蚊24 h死亡率分别为84.19%、78.65%、36.26%。21%辛硫·高氯氟乳油稀释150倍对距离10、30、50 m挂笼内白纹伊蚊24 h死亡率分别为37.94%、20.17%、10.83%。不同距离死亡率差异有统计学意义(χ^(2)=19.679,P<0.01;χ^(2)=48.202,P<0.01)。结论 2种杀虫剂对现场白纹伊蚊均有一定的杀灭作用,在试验设置的稀释浓度下,10%高效氯氟氰菊酯水乳剂空间喷雾效果显著优于21%辛硫·高氯氟乳油。

氯虫苯甲酰胺对荔枝蒂蛀虫不同虫态的室内毒力测定

荔枝蒂蛀虫Conopomorpha sinensis Bradley是为害荔枝和龙眼的重要害虫,其为害的隐蔽性增加了防治难度。为了探索安全、有效的药剂防治手段和明确氯虫苯甲酰胺的适合施药时期,本研究在室内条件下,以防控荔枝蒂蛀虫常用药剂高效氯氟氰菊酯为对照药,采用喷雾法和药膜法,分别测定了100、10、1、0.1和0.01 mg/L的5个浓度梯度下,氯虫苯甲酰胺对荔枝蒂蛀虫卵、初孵幼虫的毒杀作用以及对成虫的触杀作用。研究结果表明,氯虫苯甲酰胺的5个浓度梯度对产后24 h、48 h和72 h蒂蛀虫卵孵化抑制率均显著高于高效氯氟氰菊酯;氯虫苯甲酰胺对蒂蛀虫初孵幼虫的毒力是高效氯氟氰菊酯的10倍,对荔枝蒂蛀虫初孵幼虫的LC_(50)分别为3.32 mg/L和38.78 mg/L。而在100 mg/L浓度下氯虫苯甲酰胺和高效氯氟氰菊酯对成虫触杀的校正死亡百分率最高分别为34.36%和77.35%。综上所述,氯虫苯甲酰胺对荔枝蒂蛀虫具有较强的杀卵活性和杀初孵幼虫活性,在荔枝生产上具有潜在的应用价值;鉴于其对成虫的触杀作用不强,故建议在荔枝蒂蛀虫的产卵高峰期和初孵幼虫期使用,以期将荔枝蒂蛀虫于发生为害之前进行有效控制。

22%噻虫嗪·高效氯氟氰菊酯悬浮剂对环境非靶标生物的急性毒性与风险评估

建立了基于UPLC-MS/MS法测定曝气自来水和BG11培养基中噻虫嗪、高效氯氟氰菊酯的定性定量分析方法,测定了22%噻虫嗪·高效氯氟氰菊酯悬浮剂对环境5种非靶标生物的毒性并分级。结果表明,22%噻虫嗪·高效氯氟氰菊酯悬浮剂对斑马鱼、大型溞和家蚕的毒性为剧毒;对蜜蜂的毒性为高毒;分别以生长率抑制率和生物量增长抑制率为毒性终点计时,对羊角月牙藻的毒性分别为低毒和中毒。22%噻虫嗪·高效氯氟氰菊酯悬浮剂对蜜蜂和家蚕均存在潜在风险。建议实际施用过程注意周围开花植物花期,蚕室及桑园附近禁用。

应用GC-MS测定葡萄中的5种农药残留

酿酒葡萄是河北昌黎的主要水果种植品种,由于受海洋气候的影响,当地空气湿热,葡萄病害十分严重,因而农药使用十分频繁,为了评价其农药残留水平,我们采用丙酮提取,凝胶分离,硅胶小柱净化,GC-MS的选择离子方式检测对采集的葡萄样品进行5种农药(百菌清、精甲霜灵、苯醚甲环唑、嘧菌酯、高效氯氟氰菊酯)的残留分析.……

蔬菜粉中氯氰菊酯和氯氟氰菊酯农药残留量的测定能力验证研究

通过参加“CFAPA-1716蔬菜粉中氯氰菊酯和氯氟氰菊酯农药残留量的测定”能力验证,加强本实验室对蔬菜中氯氰菊酯和氯氟氰菊酯的检测能力,从而保障食品安全监督工作的质量。样品按照《蔬菜和水果中有机磷、有机氯、拟除虫菊酯和氨基甲酯类农药多残留的测定》(NY/T 761—2008)第二部分方法二进行处理,通过气相色谱仪测定。样品中氯氰菊酯和氯氟氰菊酯的|Z|均小于2,表明本实验室对于蔬菜中氯氰菊酯和氯氟氰菊酯农药残留量的测定能力较好。

食用农产品中农药残留状况调查报告

通过对市面上374批次的食用农产品进行26种农药残留检测,经过数据分析统计市面上的食用农产品中存在农药残留的情况。结果表明:农药残留检出率为26%,苯醚甲环唑、氯氟氰菊酯、氯氰菊酯、毒死蜱、联苯菊酯是被检出最多的5种农药。虽然食用农产品存在农药残留的情况,但是目前食用农产品还是安全可靠的。