丙溴磷,杀螨隆,氟铃脲等防治小菜蛾及菜青虫试验

试验结果表明，丙溴磷、杀螨隆、氟铃脲等对小菜蛾均有效，且持效期长，丙溴磷具有速效性及对菜青虫高效。     

气相色谱-负化学电离质谱法测定茶叶中氟乐灵、三唑酮、丙溴磷的残留量

建立以固相萃取净化和气相色谱-负化学电离质谱(GC/NCI/MS)技术测定茶叶中氟乐灵、三唑酮、丙溴磷残留量的方法。样品经正己烷-丙酮(1+1)提取,共提物中的基体杂质经Cleanert TBT固相萃取柱去除,用负化学源质谱检测。氟乐灵、三唑酮、丙溴磷三种农药的方法回收率在74.3～98.1%之间,室内变异系数在6.2～12.5%之间(n=6),方法的检出限分别为1μg/kg、5μg/kg、10μg/kg。     

溴丙磷的气相色谱分析

采用气相色时测定溴丙磷原药及制剂的含量，选用５％ＯＶ－１０１／Ｇａｓ Ｃｈｒｏｍ Ｑ色谱柱，以邻苯二甲酸二丁酯为内标物，三氯甲烷为溶剂，用氢火焰离子化检测器测定，其回收率在９８．６￣１００．４％，原油和乳油的变异系数分别为０．４２％和０．４８％。     

复配农药制剂丙溴磷·毒死蜱的气相色谱同时分析方法研究

建立气相色谱法同时测定丙溴磷和毒死蜱含量的分析方法,OV-101为固定液的石英毛细管柱,邻苯二甲酸二异丙酯为内标物。实验表明,丙溴磷和毒死蜱的线性相关系数分别为0.9988和0.9967,平均回收率分别为99.64％和99.71％。     

丙溴磷防治棉铃虫药效试验

１９９３、１９９４年用４０％丙溴磷乳油进行了防治棉铃虫药效试验，两年的试验结果表明，亩用该药６０、８０、１００毫升，在药后７ 天远达到了８０％以上的防效，亩施１００毫升，防效均达到９３．７％以上，明显高于２．５％三氟氯氰菊酯乳油亩施３０毫升的防效７７．０％。该药是一种防治抗性棉铃虫的优良杀虫剂，建议棉田用量为亩施８０￣１００毫升为宜。     

高效液相色谱法测定丙溴磷

利用高效液相色谱法对丙溴磷进行了分析测定。本实验选择μＢｏｎｄａｐａｋ Ｃ１８色谱柱、甲醇：水以动相和ＵＶ－２８０纳米检测等色谱条件，使丙溴磷得到了较好地分离。本方法定量测定的回收率为９８．８２％，变异系数为３．１２％，。实验结果表明，本方法是一种快速，简便，灵敏度高，重现性较好的测定方法。     

44%丙溴磷·氯氰菊酯水乳剂的配方研究

根据水乳剂形成的机理,选用合适的表面活性剂、助溶剂等,制备出44%丙溴磷.氯氰菊酯水乳剂,并对其进行了性能测定和田间药效试验。结果表明,44%丙溴磷.氯氰菊酯水乳剂与44%丙溴磷.氯氰菊酯乳油药效相当。     

复配农药制剂丙溴磷·毒死蜱的气相色谱同时分析方法研究

建立气相色谱法同时测定丙溴磷和毒死蜱含量的分析方法,OV-101为固定液的石英毛细管柱,邻苯二甲酸二异丙酯为内标物。实验表明,丙溴磷和毒死蜱的线性相关系数分别为0.998 8和0.996 7,平均回收率分别为99.64%和99.71%。     

Pesticides and heavy metals levels in Egyptian leafy vegetables and some aromatic medicinal plants

A total of 835 samples of leafy vegetables and some aromatic medicinal plants were collected from five different areas of Egypt during 1999. Ninety-seven per cent of the leafy vegetables were contaminated with heavy metals with 39% exceeding the maximum limits for each element. Cadmium was detected in 78 of 116 samples of leafy vegetable, although without any exceeding the maximum limits. However, lead was detected in 99 samples, of which 39 exceeded the maximum limits (0.3 mg kg^-1) and 56 medicinal plant samples of 70 had lead levels above 0.5 mg kg^-1. Copper was detected in 69 medicinal plant samples, of which 58 samples contained levels higher than 10 mg kg^-1. However, cadmium was only found in 43% of samples with only two of 70 samples above the maximum limit. Seventy-three per cent of the samples of medicinal plants were contaminated with pesticide residues, of which 44% contained amounts that exceeded maximum residue limits. Malathion was the most frequently found pesticide residue, being detected in 203 of 391 (52%.) samples, followed by profenofos, which was detected in 131 of 391 (33%) samples.     

气相色谱法测定陈皮中丙溴磷的残留量

目的建立气相色谱法测定陈皮中丙溴磷残留量的分析方法。方法样品经乙腈提取,经过滤,QuECHERS净化,浓缩后,用丙酮定容,采用气相色谱法测定、外标法定量。结果丙溴磷在0.005～1.000μg/mL范围内线性良好,相关系数r~2达到0.999;方法检出限为0.008 mg/kg;平均回收率为89.9%～110.8%,相对标准偏差(relative standard deviation,RSD)为2.2%～3.3%(n=6)。结论本方法操作简便、灵敏度高、准确度好,适用于陈皮中丙溴磷残留量测定。