查询词典 heptachlor

Pesticides were extracted from tea with hexane-acetone (volume ratio is 1:1) in an ultrasonic bath and cleaned up on a Florisil and neutral alumina column, then were determined by gas chromatography with negative chemical ionization mass spectrometric detection in the selected ion monitoring mode, and with heptachlor epoxide as the internal standard. Spiked blank samples were used as standards to counteract the matrix effect observed in the chromatographic determination.

茶叶试样用V/V=1/l混合提取剂超声提取，经Florisil矽藻土和中性氧化铝混合层析柱净化后，以环氧七氯为内标物，采用GC-NCI-MS的选择离子监测方式分析；探讨了茶叶试样的基体诱导色谱响应增强影响所产生的分析误差及其减小的措施，用空白试样基体匹配校准曲线法定量分析。

The one was to conduct field studies and empirical measurements in various environmental media of the normal and the workplace fields and nearby residents to explore the concentrations and distribution for those selected chemicals, including mercury, tributyltin oxide, triphenyltin hydroside, dieldrin, DDT (the derivatives DDD and DDE is included), endrin, heptachlor, aldrin, lindane, hexachlorobenzene, benzene and epichlorohydrin.

二、完成环氧氯丙烷及苯毒性化学物质，十二厂次之运作工厂厂内及周界环境流布（依物质特性选定检测之介质及相关暴露族群）共360个检测样品之实地量测调查资料，以了解、研判其在厂内之释放来源，以及运作工厂周界可能存在之环境介质及相关暴露族群之暴露浓度含量分布，并针对相关暴露族群进行不同途径之暴露推估。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。