...土壤为研究对象,选用GC/ECD对该地区表层农田土壤中有机氯农药(Organochlorine pesticides,OCPs)中滴滴涕类(DDTs)和六六六类(HCHs)进行分析,并探讨其组成特征和来源.
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Iwata等（1993）在1989-1990年中测定分析了HCHs（六氯环己烷）的浓度，发现HCHs在北半球海洋空气和表层海水中的浓度要高于南半球，并且在靠近极地地区的浓度要高于中低纬度地区。
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...州湾 从胶州湾、套子湾及四十里湾海域和邻近河流采集了48个表层沉积物样品,采用气相色谱的分析方法对沉积物中有机氯农药（HCHs、HCB和DDTs）进行了测定,目的是探讨其在该研究区域的分布特征和来源.
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The School Founded in 1869, Hunter College High School (HCHS) , situate don Manhattan 'sUpper East Side is a co-educational, tuition-free, publicly funded school serving ..
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The residual amounts of HCHs and DDTs in soil of Lanzhou area are lower compared with that of other cities.
其他城市相比，土壤中滴滴涕和六六六的残留量较低。
Conclusion Multi-electrode radiofrequency ablation therapy is a safe and effective treatment option for patients with HCHs.
结论多电极射频治疗肝海绵状血管瘤是一种安全、有效的治疗方法。
The concentrations of hexachlorocyclohexane isomers (HCHs) in muscle, skin, liver, stomach, heart, eggs, feed and feces of chicken from a poultry farm were determined by GC-ECD.
用气相色谱-电子捕获器法测定了北京郊区某养鸡场不同生长期的饲养鸡的肌肉、表皮、肝脏、胃、心脏以及鸡蛋、饲料和粪便中hch的残留浓度。
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