涕灭威(Aldicarb)是一种具有内吸作用的高效杀虫、杀螨剂及土壤杀线虫剂。它在环境中不稳定,易被氧化成涕灭威亚砜和涕灭威砜。一般是将涕灭威和涕灭威亚砜转化为相对稳定的涕灭威砜,然后用气相色谱火焰光度检测器(FPD)测定,FPD对含硫的有机化合物具有选择性强、灵敏度高的特点。但是,火焰的氧化还原性质(即氢氧比)、检测温度、汽化温度、柱温度等因素都对灵敏度有较大影响。要想得到高的灵敏度,必须对上述条件进行选择。 Aldicarb is a highly effective insecticide, acaricide and soil nematocide with systemic action. It is unstable in the environment and is readily oxidized to aldicarb and aldicarb. The conversion of aldicarb and aldicarb to relatively stable aldicarb is generally followed by gas chromatographic flame photometric detector (FPD), which is highly selective and sensitive to sulfur-containing organic compounds Features. However, the flame redox properties (ie, the ratio of oxygen), detection temperature, vaporization temperature, column temperature and other factors have a greater impact on the sensitivity. In order to obtain high sensitivity, the above conditions must be selected.