FPD 火焰光度检测器

火焰光度检测器
火焰光度检测器 详细信息：
(flame photometric detector,FPD)是气相色谱仪用的一种对含磷、含硫化合物有高选择型、高灵敏度的检测器。试样在富氢火焰燃烧时，含磷有机化合物主要是以HPO碎片的形式发射出波长为526nm的光，含硫化合物则以S2分子的形式发射出波长为394nm的特征光。光电倍增管将光信号转换成电信号，经微电流放大纪录下来。此类检测器的灵敏度可达几十到几百库仑/克，zui小检测量可达10-11克。同时，这种检测器对有机磷、有机硫的响应值与碳氢化合物的响应值之比可达104，因此可排除大量溶剂峰及烃类的干扰，非常有利于痕量磷、硫的分析，是检测有机磷农药和含硫污染物的主要工具。




火焰光度检测器 应用：


Flame photometric detector

(flame photometric detector, FPD) is a detector with high selectivity and high sensitivity for phosphorus and sulfur compounds used in gas chromatograph. When the sample burns in a hydrogen-rich flame, the phosphorus-containing organic compound mainly emits light with a wavelength of 526 nm in the form of HPO fragments, and the sulfur-containing compound emits characteristic light with a wavelength of 394 nm in the form of S2 molecules. The photomultiplier tube converts the optical signal into an electrical signal, which is amplified and recorded by micro current. The sensitivity of this type of detector can reach tens to hundreds of coulombs/gram, and the minimum detection quantity can reach 10-11 grams. At the same time, the ratio of the response value of this detector to organic phosphorus and organic sulfur to the response value of hydrocarbons can reach 104, so it can eliminate the interference of a large number of solvent peaks and hydrocarbons, which is very conducive to the analysis of trace phosphorus and sulfur , Is the main tool for detecting organic phosphorus pesticides and sulfur-containing pollutants.