Nitrogen detector (NPD) is a quality detector, which is suitable for the analysis of nitrogen and phosphorus compounds, high sensitivity, high selectivity detector. It has a structure similar to that of FID except that a ceramic bead coated with an alkali metal salt such as Na2SiO3, Rb2SiO3 compound is placed between the burning hydrogen flame and the collector when the sample vapor and the hydrogen gas flow through the alkali metal salt Surface, nitrogen and phosphorus compounds will be reduced from the alkali metal vapor to obtain electrons, the loss of electrons of alkali metal salt re-deposition on the surface of the ceramic beads.

The nitrogen-phosphorus detector has a long service life and extremely high sensitivity, and can detect 5 x 10 (-13 times) g / s azobenzene nitrogen-containing compound, 2.5 x 10 (-13 times) g / s phosphorus-containing compound , Such as marathon pesticides. It has a high response to nitrogen and phosphorus compounds. While the other compounds have a response of 10,000 to 100,000 times lower. Nitrogen and phosphorus detector is widely used in pesticides, petroleum, food, medicine, spices and clinical medicine and other fields.

氮磷检测器 详细信息：