产品介绍
790氮磷检测器
790氮磷检测器 详细信息:
氮磷检测器(nitrogen phosphorus detector,NPD)是一种质量检测器,适用于分析氮,磷化合物的高灵敏度、高选择性检测器。它具有与FID相似的结构,只是将一种涂有碱金属盐如Na2SiO3,Rb2SiO3类化合物的陶瓷珠,放置在燃烧的氢火焰和收集极之间,当试样蒸气和氢气流通过碱金属盐表面时,含氮、磷的化合物便会从被还原的碱金属蒸气上获得电子,失去电子的碱金属形成盐再沉积到陶瓷珠的表面上。
氮磷检测器的使用寿命长、灵敏度极高,可以检测到5×10(-13次)g/s偶氮苯类含氮化合物,2.5×10(-13次)g/s的含磷化合物,如马la松农药。它对氮、磷化合物有较高的响应。而对其他化合物有的响应值低10000~100000倍。氮磷检测器被应用于农药、石油、食品、药物、香料及临床医学等多个领域。
790氮磷检测器 图片:
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790 nitrogen and phosphorus detector
790 Nitrogen and Phosphorus Detector Details:
Nitrogen Phosphorus Detector (NPD) is a mass detector, suitable for analyzing nitrogen and phosphorus compounds with high sensitivity and high selectivity. It has a structure similar to FID, except that ceramic beads coated with alkali metal salts such as Na2SiO3 and Rb2SiO3 compounds are placed between the burning hydrogen flame and the collector. When the sample vapor and hydrogen flow through the alkali metal salt At the surface, the nitrogen and phosphorus-containing compounds will obtain electrons from the reduced alkali metal vapor, and the alkali metal that has lost electrons will form a salt and then deposit on the surface of the ceramic beads.
The nitrogen and phosphorus detector has a long service life and extremely high sensitivity. It can detect 5×10 (-13 times) g/s azobenzene nitrogen compounds and 2.5×10 (-13 times) g/s phosphorus compounds , Such as marathon pesticides. It has a high response to nitrogen and phosphorus compounds. The response to other compounds is 10,000 to 100,000 times lower. Nitrogen and phosphorus detectors are widely used in many fields such as pesticides, petroleum, food, medicine, perfume and clinical medicine.
790 Nitrogen and Phosphorus Detector Picture: