Flame photometric detector FPD for short, is one of the 60 s was developed with high sensitivity, high selectivity of tester. High selectivity refers to the detector only have signal response to sulphur, phosphide, so also called sulphur phosphorous detector.

       Su xiang ying analysis technology co., LTD., the latest successful development is a kind of rich oxygen, rich hydrogen flame type GC7990 double light path double flame photometric detector (GC7990DFPD). This new detector has the upper and lower two flame, the flame of a rich oxygen flame, used for the organic sulfur and phosphorus compounds and hydrocarbon oxidation generating corresponding oxide; On fire for a rich hydrogen flame, air can be organic sulfur, phosphorus oxide reduction for S2, HPO chemiluminescence molecules, etc. And hydrocarbon oxidation products, such as CO2, H2O and light signal, so DFPD can eliminate interference of hydrocarbon, and selectively measuring sulfur phosphorus compounds. In quantitative analysis, sulfur signals strict linear relationship with the square of the sulfide concentration (or a linear relationship with the square root of the signal and concentration), the response values of sulfur is 10-12 grams/SEC, response value of sulfur is 10 to 11 grams/SEC. At the same time, the detector has the double optical path system, to realize a sample synchronous detection of sulfur and phosphorus compounds. Therefore DFPD have high sensitivity, good selectivity and fast response time, analysis of high efficiency, can answer the capillary column and packed column, so in the environmental protection, engineering science, food inspection, and agricultural residues test has been widely used.

              火焰光度檢測器簡稱FPD,是六十年代末期才發(fā)展起來的一種具有高靈敏度、高選擇性的檢驗器。所謂高選擇性是指檢測器只對含硫、磷化物有信號響應,因此也叫硫磷檢測器。

             滕州市翔鷹分析技術有限公司研制成功的是一種富氧、富氫焰型的GC7990雙光路雙火焰光度檢測器(GC7990DFPD)。該新型檢測器具有上、下兩個火焰,下火焰為一富氧焰,用于將有機硫、磷化合物及烴類氧化生成相應的氧化物;上火焰為一富氫空氣焰,可將有機硫、磷氧化物還原為S2、HPO等化學發(fā)光分子。而烴類的氧化產(chǎn)物,如CO2、H2O等無光信號,所以DFPD能夠排除烴類干擾,而選擇性地測量硫磷化合物。在作定量分析時,硫信號嚴格與硫化物濃度的平方成線性關系(或信號的平方根與濃度成線形關系),對硫的響應值是10-12克／秒,對硫的響應值是10-11克／秒。同時該檢測器具有雙光路系統(tǒng),實現(xiàn)一次進樣同步檢測含硫和磷化合物。因此DFPD具有靈敏度高、選擇性好、響應時間快、分析效率高、可以接毛細管柱、填充柱等特點,所以在環(huán)境保護、工程科學、食品中的檢驗,以及農(nóng)殘留量檢驗等方面得到了廣泛的應用。