在线氢火焰离子化检测器及在色谱中的应用，室内空气，焦炉煤气，炼厂气，天然气1，变压器油，多氯联苯，植物油，增塑剂，塑化剂，医疗器械，环氧乙烷，氨气，氨水，过氧化物，二甲醚
在线氢火焰离子化检测器及在色谱中的应用
在线氢火焰离子化检测器及在色谱中的应用 详细信息：
氢火焰离子化检测器（FID）
高使用温度：400℃
小检出限：≤2.5*10 -12 g/s(n-C16)
线性范围：107（±10%）
噪声≤5×10-14A
漂移≤2×10-13 /30min
自动点火方式
浩瀚色谱（山东）应用技术开发有限公司构建了一种微小型氢火焰离子化检测器(m-FID)。与传统FID不同,助燃空气从收集极上部侧面导入,沿收集极与检测器壳体之间的缝隙向下流动,以环状气流沿壁流入燃烧室,流向反转后从中空的收集极内流出。火焰喷口位于燃烧腔的正中心轴线上,该区域助燃气的流动非常稳定,因此噪音电平非常低。采用更高的极化电压以提高离子化效率。对喷口材料及其内径、收集极长度、收集极喷口的距离等结构参数进行了优化。在优条件下,极化电压800 V时,检测器的信噪比比极化电压为150 V时提高一个数量级以上,检出限达1×10-12g/s。相对于常规FID,m-FID的气体消耗降低了70%,仅需要氢气和空气两种气体;具有体积小、重量轻、结构简单、灵敏度高、成本低廉等优点,适合作为便携式微型色谱的通用型检测器。
在线氢火焰离子化检测器及在色谱中的应用 图片：
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On-line hydrogen flame ionization detector and its application in chromatography
On-line hydrogen flame ionization detector and its application in chromatography Details:
Hydrogen flame ionization detector (FID)
Maximum operating temperature: 400℃
Minimum detection limit: ≤2.5*10 -12 g/s(n-C16)
Linear range: 107 (±10%)
Noise≤5×10-14A
Drift≤2×10-13 /30min
automatic ignition
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. constructed a miniature hydrogen flame ionization detector (m-FID). Different from the traditional FID, the combustion air is introduced from the upper side of the collector, flows downward along the gap between the collector and the detector housing, flows into the combustion chamber along the wall as an annular airflow, and reverses the flow direction from the hollow collector. outflow. The flame nozzle is located on the central axis of the combustion chamber, and the flow of the combustion gas in this area is very stable, so the noise level is very low. Higher polarization voltages were used to improve ionization efficiency. Structural parameters such as the nozzle material and its inner diameter, the length of the collector, and the distance from the collector to the nozzle are optimized. Under the optimal conditions, when the polarization voltage is 800 V, the signal-to-noise ratio of the detector is more than one order of magnitude higher than that when the polarization voltage is 150 V, and the detection limit reaches 1×10-12g/s. Compared with conventional FID, the gas consumption of m-FID is reduced by 70%, only hydrogen and air are required; it has the advantages of small size, light weight, simple structure, high sensitivity and low cost, and is suitable as a general-purpose portable micro-chromatograph. type detector.
On-line hydrogen flame ionization detector and its application in chromatography Picture:
