用于測定煤中硫的能量色散 X 射線熒光光譜儀 Compass 4294 plus

xrf分析儀的油樣制備步驟

不同于化學法、庫侖滴定法、高溫燃燒中和法和紅外光譜法，現(xiàn)有國標煤總硫含量測定方法需要化學試劑多、操作復雜、耗時長，我公司采用能量分散型X-射線熒光光譜儀 Compass 4294 plus 快速、無損且可靠地測定煤中的硫含量。該方法是一種相對分析方法，將未知樣品的光譜與硫含量已知的樣品進行比較，進行定量分析。應用由實驗確定 本方法分析了煤中硫的合適的制樣方法、制樣條件和測定條件；經(jīng)過樣品數(shù)據(jù)采集、光譜預處理和基體校正，建立相應的校準曲線。結果表明：該方法的制樣效果良好。在30 MPa和30 s的條件下，可獲得光滑的表面，不易斷裂；經(jīng)實驗測定的硫元素測量管電壓和管電流分別為10 kV和300 μA；內(nèi)置真空裝置可有效控制光基體背景散射嚴重、硫特征譜線易被空氣吸收等問題；減小樣品粒徑與經(jīng)驗系數(shù)法修正相結合，可減少基體效應的影響；光譜平滑處理后，有效提高光譜分辨率，提高測量精度

Energy Dispersive X-ray Fluorescence Spectrometer Compass 4294 plus for Determination of Sulfur in Coal

oil sample prepare steps by xrf analyzer

Different from the chemical method, coulometric titration, high temperature combustion neutralization method and infrared spectroscopy, the existing national standard coal total sulfur content measurement methods require many chemical reagents, complicated operations and long time-consuming, our company adopts energy dispersion type The X-ray fluorescence spectrometer Compass 4294 plus quickly, non-destructively and reliably determines the sulfur content in coal. This method is a relative analysis method that compares the spectrum of an unknown sample with a sample with a known sulfur content for quantitative analysis. The application is determined by experiments This method analyzes the appropriate sample preparation methods, sample preparation conditions and measurement conditions of sulfur in coal; after sample data collection, spectrum preprocessing and matrix correction, the corresponding calibration curve is established. The results show that: The sample preparation effect of the method is good. Under the conditions of 30 MPa and 30 s, a smooth surface and not easy to break can be obtained; the sulfur element measuring tube voltage and tube current determined by the experiment are 10 kV and 300 μA, respectively; built-in vacuum device It can effectively control the problems of severe background scattering of light matrix and easy absorption of sulfur characteristic spectrum lines by air; the combination of reducing sample particle size and empirical coefficient method correction can reduce the influence of matrix effect; smoothing the spectrum After processing, the spectral resolution is effectively enhanced and the measurement accuracy is improved

Portable sulfur and chlorine in oil XRF analyzer (1)