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Method for analyzing Cu, As, Pb and Zn elements in boiler smoke by X-ray fluorescence spectroscopy

A fluorescence spectrum and X-ray technology is applied in the field of X-ray fluorescence spectrum analysis of boiler smoke, which can solve the problems of reduced use efficiency and service cycle, increased maintenance cost of platinum yellow crucible, and complex composition of boiler smoke samples, so as to reduce exposure to dangerous sources. The number of times, the effect of reducing the matrix effect of the sample, and saving the cost of sample preparation

Inactive Publication Date: 2019-10-25
LIANGSHAN MINING CO LTD
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Problems solved by technology

Although this method can effectively reduce the matrix effect of the sample, the processing steps are cumbersome and time-consuming, and the composition of the boiler smoke sample is extremely complex, which is easy to corrode the platinum yellow crucible, resulting in a significant reduction in the use efficiency and service life of the crucible maintenance cost, increasing the platinum Yellow crucible maintenance cost. At present, in order to protect the crucible, our department uses the corroded crucible to melt the boiler soot, and then uses the new crucible to demould, which increases the sample preparation time, and manually transfers the high-temperature molten liquid. The safety factor is low, and according to Long-term monitoring, the analysis accuracy of the sample that has been melted and stripped for the second time is relatively unstable, and the requirements for personnel in various details during the operation are relatively high

Method used

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  • Method for analyzing Cu, As, Pb and Zn elements in boiler smoke by X-ray fluorescence spectroscopy
  • Method for analyzing Cu, As, Pb and Zn elements in boiler smoke by X-ray fluorescence spectroscopy
  • Method for analyzing Cu, As, Pb and Zn elements in boiler smoke by X-ray fluorescence spectroscopy

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Embodiment 1

[0042] Instruments and equipment, materials: 5E-PCAIX300 closed pulverizer, Panalytical Axios PW4400 X-ray fluorescence spectrometer, tablet press ZHY-601A, plastic ring Ф30×5mm.

[0043] 1. Tablet sample preparation conditions

[0044] Select a smooth and flat mold with a surface roughness of Ra0.1, and place a plastic pressure ring (PVC material, 3mm high) placed on the mould. Grind the boiler dust until it can pass through a 150-mesh sieve, accurately weigh 15±0.005g of the boiler dust that has passed through the 150-mesh sieve, carefully place it in the center of the plastic pressure ring, and directly press it into tablets. The holding time is 10-15s. This method does not require special mods, and does not require additional adhesives.

[0045] 1. Tablet forming and smoothness

[0046] Boiler soot samples (30t, 40t, 50t) prepared under three pressure intensities (see figure 1 ) for comparison, observe the measured surface, the 30t pressure sample has obvious granular...

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Abstract

The invention discloses a method for analyzing Cu, As, Pb and Zn elements in boiler smoke by X-ray fluorescence spectroscopy. A direct compression method is used in a sample preparation process, a module group does not need to be specially produced, and adhesive does not need to be added in addition so that a sample for analysis and detection can be obtained. Preparation cost is greatly reduced, and safety during an operation process is improved. After the prepared sample is detected by the detection method of the invention, high accuracy, good stability and high detection efficiency are possessed, and the sample is highly practical, and is worth promoting.

Description

technical field [0001] The invention relates to the field of X-ray fluorescence spectrum analysis methods for boiler smoke, in particular to a method for X-ray fluorescence spectrum analysis of Cu, As, Pb and Zn elements in boiler smoke. Background technique [0002] The use of X-ray fluorescence spectroscopy to analyze boiler smoke is a commonly used analysis method. At present, the boiler smoke in X-ray fluorescence analysis is sample pretreatment using the fusing method: powder samples are mixed with an appropriate amount of NaNO 3 LiBO mixed at 12:22 2 , Li 2 B 4 o 7 In the mixed flux, the reducing substances and metals in the sample are pre-oxidized at a temperature of 700 ° C to avoid corrosion of the platinum crucible, and then lithium bromide (LiBr) is added to remove the film into a glass frit to provide a qualified analysis sample for the X-ray fluorescence analyzer . Although this method can effectively reduce the matrix effect of the sample, the processing s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202G01N23/223
CPCG01N23/2202G01N23/223
Inventor 刘勇魏秋实冯程王军范永亮任永专郭方贵廖波
Owner LIANGSHAN MINING CO LTD
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